./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI --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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:04:27,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:04:27,635 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:04:27,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:04:27,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:04:27,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:04:27,669 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:04:27,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:04:27,670 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:04:27,670 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:04:27,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:04:27,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:04:27,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:04:27,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:04:27,674 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:04:27,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:04:27,675 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:04:27,675 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:04:27,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:04:27,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:04:27,677 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:04:27,678 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:04:27,678 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:04:27,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:04:27,679 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:04:27,680 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:04:27,680 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:04:27,681 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:04:27,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:04:27,682 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:04:27,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:04:27,683 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:04:27,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:27,684 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:04:27,684 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:04:27,684 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:04:27,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:04:27,685 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:04:27,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:04:27,686 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:04:27,686 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:04:27,689 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_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2023-11-24 22:04:27,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:04:28,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:04:28,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:04:28,031 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:04:28,031 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:04:28,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-24 22:04:31,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:04:31,613 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:04:31,613 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-24 22:04:31,623 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data/b832b13ee/d5c5e43dbca9499690c45225b848817e/FLAG4c327556d [2023-11-24 22:04:31,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data/b832b13ee/d5c5e43dbca9499690c45225b848817e [2023-11-24 22:04:31,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:04:31,645 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:04:31,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:31,647 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:04:31,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:04:31,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:31" (1/1) ... [2023-11-24 22:04:31,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7042b94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:31, skipping insertion in model container [2023-11-24 22:04:31,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:31" (1/1) ... [2023-11-24 22:04:31,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:04:31,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:31,937 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) [2023-11-24 22:04:31,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67429fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:31, skipping insertion in model container [2023-11-24 22:04:31,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:31,939 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 22:04:31,941 INFO L158 Benchmark]: Toolchain (without parser) took 294.63ms. Allocated memory is still 155.2MB. Free memory was 112.6MB in the beginning and 101.7MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 22:04:31,941 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 55.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 22:04:31,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.75ms. Allocated memory is still 155.2MB. Free memory was 112.2MB in the beginning and 101.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 22:04:31,944 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 55.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.75ms. Allocated memory is still 155.2MB. Free memory was 112.2MB in the beginning and 101.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: 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_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI --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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:04:34,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:04:34,673 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 22:04:34,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:04:34,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:04:34,723 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:04:34,724 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:04:34,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:04:34,726 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:04:34,731 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:04:34,732 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:04:34,732 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:04:34,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:04:34,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:04:34,735 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:04:34,736 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:04:34,736 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:04:34,737 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:04:34,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:04:34,739 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:04:34,739 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:04:34,740 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:04:34,740 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:04:34,740 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:04:34,741 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:04:34,741 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 22:04:34,742 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 22:04:34,742 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:04:34,743 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:04:34,743 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:04:34,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:04:34,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:04:34,746 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:04:34,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:04:34,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:34,747 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:04:34,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:04:34,748 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 22:04:34,748 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 22:04:34,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:04:34,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:04:34,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:04:34,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:04:34,750 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 22:04:34,751 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_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2023-11-24 22:04:35,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:04:35,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:04:35,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:04:35,215 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:04:35,215 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:04:35,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-24 22:04:38,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:04:38,685 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:04:38,685 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-24 22:04:38,696 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data/12ccc060e/a9034faf5ac24746b1ca82fed2ca19bb/FLAG7dbcb7cc5 [2023-11-24 22:04:38,714 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/data/12ccc060e/a9034faf5ac24746b1ca82fed2ca19bb [2023-11-24 22:04:38,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:04:38,722 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:04:38,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:38,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:04:38,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:04:38,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:38" (1/1) ... [2023-11-24 22:04:38,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64847f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:38, skipping insertion in model container [2023-11-24 22:04:38,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:04:38" (1/1) ... [2023-11-24 22:04:38,782 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:04:39,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:39,116 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 22:04:39,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:04:39,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:39,185 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:04:39,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:04:39,265 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:04:39,265 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 22:04:39,276 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:04:39,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39 WrapperNode [2023-11-24 22:04:39,276 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:04:39,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:39,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:04:39,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:04:39,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,306 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,368 INFO L138 Inliner]: procedures = 27, calls = 69, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 343 [2023-11-24 22:04:39,376 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:04:39,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:04:39,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:04:39,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:04:39,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,478 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 11, 2, 2, 2]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 3, 1, 1, 1]. [2023-11-24 22:04:39,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,524 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:04:39,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:04:39,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:04:39,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:04:39,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (1/1) ... [2023-11-24 22:04:39,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:39,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:04:39,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:04:39,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:04:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:04:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 22:04:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 22:04:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 22:04:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 22:04:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-24 22:04:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:04:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 22:04:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 22:04:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 22:04:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 22:04:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-24 22:04:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 22:04:39,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 22:04:39,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 22:04:39,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 22:04:39,693 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-24 22:04:39,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-24 22:04:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:04:39,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:04:39,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:04:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:04:39,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:04:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:04:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 22:04:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 22:04:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 22:04:39,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 22:04:39,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-24 22:04:39,701 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:04:39,927 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:04:39,929 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:04:41,061 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:04:41,716 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:04:41,716 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-24 22:04:41,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:41 BoogieIcfgContainer [2023-11-24 22:04:41,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:04:41,720 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:04:41,720 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:04:41,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:04:41,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:04:38" (1/3) ... [2023-11-24 22:04:41,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf538b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:41, skipping insertion in model container [2023-11-24 22:04:41,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:04:39" (2/3) ... [2023-11-24 22:04:41,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf538b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:04:41, skipping insertion in model container [2023-11-24 22:04:41,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:04:41" (3/3) ... [2023-11-24 22:04:41,730 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-11-24 22:04:41,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:04:41,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-11-24 22:04:41,751 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:04:41,882 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-24 22:04:41,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 211 flow [2023-11-24 22:04:42,005 INFO L124 PetriNetUnfolderBase]: 9/92 cut-off events. [2023-11-24 22:04:42,006 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 22:04:42,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 9/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 243 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-11-24 22:04:42,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 211 flow [2023-11-24 22:04:42,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 91 transitions, 200 flow [2023-11-24 22:04:42,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:04:42,050 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;@26994c8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:04:42,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-11-24 22:04:42,057 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:04:42,058 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 22:04:42,058 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:04:42,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:42,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:42,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:04:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1043685, now seen corresponding path program 1 times [2023-11-24 22:04:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514926421] [2023-11-24 22:04:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:42,086 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 [2023-11-24 22:04:42,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:42,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:04:42,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:42,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:04:42,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:42,369 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 7 [2023-11-24 22:04:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,394 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 [2023-11-24 22:04:42,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,438 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 [2023-11-24 22:04:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,445 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 [2023-11-24 22:04:42,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,458 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 [2023-11-24 22:04:42,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,466 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 [2023-11-24 22:04:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,509 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 [2023-11-24 22:04:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,522 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 [2023-11-24 22:04:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,548 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 [2023-11-24 22:04:42,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,573 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 [2023-11-24 22:04:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 22:04:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,655 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 [2023-11-24 22:04:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,677 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 [2023-11-24 22:04:42,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,698 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 [2023-11-24 22:04:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,709 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 [2023-11-24 22:04:42,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,717 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 [2023-11-24 22:04:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,731 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 [2023-11-24 22:04:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,737 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 [2023-11-24 22:04:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,748 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 [2023-11-24 22:04:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,756 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 [2023-11-24 22:04:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,767 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 [2023-11-24 22:04:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,774 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 [2023-11-24 22:04:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,794 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 [2023-11-24 22:04:42,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:42,805 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 [2023-11-24 22:04:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:42,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:42,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514926421] [2023-11-24 22:04:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514926421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:42,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:42,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:04:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29550984] [2023-11-24 22:04:42,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:04:42,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:42,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:04:42,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:04:42,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 95 [2023-11-24 22:04:42,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:42,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:42,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 95 [2023-11-24 22:04:42,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:46,359 INFO L124 PetriNetUnfolderBase]: 9676/15009 cut-off events. [2023-11-24 22:04:46,359 INFO L125 PetriNetUnfolderBase]: For 511/512 co-relation queries the response was YES. [2023-11-24 22:04:46,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28801 conditions, 15009 events. 9676/15009 cut-off events. For 511/512 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 107230 event pairs, 7868 based on Foata normal form. 1733/9478 useless extension candidates. Maximal degree in co-relation 27858. Up to 13314 conditions per place. [2023-11-24 22:04:46,530 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 51 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-24 22:04:46,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 290 flow [2023-11-24 22:04:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:04:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:04:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-24 22:04:46,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684210526315789 [2023-11-24 22:04:46,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-24 22:04:46,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-24 22:04:46,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:46,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-24 22:04:46,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 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) [2023-11-24 22:04:46,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:46,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:46,566 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 200 flow. Second operand 3 states and 162 transitions. [2023-11-24 22:04:46,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 290 flow [2023-11-24 22:04:46,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 22:04:46,599 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 176 flow [2023-11-24 22:04:46,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-11-24 22:04:46,606 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -9 predicate places. [2023-11-24 22:04:46,607 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 176 flow [2023-11-24 22:04:46,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:46,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:46,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:04:46,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:46,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:46,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:04:46,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1043686, now seen corresponding path program 1 times [2023-11-24 22:04:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:46,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833498425] [2023-11-24 22:04:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:46,813 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 [2023-11-24 22:04:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:46,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:04:46,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:46,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 22:04:46,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:46,995 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 [2023-11-24 22:04:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,024 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 [2023-11-24 22:04:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,062 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 [2023-11-24 22:04:47,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,076 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 [2023-11-24 22:04:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 22:04:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,150 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 [2023-11-24 22:04:47,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,170 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 [2023-11-24 22:04:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,180 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 [2023-11-24 22:04:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,211 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 [2023-11-24 22:04:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,225 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 [2023-11-24 22:04:47,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,242 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 [2023-11-24 22:04:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,254 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 [2023-11-24 22:04:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,278 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 [2023-11-24 22:04:47,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,293 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 [2023-11-24 22:04:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,310 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 [2023-11-24 22:04:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,322 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 [2023-11-24 22:04:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,351 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 [2023-11-24 22:04:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,367 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 [2023-11-24 22:04:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,382 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 [2023-11-24 22:04:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,395 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 [2023-11-24 22:04:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,422 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 [2023-11-24 22:04:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,436 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 [2023-11-24 22:04:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,451 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 [2023-11-24 22:04:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:47,460 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 [2023-11-24 22:04:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:47,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:04:47,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833498425] [2023-11-24 22:04:47,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833498425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:04:47,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:04:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:04:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355962038] [2023-11-24 22:04:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:04:47,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:04:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:04:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:04:47,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 95 [2023-11-24 22:04:47,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:47,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:47,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 95 [2023-11-24 22:04:47,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:50,922 INFO L124 PetriNetUnfolderBase]: 9679/15018 cut-off events. [2023-11-24 22:04:50,923 INFO L125 PetriNetUnfolderBase]: For 111/112 co-relation queries the response was YES. [2023-11-24 22:04:50,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28535 conditions, 15018 events. 9679/15018 cut-off events. For 111/112 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 107251 event pairs, 7868 based on Foata normal form. 0/7750 useless extension candidates. Maximal degree in co-relation 28485. Up to 13327 conditions per place. [2023-11-24 22:04:51,045 INFO L140 encePairwiseOnDemand]: 82/95 looper letters, 55 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-11-24 22:04:51,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 92 transitions, 326 flow [2023-11-24 22:04:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:04:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:04:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2023-11-24 22:04:51,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2023-11-24 22:04:51,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 204 transitions. [2023-11-24 22:04:51,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 204 transitions. [2023-11-24 22:04:51,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:51,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 204 transitions. [2023-11-24 22:04:51,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,061 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,062 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 176 flow. Second operand 4 states and 204 transitions. [2023-11-24 22:04:51,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 92 transitions, 326 flow [2023-11-24 22:04:51,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:04:51,067 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 254 flow [2023-11-24 22:04:51,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2023-11-24 22:04:51,068 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2023-11-24 22:04:51,068 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 254 flow [2023-11-24 22:04:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:51,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:51,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 22:04:51,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:51,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:04:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1003014960, now seen corresponding path program 1 times [2023-11-24 22:04:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:51,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964297877] [2023-11-24 22:04:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:51,277 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 [2023-11-24 22:04:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:51,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:04:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:51,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 22:04:51,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:51,427 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 [2023-11-24 22:04:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 22:04:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,489 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 [2023-11-24 22:04:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,512 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 [2023-11-24 22:04:51,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,528 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 [2023-11-24 22:04:51,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,551 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 [2023-11-24 22:04:51,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,562 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 [2023-11-24 22:04:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,575 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 [2023-11-24 22:04:51,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,589 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 [2023-11-24 22:04:51,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,612 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 [2023-11-24 22:04:51,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,623 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 [2023-11-24 22:04:51,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,636 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 [2023-11-24 22:04:51,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,651 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 [2023-11-24 22:04:51,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,662 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 [2023-11-24 22:04:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,679 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 [2023-11-24 22:04:51,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,689 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 [2023-11-24 22:04:51,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,723 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 [2023-11-24 22:04:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,735 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 [2023-11-24 22:04:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,752 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 [2023-11-24 22:04:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,777 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 [2023-11-24 22:04:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,786 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 [2023-11-24 22:04:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,799 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 [2023-11-24 22:04:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,811 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 [2023-11-24 22:04:51,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:51,820 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 [2023-11-24 22:04:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:52,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:04:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:04:52,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:04:52,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964297877] [2023-11-24 22:04:52,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964297877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:04:52,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:04:52,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 22:04:52,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521007386] [2023-11-24 22:04:52,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:04:52,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 22:04:52,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:04:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 22:04:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:04:53,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 95 [2023-11-24 22:04:53,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:53,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:04:53,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 95 [2023-11-24 22:04:53,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:04:59,383 INFO L124 PetriNetUnfolderBase]: 9688/15045 cut-off events. [2023-11-24 22:04:59,383 INFO L125 PetriNetUnfolderBase]: For 119/120 co-relation queries the response was YES. [2023-11-24 22:04:59,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28653 conditions, 15045 events. 9688/15045 cut-off events. For 119/120 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 107219 event pairs, 7868 based on Foata normal form. 0/7777 useless extension candidates. Maximal degree in co-relation 28499. Up to 13330 conditions per place. [2023-11-24 22:04:59,520 INFO L140 encePairwiseOnDemand]: 82/95 looper letters, 55 selfloop transitions, 37 changer transitions 0/119 dead transitions. [2023-11-24 22:04:59,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 558 flow [2023-11-24 22:04:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:04:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 22:04:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 441 transitions. [2023-11-24 22:04:59,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46421052631578946 [2023-11-24 22:04:59,525 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 441 transitions. [2023-11-24 22:04:59,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 441 transitions. [2023-11-24 22:04:59,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:04:59,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 441 transitions. [2023-11-24 22:04:59,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 44.1) internal successors, (441), 10 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:59,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:59,532 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:59,533 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 254 flow. Second operand 10 states and 441 transitions. [2023-11-24 22:04:59,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 558 flow [2023-11-24 22:04:59,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 119 transitions, 558 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 22:04:59,538 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 498 flow [2023-11-24 22:04:59,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2023-11-24 22:04:59,540 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 7 predicate places. [2023-11-24 22:04:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 498 flow [2023-11-24 22:04:59,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:04:59,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:04:59,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:04:59,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:59,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:04:59,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:04:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:04:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1003047124, now seen corresponding path program 1 times [2023-11-24 22:04:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:04:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542907637] [2023-11-24 22:04:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:04:59,746 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 [2023-11-24 22:04:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:04:59,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:04:59,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:04:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:04:59,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:04:59,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:04:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:59,974 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 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-24 22:04:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:04:59,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,043 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:00,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-24 22:05:00,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-24 22:05:00,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,125 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:00,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 22:05:00,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,208 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-24 22:05:00,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-24 22:05:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,268 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:00,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-24 22:05:00,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:00,307 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 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 22:05:00,370 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 22:05:00,370 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 14 treesize of output 20 [2023-11-24 22:05:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:00,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:00,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:05:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542907637] [2023-11-24 22:05:00,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542907637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571165660] [2023-11-24 22:05:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:05:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:00,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 95 [2023-11-24 22:05:00,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 498 flow. Second operand has 4 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) [2023-11-24 22:05:00,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:00,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 95 [2023-11-24 22:05:00,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:03,108 INFO L124 PetriNetUnfolderBase]: 9688/14708 cut-off events. [2023-11-24 22:05:03,109 INFO L125 PetriNetUnfolderBase]: For 151/152 co-relation queries the response was YES. [2023-11-24 22:05:03,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28379 conditions, 14708 events. 9688/14708 cut-off events. For 151/152 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 100734 event pairs, 7868 based on Foata normal form. 1601/9384 useless extension candidates. Maximal degree in co-relation 28290. Up to 13358 conditions per place. [2023-11-24 22:05:03,215 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 88 selfloop transitions, 1 changer transitions 0/117 dead transitions. [2023-11-24 22:05:03,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 117 transitions, 672 flow [2023-11-24 22:05:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-24 22:05:03,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-11-24 22:05:03,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-24 22:05:03,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-24 22:05:03,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:03,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-24 22:05:03,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:03,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:03,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:03,221 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 498 flow. Second operand 3 states and 160 transitions. [2023-11-24 22:05:03,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 117 transitions, 672 flow [2023-11-24 22:05:03,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 117 transitions, 577 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:03,228 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 401 flow [2023-11-24 22:05:03,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2023-11-24 22:05:03,231 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-11-24 22:05:03,231 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 401 flow [2023-11-24 22:05:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-11-24 22:05:03,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:03,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:05:03,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:03,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:05:03,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:05:03,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:03,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1003047125, now seen corresponding path program 1 times [2023-11-24 22:05:03,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:05:03,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828661058] [2023-11-24 22:05:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:03,436 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 [2023-11-24 22:05:03,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:05:03,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:05:03,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:03,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 22:05:03,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:03,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,636 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 5 [2023-11-24 22:05:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,656 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 [2023-11-24 22:05:03,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,691 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 [2023-11-24 22:05:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,732 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 [2023-11-24 22:05:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 22:05:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,816 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 11 treesize of output 1 [2023-11-24 22:05:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,851 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 [2023-11-24 22:05:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,902 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:05:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:03,931 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:05:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:03,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:03,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:05:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828661058] [2023-11-24 22:05:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828661058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:03,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:03,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:03,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613600387] [2023-11-24 22:05:03,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:03,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:03,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:05:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:03,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:04,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 95 [2023-11-24 22:05:04,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 401 flow. Second operand has 4 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) [2023-11-24 22:05:04,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:04,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 95 [2023-11-24 22:05:04,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:06,164 INFO L124 PetriNetUnfolderBase]: 9688/14371 cut-off events. [2023-11-24 22:05:06,164 INFO L125 PetriNetUnfolderBase]: For 131/132 co-relation queries the response was YES. [2023-11-24 22:05:06,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27997 conditions, 14371 events. 9688/14371 cut-off events. For 131/132 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 94232 event pairs, 7868 based on Foata normal form. 1601/9382 useless extension candidates. Maximal degree in co-relation 27984. Up to 13358 conditions per place. [2023-11-24 22:05:06,261 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 88 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-11-24 22:05:06,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 115 transitions, 575 flow [2023-11-24 22:05:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-24 22:05:06,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-11-24 22:05:06,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-24 22:05:06,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-24 22:05:06,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:06,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-24 22:05:06,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:06,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:06,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:06,266 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 401 flow. Second operand 3 states and 160 transitions. [2023-11-24 22:05:06,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 115 transitions, 575 flow [2023-11-24 22:05:06,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 115 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:06,271 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 398 flow [2023-11-24 22:05:06,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2023-11-24 22:05:06,272 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-11-24 22:05:06,273 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 398 flow [2023-11-24 22:05:06,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-11-24 22:05:06,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:06,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:06,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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)] Ended with exit code 0 [2023-11-24 22:05:06,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:05:06,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:05:06,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1690470452, now seen corresponding path program 1 times [2023-11-24 22:05:06,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:05:06,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724109890] [2023-11-24 22:05:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:06,477 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 [2023-11-24 22:05:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:05:06,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:05:06,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:06,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 22:05:06,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:06,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,688 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 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-24 22:05:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,736 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:06,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 22:05:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,805 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:06,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-24 22:05:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-24 22:05:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,884 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:06,885 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-24 22:05:06,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,915 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 15 treesize of output 1 [2023-11-24 22:05:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,942 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 15 treesize of output 1 [2023-11-24 22:05:06,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:06,980 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 22:05:06,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 22:05:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:07,013 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 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-24 22:05:07,059 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 22:05:07,059 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 14 treesize of output 20 [2023-11-24 22:05:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:07,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:07,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:05:07,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724109890] [2023-11-24 22:05:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724109890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:07,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:07,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166952071] [2023-11-24 22:05:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:05:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 95 [2023-11-24 22:05:07,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:07,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:07,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 95 [2023-11-24 22:05:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:09,088 INFO L124 PetriNetUnfolderBase]: 9688/14347 cut-off events. [2023-11-24 22:05:09,088 INFO L125 PetriNetUnfolderBase]: For 131/132 co-relation queries the response was YES. [2023-11-24 22:05:09,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27974 conditions, 14347 events. 9688/14347 cut-off events. For 131/132 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 93768 event pairs, 7868 based on Foata normal form. 79/7860 useless extension candidates. Maximal degree in co-relation 27960. Up to 13358 conditions per place. [2023-11-24 22:05:09,197 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 88 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-11-24 22:05:09,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 113 transitions, 572 flow [2023-11-24 22:05:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-24 22:05:09,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-11-24 22:05:09,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-24 22:05:09,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-24 22:05:09,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:09,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-24 22:05:09,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:09,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:09,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:09,203 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 398 flow. Second operand 3 states and 160 transitions. [2023-11-24 22:05:09,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 113 transitions, 572 flow [2023-11-24 22:05:09,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 571 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:09,208 INFO L231 Difference]: Finished difference. Result has 93 places, 113 transitions, 395 flow [2023-11-24 22:05:09,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=93, PETRI_TRANSITIONS=113} [2023-11-24 22:05:09,210 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-11-24 22:05:09,210 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 113 transitions, 395 flow [2023-11-24 22:05:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:09,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:09,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:09,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:09,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:05:09,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:05:09,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1690470453, now seen corresponding path program 1 times [2023-11-24 22:05:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:05:09,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463284955] [2023-11-24 22:05:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:09,422 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 [2023-11-24 22:05:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:05:09,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:05:09,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:09,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 22:05:09,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,636 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 [2023-11-24 22:05:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,651 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 [2023-11-24 22:05:09,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,679 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 [2023-11-24 22:05:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,722 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 [2023-11-24 22:05:09,735 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 22:05:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,770 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 [2023-11-24 22:05:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,815 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 [2023-11-24 22:05:09,843 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 22:05:09,849 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 22:05:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-24 22:05:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,942 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:05:09,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:09,978 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 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:05:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:10,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:10,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:05:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463284955] [2023-11-24 22:05:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463284955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:10,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:10,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024228807] [2023-11-24 22:05:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:05:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:10,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 95 [2023-11-24 22:05:10,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 113 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:10,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:10,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 95 [2023-11-24 22:05:10,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:12,520 INFO L124 PetriNetUnfolderBase]: 9688/14323 cut-off events. [2023-11-24 22:05:12,520 INFO L125 PetriNetUnfolderBase]: For 131/132 co-relation queries the response was YES. [2023-11-24 22:05:12,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27951 conditions, 14323 events. 9688/14323 cut-off events. For 131/132 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 93371 event pairs, 7868 based on Foata normal form. 79/7860 useless extension candidates. Maximal degree in co-relation 27936. Up to 13358 conditions per place. [2023-11-24 22:05:12,606 INFO L140 encePairwiseOnDemand]: 92/95 looper letters, 88 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-11-24 22:05:12,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 111 transitions, 569 flow [2023-11-24 22:05:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-24 22:05:12,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-11-24 22:05:12,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-24 22:05:12,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-24 22:05:12,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:12,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-24 22:05:12,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:12,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:12,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:12,610 INFO L175 Difference]: Start difference. First operand has 93 places, 113 transitions, 395 flow. Second operand 3 states and 160 transitions. [2023-11-24 22:05:12,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 111 transitions, 569 flow [2023-11-24 22:05:12,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 111 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:12,615 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 392 flow [2023-11-24 22:05:12,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2023-11-24 22:05:12,616 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 0 predicate places. [2023-11-24 22:05:12,617 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 392 flow [2023-11-24 22:05:12,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:12,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:12,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:12,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:12,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:05:12,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:05:12,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1044861357, now seen corresponding path program 1 times [2023-11-24 22:05:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:05:12,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288784132] [2023-11-24 22:05:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:12,821 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 [2023-11-24 22:05:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:05:12,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:05:12,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:12,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:05:12,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:12,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:12,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:05:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288784132] [2023-11-24 22:05:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288784132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:12,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:12,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:05:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198460099] [2023-11-24 22:05:12,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:05:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:12,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 95 [2023-11-24 22:05:12,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:12,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:12,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 95 [2023-11-24 22:05:12,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:14,799 INFO L124 PetriNetUnfolderBase]: 10749/15547 cut-off events. [2023-11-24 22:05:14,799 INFO L125 PetriNetUnfolderBase]: For 185/186 co-relation queries the response was YES. [2023-11-24 22:05:14,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30747 conditions, 15547 events. 10749/15547 cut-off events. For 185/186 co-relation queries the response was YES. Maximal size of possible extension queue 949. Compared 99295 event pairs, 3283 based on Foata normal form. 128/8656 useless extension candidates. Maximal degree in co-relation 30731. Up to 13227 conditions per place. [2023-11-24 22:05:14,889 INFO L140 encePairwiseOnDemand]: 89/95 looper letters, 111 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-11-24 22:05:14,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 674 flow [2023-11-24 22:05:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-11-24 22:05:14,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2023-11-24 22:05:14,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-11-24 22:05:14,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-11-24 22:05:14,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:14,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-11-24 22:05:14,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:14,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:14,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:14,894 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 392 flow. Second operand 3 states and 192 transitions. [2023-11-24 22:05:14,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 674 flow [2023-11-24 22:05:14,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 673 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:14,899 INFO L231 Difference]: Finished difference. Result has 94 places, 113 transitions, 414 flow [2023-11-24 22:05:14,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=414, PETRI_PLACES=94, PETRI_TRANSITIONS=113} [2023-11-24 22:05:14,900 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-11-24 22:05:14,901 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 113 transitions, 414 flow [2023-11-24 22:05:14,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:14,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:14,901 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 22:05:14,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:15,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 22:05:15,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-24 22:05:15,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash -862492914, now seen corresponding path program 2 times [2023-11-24 22:05:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 22:05:15,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082395323] [2023-11-24 22:05:15,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 22:05:15,108 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 [2023-11-24 22:05:15,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 22:05:15,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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) [2023-11-24 22:05:15,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51451c2e-fb0e-4694-9e08-46e45fd09c38/bin/uautomizer-verify-NlZe1sFDwI/mathsat -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 [2023-11-24 22:05:15,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 22:05:15,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:05:15,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 22:05:15,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:15,255 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 [2023-11-24 22:05:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,269 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 [2023-11-24 22:05:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,278 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 [2023-11-24 22:05:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,289 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 [2023-11-24 22:05:15,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,310 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 [2023-11-24 22:05:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,322 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 [2023-11-24 22:05:15,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,333 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 [2023-11-24 22:05:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,344 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 [2023-11-24 22:05:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,353 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 [2023-11-24 22:05:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,365 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 [2023-11-24 22:05:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,387 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 [2023-11-24 22:05:15,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,399 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 [2023-11-24 22:05:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,409 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 [2023-11-24 22:05:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,420 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 [2023-11-24 22:05:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,433 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 [2023-11-24 22:05:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,453 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 [2023-11-24 22:05:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,461 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 [2023-11-24 22:05:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,472 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 [2023-11-24 22:05:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,497 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 [2023-11-24 22:05:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,507 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 [2023-11-24 22:05:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,531 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 [2023-11-24 22:05:15,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-24 22:05:15,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,576 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 [2023-11-24 22:05:15,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:05:15,597 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 [2023-11-24 22:05:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:15,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:16,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 22:05:16,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082395323] [2023-11-24 22:05:16,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082395323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:16,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:05:16,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 22:05:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904845944] [2023-11-24 22:05:16,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:16,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 22:05:16,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 22:05:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 22:05:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182