./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:38:55,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:38:55,380 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:38:55,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:38:55,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:38:55,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:38:55,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:38:55,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:38:55,449 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:38:55,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:38:55,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:38:55,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:38:55,455 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:38:55,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:38:55,458 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:38:55,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:38:55,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:38:55,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:38:55,460 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:38:55,461 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:38:55,461 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:38:55,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:38:55,462 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:38:55,462 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:38:55,463 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:38:55,463 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:38:55,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:38:55,465 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:38:55,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:38:55,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:38:55,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:38:55,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:38:55,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:38:55,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:38:55,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:38:55,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:38:55,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:38:55,469 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:38:55,469 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_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2023-11-06 22:38:55,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:38:55,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:38:55,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:38:55,782 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:38:55,782 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:38:55,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-06 22:38:59,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:38:59,325 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:38:59,325 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-06 22:38:59,338 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data/e9ccec055/97d8699ef836463cb76e0e6ce9642adb/FLAG76753c5a4 [2023-11-06 22:38:59,357 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data/e9ccec055/97d8699ef836463cb76e0e6ce9642adb [2023-11-06 22:38:59,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:38:59,368 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:38:59,374 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:38:59,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:38:59,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:38:59,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:59" (1/1) ... [2023-11-06 22:38:59,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f139555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:59, skipping insertion in model container [2023-11-06 22:38:59,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:59" (1/1) ... [2023-11-06 22:38:59,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:38:59,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:38:59,736 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-06 22:38:59,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@687c974b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:59, skipping insertion in model container [2023-11-06 22:38:59,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:38:59,738 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:38:59,740 INFO L158 Benchmark]: Toolchain (without parser) took 371.53ms. Allocated memory is still 157.3MB. Free memory was 118.0MB in the beginning and 107.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:38:59,741 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 157.3MB. Free memory was 104.2MB in the beginning and 104.1MB in the end (delta: 22.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:38:59,742 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.48ms. Allocated memory is still 157.3MB. Free memory was 117.4MB in the beginning and 107.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:38:59,744 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 157.3MB. Free memory was 104.2MB in the beginning and 104.1MB in the end (delta: 22.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 364.48ms. Allocated memory is still 157.3MB. Free memory was 117.4MB in the beginning and 107.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 171]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:39:02,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:39:02,395 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:39:02,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:39:02,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:39:02,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:39:02,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:39:02,462 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:39:02,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:39:02,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:39:02,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:39:02,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:39:02,471 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:39:02,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:39:02,473 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:39:02,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:39:02,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:39:02,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:39:02,475 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:39:02,477 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:39:02,477 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:39:02,478 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:39:02,478 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:39:02,479 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:39:02,479 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:39:02,480 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:39:02,480 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:39:02,480 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:39:02,481 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:39:02,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:39:02,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:39:02,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:39:02,484 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:39:02,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:39:02,485 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:39:02,485 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:39:02,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:39:02,486 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:39:02,486 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:39:02,487 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:39:02,488 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:39:02,488 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_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2023-11-06 22:39:02,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:39:02,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:39:02,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:39:02,922 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:39:02,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:39:02,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-06 22:39:06,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:39:06,408 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:39:06,410 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-06 22:39:06,423 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data/383ce74fa/88b7de819a494fbc9595bf0eb6bcc046/FLAGec8575d64 [2023-11-06 22:39:06,449 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/data/383ce74fa/88b7de819a494fbc9595bf0eb6bcc046 [2023-11-06 22:39:06,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:39:06,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:39:06,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:39:06,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:39:06,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:39:06,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:06,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba91cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06, skipping insertion in model container [2023-11-06 22:39:06,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:06,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:39:06,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:06,797 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:39:06,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:39:06,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:06,852 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:39:06,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:39:06,944 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:39:06,946 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:39:06,954 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:39:06,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06 WrapperNode [2023-11-06 22:39:06,955 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:39:06,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:39:06,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:39:06,957 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:39:06,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:06,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,062 INFO L138 Inliner]: procedures = 27, calls = 69, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 343 [2023-11-06 22:39:07,070 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:39:07,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:39:07,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:39:07,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:39:07,083 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,126 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:39:07,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:39:07,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:39:07,174 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:39:07,175 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (1/1) ... [2023-11-06 22:39:07,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:39:07,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:07,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:39:07,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:39:07,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:39:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:39:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:39:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:39:07,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:39:07,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:39:07,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:39:07,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:39:07,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:39:07,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:39:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:39:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:39:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:39:07,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:39:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:39:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:39:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:39:07,268 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:39:07,408 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:39:07,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:39:08,431 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:39:08,735 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:39:08,735 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:39:08,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:08 BoogieIcfgContainer [2023-11-06 22:39:08,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:39:08,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:39:08,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:39:08,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:39:08,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:39:06" (1/3) ... [2023-11-06 22:39:08,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eadad3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:08, skipping insertion in model container [2023-11-06 22:39:08,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:06" (2/3) ... [2023-11-06 22:39:08,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eadad3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:39:08, skipping insertion in model container [2023-11-06 22:39:08,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:39:08" (3/3) ... [2023-11-06 22:39:08,754 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-11-06 22:39:08,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:39:08,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-11-06 22:39:08,776 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:39:08,915 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:39:08,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 316 transitions, 653 flow [2023-11-06 22:39:09,170 INFO L124 PetriNetUnfolderBase]: 27/313 cut-off events. [2023-11-06 22:39:09,171 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:39:09,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 313 events. 27/313 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 255. Up to 6 conditions per place. [2023-11-06 22:39:09,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 316 transitions, 653 flow [2023-11-06 22:39:09,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 308 transitions, 634 flow [2023-11-06 22:39:09,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:39:09,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 308 transitions, 634 flow [2023-11-06 22:39:09,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 308 transitions, 634 flow [2023-11-06 22:39:09,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 308 transitions, 634 flow [2023-11-06 22:39:09,284 INFO L124 PetriNetUnfolderBase]: 27/308 cut-off events. [2023-11-06 22:39:09,285 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:39:09,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 27/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 255. Up to 6 conditions per place. [2023-11-06 22:39:09,293 INFO L119 LiptonReduction]: Number of co-enabled transitions 5028 [2023-11-06 22:39:55,741 INFO L134 LiptonReduction]: Checked pairs total: 6696 [2023-11-06 22:39:55,742 INFO L136 LiptonReduction]: Total number of compositions: 378 [2023-11-06 22:39:55,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:39:55,771 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;@4164fe4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:39:55,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-11-06 22:39:55,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:39:55,775 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:39:55,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:39:55,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:55,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:39:55,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:39:55,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash 49775, now seen corresponding path program 1 times [2023-11-06 22:39:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:39:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570862538] [2023-11-06 22:39:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:39:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:39:55,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:39:55,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:39:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:55,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:39:55,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:56,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-06 22:39:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:39:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,115 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:39:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:39:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,228 INFO L351 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 [2023-11-06 22:39:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:39:56,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:39:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:39:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:39:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:39:56,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:39:56,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:39:56,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:39:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:56,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:39:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:56,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:39:56,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:39:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570862538] [2023-11-06 22:39:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570862538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:39:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:39:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:39:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175355076] [2023-11-06 22:39:56,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:39:56,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:39:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:39:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:39:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:39:56,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 694 [2023-11-06 22:39:56,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:56,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:56,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 694 [2023-11-06 22:39:56,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:58,954 INFO L124 PetriNetUnfolderBase]: 4796/6695 cut-off events. [2023-11-06 22:39:58,955 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2023-11-06 22:39:58,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13580 conditions, 6695 events. 4796/6695 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 33704 event pairs, 4049 based on Foata normal form. 0/1335 useless extension candidates. Maximal degree in co-relation 12540. Up to 6687 conditions per place. [2023-11-06 22:39:59,040 INFO L140 encePairwiseOnDemand]: 686/694 looper letters, 52 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-11-06 22:39:59,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 242 flow [2023-11-06 22:39:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:39:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:39:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2023-11-06 22:39:59,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39481268011527376 [2023-11-06 22:39:59,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2023-11-06 22:39:59,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2023-11-06 22:39:59,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:59,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2023-11-06 22:39:59,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:59,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:59,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:59,103 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 138 flow. Second operand 3 states and 822 transitions. [2023-11-06 22:39:59,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 242 flow [2023-11-06 22:39:59,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:39:59,122 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 126 flow [2023-11-06 22:39:59,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-11-06 22:39:59,128 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -8 predicate places. [2023-11-06 22:39:59,129 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 126 flow [2023-11-06 22:39:59,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:59,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:59,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:39:59,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:59,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:39:59,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:39:59,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 49773, now seen corresponding path program 1 times [2023-11-06 22:39:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:39:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327522753] [2023-11-06 22:39:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:59,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:39:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:39:59,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:39:59,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:39:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:59,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:39:59,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:59,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 22:39:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:39:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,591 INFO L351 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 [2023-11-06 22:39:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:39:59,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:39:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:39:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,707 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:39:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:39:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:39:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:39:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:39:59,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:39:59,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:39:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:59,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:39:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:59,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:39:59,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:39:59,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327522753] [2023-11-06 22:39:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327522753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:39:59,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:39:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:39:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262008451] [2023-11-06 22:39:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:39:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:39:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:39:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:39:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:00,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 694 [2023-11-06 22:40:00,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:00,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 694 [2023-11-06 22:40:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:02,002 INFO L124 PetriNetUnfolderBase]: 4801/6703 cut-off events. [2023-11-06 22:40:02,002 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:40:02,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13487 conditions, 6703 events. 4801/6703 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 33375 event pairs, 4049 based on Foata normal form. 0/1340 useless extension candidates. Maximal degree in co-relation 13437. Up to 6699 conditions per place. [2023-11-06 22:40:02,054 INFO L140 encePairwiseOnDemand]: 682/694 looper letters, 55 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2023-11-06 22:40:02,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 276 flow [2023-11-06 22:40:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-11-06 22:40:02,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39385206532180594 [2023-11-06 22:40:02,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-11-06 22:40:02,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-11-06 22:40:02,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:02,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-11-06 22:40:02,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:02,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:02,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:02,070 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 126 flow. Second operand 3 states and 820 transitions. [2023-11-06 22:40:02,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 276 flow [2023-11-06 22:40:02,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:40:02,074 INFO L231 Difference]: Finished difference. Result has 58 places, 64 transitions, 192 flow [2023-11-06 22:40:02,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=58, PETRI_TRANSITIONS=64} [2023-11-06 22:40:02,075 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -6 predicate places. [2023-11-06 22:40:02,075 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 64 transitions, 192 flow [2023-11-06 22:40:02,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:02,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:40:02,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:02,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:02,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:02,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:02,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1549057, now seen corresponding path program 1 times [2023-11-06 22:40:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:02,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976693634] [2023-11-06 22:40:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:02,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:02,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:40:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:02,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:40:02,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:02,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:40:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:02,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,681 INFO L351 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 [2023-11-06 22:40:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:02,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:02,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:03,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:03,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976693634] [2023-11-06 22:40:03,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976693634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:03,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:40:03,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:40:03,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990883591] [2023-11-06 22:40:03,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:03,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:40:03,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:03,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:40:03,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:40:04,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 694 [2023-11-06 22:40:04,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 64 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:04,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:04,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 694 [2023-11-06 22:40:04,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:08,363 INFO L124 PetriNetUnfolderBase]: 4816/6727 cut-off events. [2023-11-06 22:40:08,363 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:40:08,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13588 conditions, 6727 events. 4816/6727 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 33493 event pairs, 4049 based on Foata normal form. 0/1357 useless extension candidates. Maximal degree in co-relation 13437. Up to 6708 conditions per place. [2023-11-06 22:40:08,403 INFO L140 encePairwiseOnDemand]: 682/694 looper letters, 55 selfloop transitions, 33 changer transitions 0/88 dead transitions. [2023-11-06 22:40:08,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 476 flow [2023-11-06 22:40:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:40:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:40:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1513 transitions. [2023-11-06 22:40:08,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633525456292027 [2023-11-06 22:40:08,412 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1513 transitions. [2023-11-06 22:40:08,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1513 transitions. [2023-11-06 22:40:08,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:08,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1513 transitions. [2023-11-06 22:40:08,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.16666666666666) internal successors, (1513), 6 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 694.0) internal successors, (4858), 7 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,433 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 694.0) internal successors, (4858), 7 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,433 INFO L175 Difference]: Start difference. First operand has 58 places, 64 transitions, 192 flow. Second operand 6 states and 1513 transitions. [2023-11-06 22:40:08,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 476 flow [2023-11-06 22:40:08,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:40:08,437 INFO L231 Difference]: Finished difference. Result has 64 places, 88 transitions, 399 flow [2023-11-06 22:40:08,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=64, PETRI_TRANSITIONS=88} [2023-11-06 22:40:08,439 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-06 22:40:08,439 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 88 transitions, 399 flow [2023-11-06 22:40:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:08,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:40:08,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:08,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:08,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash 48083537, now seen corresponding path program 1 times [2023-11-06 22:40:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739518760] [2023-11-06 22:40:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:08,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:08,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:08,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:08,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:40:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:08,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:40:08,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-06 22:40:08,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,878 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:08,878 INFO L351 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 [2023-11-06 22:40:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,919 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:08,920 INFO L351 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 [2023-11-06 22:40:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,945 INFO L351 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 [2023-11-06 22:40:08,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:08,997 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:08,997 INFO L351 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 [2023-11-06 22:40:09,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:09,060 INFO L322 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-06 22:40:09,061 INFO L351 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 [2023-11-06 22:40:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:09,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 22:40:09,152 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:40:09,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:40:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:09,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:09,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739518760] [2023-11-06 22:40:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739518760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:09,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:09,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:40:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882136422] [2023-11-06 22:40:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:09,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:40:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:40:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:40:09,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 694 [2023-11-06 22:40:09,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 88 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:09,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:09,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 694 [2023-11-06 22:40:09,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:10,831 INFO L124 PetriNetUnfolderBase]: 3732/5282 cut-off events. [2023-11-06 22:40:10,832 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-06 22:40:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10745 conditions, 5282 events. 3732/5282 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 25894 event pairs, 3125 based on Foata normal form. 0/1203 useless extension candidates. Maximal degree in co-relation 10642. Up to 5282 conditions per place. [2023-11-06 22:40:10,869 INFO L140 encePairwiseOnDemand]: 691/694 looper letters, 81 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-11-06 22:40:10,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 528 flow [2023-11-06 22:40:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2023-11-06 22:40:10,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058597502401537 [2023-11-06 22:40:10,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2023-11-06 22:40:10,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2023-11-06 22:40:10,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:10,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2023-11-06 22:40:10,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,886 INFO L175 Difference]: Start difference. First operand has 64 places, 88 transitions, 399 flow. Second operand 3 states and 845 transitions. [2023-11-06 22:40:10,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 528 flow [2023-11-06 22:40:10,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 484 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:10,894 INFO L231 Difference]: Finished difference. Result has 63 places, 82 transitions, 322 flow [2023-11-06 22:40:10,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=63, PETRI_TRANSITIONS=82} [2023-11-06 22:40:10,897 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2023-11-06 22:40:10,897 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 82 transitions, 322 flow [2023-11-06 22:40:10,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:10,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:10,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:40:10,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:11,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:11,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:11,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1490589454, now seen corresponding path program 1 times [2023-11-06 22:40:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:11,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882067691] [2023-11-06 22:40:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:11,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:11,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:40:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:11,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:40:11,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,396 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:40:11,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:40:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-06 22:40:11,470 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:40:11,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:40:11,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,507 INFO L322 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-11-06 22:40:11,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 1 [2023-11-06 22:40:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:11,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:40:11,631 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:40:11,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:40:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:11,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:12,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882067691] [2023-11-06 22:40:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882067691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:12,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:40:12,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:40:12,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869842396] [2023-11-06 22:40:12,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:40:12,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:40:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:40:15,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:40:17,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 694 [2023-11-06 22:40:17,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 82 transitions, 322 flow. Second operand has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:17,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:17,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 694 [2023-11-06 22:40:17,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:18,915 INFO L124 PetriNetUnfolderBase]: 2648/3837 cut-off events. [2023-11-06 22:40:18,915 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-06 22:40:18,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7823 conditions, 3837 events. 2648/3837 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 18238 event pairs, 2201 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 7811. Up to 3823 conditions per place. [2023-11-06 22:40:18,940 INFO L140 encePairwiseOnDemand]: 685/694 looper letters, 59 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2023-11-06 22:40:18,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 446 flow [2023-11-06 22:40:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:40:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:40:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1238 transitions. [2023-11-06 22:40:18,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567723342939481 [2023-11-06 22:40:18,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1238 transitions. [2023-11-06 22:40:18,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1238 transitions. [2023-11-06 22:40:18,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:18,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1238 transitions. [2023-11-06 22:40:18,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 247.6) internal successors, (1238), 5 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:18,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:18,966 INFO L175 Difference]: Start difference. First operand has 63 places, 82 transitions, 322 flow. Second operand 5 states and 1238 transitions. [2023-11-06 22:40:18,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 446 flow [2023-11-06 22:40:18,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:18,971 INFO L231 Difference]: Finished difference. Result has 64 places, 76 transitions, 327 flow [2023-11-06 22:40:18,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=64, PETRI_TRANSITIONS=76} [2023-11-06 22:40:18,972 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-06 22:40:18,972 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 76 transitions, 327 flow [2023-11-06 22:40:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:18,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:18,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:40:18,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:19,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:19,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:19,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1036325111, now seen corresponding path program 1 times [2023-11-06 22:40:19,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:19,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524312494] [2023-11-06 22:40:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:19,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:19,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:19,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:40:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:19,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:40:19,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:19,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:19,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:19,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524312494] [2023-11-06 22:40:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524312494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:19,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:19,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:40:19,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379302983] [2023-11-06 22:40:19,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:19,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:19,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:19,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:19,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 694 [2023-11-06 22:40:19,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 76 transitions, 327 flow. Second operand has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:19,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:19,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 694 [2023-11-06 22:40:19,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:20,858 INFO L124 PetriNetUnfolderBase]: 3624/5183 cut-off events. [2023-11-06 22:40:20,858 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-06 22:40:20,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 5183 events. 3624/5183 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 27151 event pairs, 977 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 10533. Up to 3239 conditions per place. [2023-11-06 22:40:20,883 INFO L140 encePairwiseOnDemand]: 684/694 looper letters, 107 selfloop transitions, 4 changer transitions 0/111 dead transitions. [2023-11-06 22:40:20,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 624 flow [2023-11-06 22:40:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2023-11-06 22:40:20,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42795389048991356 [2023-11-06 22:40:20,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2023-11-06 22:40:20,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2023-11-06 22:40:20,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:20,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2023-11-06 22:40:20,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:20,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:20,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:20,897 INFO L175 Difference]: Start difference. First operand has 64 places, 76 transitions, 327 flow. Second operand 3 states and 891 transitions. [2023-11-06 22:40:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 624 flow [2023-11-06 22:40:20,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 601 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:40:20,902 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 344 flow [2023-11-06 22:40:20,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2023-11-06 22:40:20,903 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-11-06 22:40:20,903 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 344 flow [2023-11-06 22:40:20,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:20,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:20,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:40:20,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:21,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:21,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:21,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1036325166, now seen corresponding path program 1 times [2023-11-06 22:40:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650770363] [2023-11-06 22:40:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:21,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:21,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:40:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:21,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:40:21,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:21,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:21,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:21,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650770363] [2023-11-06 22:40:21,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650770363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:21,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:21,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:40:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058604216] [2023-11-06 22:40:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:21,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:21,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 694 [2023-11-06 22:40:21,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:21,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:21,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 694 [2023-11-06 22:40:21,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:23,461 INFO L124 PetriNetUnfolderBase]: 6048/8699 cut-off events. [2023-11-06 22:40:23,461 INFO L125 PetriNetUnfolderBase]: For 1694/1694 co-relation queries the response was YES. [2023-11-06 22:40:23,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19753 conditions, 8699 events. 6048/8699 cut-off events. For 1694/1694 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 48979 event pairs, 2357 based on Foata normal form. 200/3297 useless extension candidates. Maximal degree in co-relation 19738. Up to 5373 conditions per place. [2023-11-06 22:40:23,512 INFO L140 encePairwiseOnDemand]: 687/694 looper letters, 110 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-11-06 22:40:23,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 113 transitions, 656 flow [2023-11-06 22:40:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2023-11-06 22:40:23,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289145052833814 [2023-11-06 22:40:23,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2023-11-06 22:40:23,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2023-11-06 22:40:23,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:23,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2023-11-06 22:40:23,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:23,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:23,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:23,527 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 344 flow. Second operand 3 states and 893 transitions. [2023-11-06 22:40:23,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 113 transitions, 656 flow [2023-11-06 22:40:23,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 113 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:40:23,544 INFO L231 Difference]: Finished difference. Result has 66 places, 81 transitions, 365 flow [2023-11-06 22:40:23,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=66, PETRI_TRANSITIONS=81} [2023-11-06 22:40:23,545 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-11-06 22:40:23,545 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 81 transitions, 365 flow [2023-11-06 22:40:23,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:23,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:23,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:40:23,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:23,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:23,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:23,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1036325171, now seen corresponding path program 1 times [2023-11-06 22:40:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:23,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488855700] [2023-11-06 22:40:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:23,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:23,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:40:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:23,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:40:23,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:23,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:23,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:23,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:40:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:23,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:40:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:40:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:40:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:40:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:40:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,192 INFO L351 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 [2023-11-06 22:40:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:40:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:40:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:24,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:40:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:24,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:24,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:24,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488855700] [2023-11-06 22:40:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488855700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:24,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:24,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:40:24,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148002938] [2023-11-06 22:40:24,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:24,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:40:24,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:40:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:40:24,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 694 [2023-11-06 22:40:24,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:24,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:24,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 694 [2023-11-06 22:40:24,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:26,342 INFO L124 PetriNetUnfolderBase]: 5752/8251 cut-off events. [2023-11-06 22:40:26,343 INFO L125 PetriNetUnfolderBase]: For 1621/1621 co-relation queries the response was YES. [2023-11-06 22:40:26,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20064 conditions, 8251 events. 5752/8251 cut-off events. For 1621/1621 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 43971 event pairs, 4794 based on Foata normal form. 0/3765 useless extension candidates. Maximal degree in co-relation 20048. Up to 8251 conditions per place. [2023-11-06 22:40:26,386 INFO L140 encePairwiseOnDemand]: 691/694 looper letters, 78 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-06 22:40:26,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 519 flow [2023-11-06 22:40:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-11-06 22:40:26,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40393852065321806 [2023-11-06 22:40:26,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-11-06 22:40:26,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-11-06 22:40:26,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:26,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-11-06 22:40:26,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:26,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:26,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:26,399 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 365 flow. Second operand 3 states and 841 transitions. [2023-11-06 22:40:26,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 519 flow [2023-11-06 22:40:26,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:26,404 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 360 flow [2023-11-06 22:40:26,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2023-11-06 22:40:26,405 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-11-06 22:40:26,405 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 360 flow [2023-11-06 22:40:26,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:26,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:26,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:40:26,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-06 22:40:26,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:26,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:26,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1036325173, now seen corresponding path program 1 times [2023-11-06 22:40:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:26,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805138875] [2023-11-06 22:40:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:26,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:26,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:26,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 22:40:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:26,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:40:26,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:26,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,797 INFO L351 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 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-06 22:40:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,860 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:26,861 INFO L351 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 [2023-11-06 22:40:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:40:26,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,924 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:26,924 INFO L351 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 [2023-11-06 22:40:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,967 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:26,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 22:40:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:26,993 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:40:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:27,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:27,036 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:40:27,037 INFO L351 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 [2023-11-06 22:40:27,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:27,062 INFO L351 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 [2023-11-06 22:40:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:27,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 22:40:27,149 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:40:27,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:40:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:27,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:40:27,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:27,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805138875] [2023-11-06 22:40:27,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805138875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:27,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:27,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:40:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374993976] [2023-11-06 22:40:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:27,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:40:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:40:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:40:27,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 694 [2023-11-06 22:40:27,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 360 flow. Second operand has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:27,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:27,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 694 [2023-11-06 22:40:27,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:29,034 INFO L124 PetriNetUnfolderBase]: 5456/7803 cut-off events. [2023-11-06 22:40:29,035 INFO L125 PetriNetUnfolderBase]: For 1571/1571 co-relation queries the response was YES. [2023-11-06 22:40:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18811 conditions, 7803 events. 5456/7803 cut-off events. For 1571/1571 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 41135 event pairs, 4535 based on Foata normal form. 0/3665 useless extension candidates. Maximal degree in co-relation 18794. Up to 7803 conditions per place. [2023-11-06 22:40:29,073 INFO L140 encePairwiseOnDemand]: 691/694 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-06 22:40:29,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 510 flow [2023-11-06 22:40:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2023-11-06 22:40:29,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40297790585975024 [2023-11-06 22:40:29,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2023-11-06 22:40:29,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2023-11-06 22:40:29,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:29,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2023-11-06 22:40:29,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:29,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:29,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:29,086 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 360 flow. Second operand 3 states and 839 transitions. [2023-11-06 22:40:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 510 flow [2023-11-06 22:40:29,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:29,091 INFO L231 Difference]: Finished difference. Result has 64 places, 77 transitions, 357 flow [2023-11-06 22:40:29,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=64, PETRI_TRANSITIONS=77} [2023-11-06 22:40:29,092 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2023-11-06 22:40:29,092 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 77 transitions, 357 flow [2023-11-06 22:40:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 264.5) internal successors, (1058), 4 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:29,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:29,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:40:29,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:29,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:29,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:40:29,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:29,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1090631827, now seen corresponding path program 2 times [2023-11-06 22:40:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:40:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072279315] [2023-11-06 22:40:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:40:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:40:29,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:40:29,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:40:29,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:29,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:29,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:40:29,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:29,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:40:29,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,638 INFO L351 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 [2023-11-06 22:40:29,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:29,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,718 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:29,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:40:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:40:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:40:29,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:40:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:30,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:30,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:40:30,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072279315] [2023-11-06 22:40:30,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072279315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:30,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:40:30,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:40:30,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558515985] [2023-11-06 22:40:30,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:40:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:40:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:40:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:40:37,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 694 [2023-11-06 22:40:37,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 77 transitions, 357 flow. Second operand has 12 states, 12 states have (on average 240.0) internal successors, (2880), 12 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:37,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:37,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 694 [2023-11-06 22:40:37,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:40,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:42,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:44,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:46,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:48,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:50,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:52,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:54,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:57,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:40:59,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:01,350 INFO L124 PetriNetUnfolderBase]: 5472/7837 cut-off events. [2023-11-06 22:41:01,351 INFO L125 PetriNetUnfolderBase]: For 1619/1619 co-relation queries the response was YES. [2023-11-06 22:41:01,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18942 conditions, 7837 events. 5472/7837 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 41424 event pairs, 4535 based on Foata normal form. 14/3707 useless extension candidates. Maximal degree in co-relation 18924. Up to 7790 conditions per place. [2023-11-06 22:41:01,396 INFO L140 encePairwiseOnDemand]: 684/694 looper letters, 54 selfloop transitions, 57 changer transitions 0/111 dead transitions. [2023-11-06 22:41:01,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 791 flow [2023-11-06 22:41:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:41:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:41:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3705 transitions. [2023-11-06 22:41:01,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3559077809798271 [2023-11-06 22:41:01,412 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3705 transitions. [2023-11-06 22:41:01,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3705 transitions. [2023-11-06 22:41:01,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:01,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3705 transitions. [2023-11-06 22:41:01,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 247.0) internal successors, (3705), 15 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:01,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 694.0) internal successors, (11104), 16 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:01,446 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 694.0) internal successors, (11104), 16 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:01,446 INFO L175 Difference]: Start difference. First operand has 64 places, 77 transitions, 357 flow. Second operand 15 states and 3705 transitions. [2023-11-06 22:41:01,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 791 flow [2023-11-06 22:41:01,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 111 transitions, 790 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:01,453 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 740 flow [2023-11-06 22:41:01,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=740, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2023-11-06 22:41:01,455 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 20 predicate places. [2023-11-06 22:41:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 740 flow [2023-11-06 22:41:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 240.0) internal successors, (2880), 12 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:01,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:01,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:01,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:01,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2061305102, now seen corresponding path program 1 times [2023-11-06 22:41:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:01,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554974824] [2023-11-06 22:41:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:01,670 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:01,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:41:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:01,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:41:01,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:01,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:01,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:01,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554974824] [2023-11-06 22:41:01,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554974824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:01,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854496781] [2023-11-06 22:41:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:01,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:01,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 694 [2023-11-06 22:41:01,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 740 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:01,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:01,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 694 [2023-11-06 22:41:01,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:03,274 INFO L124 PetriNetUnfolderBase]: 3826/5505 cut-off events. [2023-11-06 22:41:03,275 INFO L125 PetriNetUnfolderBase]: For 1288/1288 co-relation queries the response was YES. [2023-11-06 22:41:03,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13570 conditions, 5505 events. 3826/5505 cut-off events. For 1288/1288 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 28967 event pairs, 1307 based on Foata normal form. 98/2723 useless extension candidates. Maximal degree in co-relation 13544. Up to 4697 conditions per place. [2023-11-06 22:41:03,308 INFO L140 encePairwiseOnDemand]: 690/694 looper letters, 130 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2023-11-06 22:41:03,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 133 transitions, 1058 flow [2023-11-06 22:41:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 870 transitions. [2023-11-06 22:41:03,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41786743515850144 [2023-11-06 22:41:03,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 870 transitions. [2023-11-06 22:41:03,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 870 transitions. [2023-11-06 22:41:03,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:03,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 870 transitions. [2023-11-06 22:41:03,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,322 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 740 flow. Second operand 3 states and 870 transitions. [2023-11-06 22:41:03,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 133 transitions, 1058 flow [2023-11-06 22:41:03,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 133 transitions, 894 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-11-06 22:41:03,334 INFO L231 Difference]: Finished difference. Result has 82 places, 109 transitions, 587 flow [2023-11-06 22:41:03,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=587, PETRI_PLACES=82, PETRI_TRANSITIONS=109} [2023-11-06 22:41:03,335 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 18 predicate places. [2023-11-06 22:41:03,335 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 109 transitions, 587 flow [2023-11-06 22:41:03,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:03,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:03,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:03,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:03,549 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:03,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash 523959478, now seen corresponding path program 1 times [2023-11-06 22:41:03,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:03,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587017853] [2023-11-06 22:41:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:03,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:03,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:03,551 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:03,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:41:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:03,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:41:03,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:03,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:41:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:41:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:41:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:41:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:41:03,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,839 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:41:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:41:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:41:03,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:41:03,915 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:41:03,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:41:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:41:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:03,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:41:04,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:04,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:41:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:04,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:04,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:04,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587017853] [2023-11-06 22:41:04,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587017853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:04,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:04,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:04,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929226031] [2023-11-06 22:41:04,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:04,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:04,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 694 [2023-11-06 22:41:04,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 109 transitions, 587 flow. Second operand has 5 states, 5 states have (on average 262.6) internal successors, (1313), 5 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:04,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 694 [2023-11-06 22:41:04,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:05,983 INFO L124 PetriNetUnfolderBase]: 3634/5211 cut-off events. [2023-11-06 22:41:05,983 INFO L125 PetriNetUnfolderBase]: For 1530/1530 co-relation queries the response was YES. [2023-11-06 22:41:05,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13029 conditions, 5211 events. 3634/5211 cut-off events. For 1530/1530 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 26167 event pairs, 2916 based on Foata normal form. 0/2550 useless extension candidates. Maximal degree in co-relation 13002. Up to 5211 conditions per place. [2023-11-06 22:41:06,008 INFO L140 encePairwiseOnDemand]: 691/694 looper letters, 106 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2023-11-06 22:41:06,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 797 flow [2023-11-06 22:41:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 831 transitions. [2023-11-06 22:41:06,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39913544668587897 [2023-11-06 22:41:06,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 831 transitions. [2023-11-06 22:41:06,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 831 transitions. [2023-11-06 22:41:06,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:06,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 831 transitions. [2023-11-06 22:41:06,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,019 INFO L175 Difference]: Start difference. First operand has 82 places, 109 transitions, 587 flow. Second operand 3 states and 831 transitions. [2023-11-06 22:41:06,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 797 flow [2023-11-06 22:41:06,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 791 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:41:06,031 INFO L231 Difference]: Finished difference. Result has 80 places, 107 transitions, 579 flow [2023-11-06 22:41:06,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=579, PETRI_PLACES=80, PETRI_TRANSITIONS=107} [2023-11-06 22:41:06,032 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 16 predicate places. [2023-11-06 22:41:06,032 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 107 transitions, 579 flow [2023-11-06 22:41:06,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 262.6) internal successors, (1313), 5 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:06,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:06,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:06,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:06,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:06,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash 523959477, now seen corresponding path program 1 times [2023-11-06 22:41:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:06,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894224648] [2023-11-06 22:41:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:06,247 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:06,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:41:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:06,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:41:06,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:06,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,451 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:41:06,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-06 22:41:06,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,505 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,505 INFO L351 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 [2023-11-06 22:41:06,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,536 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,537 INFO L351 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 [2023-11-06 22:41:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,571 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-06 22:41:06,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,584 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:41:06,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,597 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:41:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,635 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,636 INFO L351 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 [2023-11-06 22:41:06,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,649 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:41:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,662 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:41:06,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,697 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,698 INFO L351 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 [2023-11-06 22:41:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,713 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:41:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,727 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:41:06,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-06 22:41:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:41:06,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-06 22:41:06,805 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:41:06,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:41:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:06,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:06,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:06,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894224648] [2023-11-06 22:41:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894224648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:06,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803438890] [2023-11-06 22:41:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:06,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:41:06,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:06,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:41:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:41:07,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 694 [2023-11-06 22:41:07,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 107 transitions, 579 flow. Second operand has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:07,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 694 [2023-11-06 22:41:07,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:08,497 INFO L124 PetriNetUnfolderBase]: 3442/4917 cut-off events. [2023-11-06 22:41:08,497 INFO L125 PetriNetUnfolderBase]: For 1339/1339 co-relation queries the response was YES. [2023-11-06 22:41:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12226 conditions, 4917 events. 3442/4917 cut-off events. For 1339/1339 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 24282 event pairs, 2757 based on Foata normal form. 0/2474 useless extension candidates. Maximal degree in co-relation 12199. Up to 4917 conditions per place. [2023-11-06 22:41:08,532 INFO L140 encePairwiseOnDemand]: 691/694 looper letters, 104 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2023-11-06 22:41:08,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 105 transitions, 785 flow [2023-11-06 22:41:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-11-06 22:41:08,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952929875120077 [2023-11-06 22:41:08,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-11-06 22:41:08,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-11-06 22:41:08,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:08,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-11-06 22:41:08,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,542 INFO L175 Difference]: Start difference. First operand has 80 places, 107 transitions, 579 flow. Second operand 3 states and 823 transitions. [2023-11-06 22:41:08,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 105 transitions, 785 flow [2023-11-06 22:41:08,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 784 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:08,555 INFO L231 Difference]: Finished difference. Result has 79 places, 105 transitions, 576 flow [2023-11-06 22:41:08,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=576, PETRI_PLACES=79, PETRI_TRANSITIONS=105} [2023-11-06 22:41:08,556 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 15 predicate places. [2023-11-06 22:41:08,556 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 105 transitions, 576 flow [2023-11-06 22:41:08,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:08,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:08,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:08,769 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:08,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash 523959525, now seen corresponding path program 1 times [2023-11-06 22:41:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232864649] [2023-11-06 22:41:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:08,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:08,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:41:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:08,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:41:08,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:08,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:08,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232864649] [2023-11-06 22:41:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232864649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:08,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:41:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418396192] [2023-11-06 22:41:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:08,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:08,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 694 [2023-11-06 22:41:08,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 105 transitions, 576 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:08,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 694 [2023-11-06 22:41:08,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:10,374 INFO L124 PetriNetUnfolderBase]: 4510/6269 cut-off events. [2023-11-06 22:41:10,374 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2023-11-06 22:41:10,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15587 conditions, 6269 events. 4510/6269 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 31343 event pairs, 2095 based on Foata normal form. 0/3186 useless extension candidates. Maximal degree in co-relation 15559. Up to 3305 conditions per place. [2023-11-06 22:41:10,427 INFO L140 encePairwiseOnDemand]: 688/694 looper letters, 132 selfloop transitions, 5 changer transitions 0/137 dead transitions. [2023-11-06 22:41:10,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 960 flow [2023-11-06 22:41:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2023-11-06 22:41:10,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42219020172910665 [2023-11-06 22:41:10,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2023-11-06 22:41:10,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2023-11-06 22:41:10,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:10,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2023-11-06 22:41:10,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,439 INFO L175 Difference]: Start difference. First operand has 79 places, 105 transitions, 576 flow. Second operand 3 states and 879 transitions. [2023-11-06 22:41:10,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 960 flow [2023-11-06 22:41:10,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 137 transitions, 959 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:10,450 INFO L231 Difference]: Finished difference. Result has 82 places, 108 transitions, 613 flow [2023-11-06 22:41:10,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=108} [2023-11-06 22:41:10,451 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 18 predicate places. [2023-11-06 22:41:10,451 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 108 transitions, 613 flow [2023-11-06 22:41:10,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:10,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:10,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:10,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:10,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash 523959474, now seen corresponding path program 1 times [2023-11-06 22:41:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40646855] [2023-11-06 22:41:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:10,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:10,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:10,657 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:10,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:41:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:10,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:41:10,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:10,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:10,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:10,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40646855] [2023-11-06 22:41:10,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40646855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:10,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311032778] [2023-11-06 22:41:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:10,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:10,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 694 [2023-11-06 22:41:10,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 108 transitions, 613 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:10,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 694 [2023-11-06 22:41:10,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:12,262 INFO L124 PetriNetUnfolderBase]: 4274/6033 cut-off events. [2023-11-06 22:41:12,262 INFO L125 PetriNetUnfolderBase]: For 3759/3759 co-relation queries the response was YES. [2023-11-06 22:41:12,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16986 conditions, 6033 events. 4274/6033 cut-off events. For 3759/3759 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 30264 event pairs, 1127 based on Foata normal form. 168/3826 useless extension candidates. Maximal degree in co-relation 16955. Up to 4405 conditions per place. [2023-11-06 22:41:12,309 INFO L140 encePairwiseOnDemand]: 690/694 looper letters, 127 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2023-11-06 22:41:12,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 933 flow [2023-11-06 22:41:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-11-06 22:41:12,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41930835734870314 [2023-11-06 22:41:12,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-11-06 22:41:12,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-11-06 22:41:12,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:12,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-11-06 22:41:12,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:12,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:12,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:12,320 INFO L175 Difference]: Start difference. First operand has 82 places, 108 transitions, 613 flow. Second operand 3 states and 873 transitions. [2023-11-06 22:41:12,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 933 flow [2023-11-06 22:41:12,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 921 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:41:12,333 INFO L231 Difference]: Finished difference. Result has 83 places, 108 transitions, 617 flow [2023-11-06 22:41:12,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=617, PETRI_PLACES=83, PETRI_TRANSITIONS=108} [2023-11-06 22:41:12,334 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 19 predicate places. [2023-11-06 22:41:12,335 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 108 transitions, 617 flow [2023-11-06 22:41:12,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:12,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:12,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:12,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:12,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:12,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:12,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash -937121356, now seen corresponding path program 1 times [2023-11-06 22:41:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:12,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607864064] [2023-11-06 22:41:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:12,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:12,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:12,549 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:12,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:41:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:12,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:41:12,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:12,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:12,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607864064] [2023-11-06 22:41:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607864064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:12,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585908846] [2023-11-06 22:41:12,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:12,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:41:12,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:41:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:41:12,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 694 [2023-11-06 22:41:12,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 108 transitions, 617 flow. Second operand has 4 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:12,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:12,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 694 [2023-11-06 22:41:12,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:14,081 INFO L124 PetriNetUnfolderBase]: 3282/4635 cut-off events. [2023-11-06 22:41:14,081 INFO L125 PetriNetUnfolderBase]: For 1735/1735 co-relation queries the response was YES. [2023-11-06 22:41:14,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12989 conditions, 4635 events. 3282/4635 cut-off events. For 1735/1735 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 22553 event pairs, 565 based on Foata normal form. 100/2776 useless extension candidates. Maximal degree in co-relation 12957. Up to 2006 conditions per place. [2023-11-06 22:41:14,108 INFO L140 encePairwiseOnDemand]: 689/694 looper letters, 141 selfloop transitions, 5 changer transitions 0/146 dead transitions. [2023-11-06 22:41:14,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 146 transitions, 1016 flow [2023-11-06 22:41:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:41:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:41:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1146 transitions. [2023-11-06 22:41:14,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128242074927954 [2023-11-06 22:41:14,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1146 transitions. [2023-11-06 22:41:14,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1146 transitions. [2023-11-06 22:41:14,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:14,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1146 transitions. [2023-11-06 22:41:14,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,119 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,119 INFO L175 Difference]: Start difference. First operand has 83 places, 108 transitions, 617 flow. Second operand 4 states and 1146 transitions. [2023-11-06 22:41:14,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 146 transitions, 1016 flow [2023-11-06 22:41:14,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 1010 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:14,135 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 614 flow [2023-11-06 22:41:14,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=614, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2023-11-06 22:41:14,136 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 21 predicate places. [2023-11-06 22:41:14,136 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 614 flow [2023-11-06 22:41:14,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 266.25) internal successors, (1065), 4 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:14,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:14,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:14,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:14,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1013919876, now seen corresponding path program 1 times [2023-11-06 22:41:14,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:14,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103379628] [2023-11-06 22:41:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:14,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:14,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:41:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:14,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:41:14,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:14,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:14,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:14,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103379628] [2023-11-06 22:41:14,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103379628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:14,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:14,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:14,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136859119] [2023-11-06 22:41:14,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:14,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:41:14,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:41:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:41:14,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 694 [2023-11-06 22:41:14,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 614 flow. Second operand has 4 states, 4 states have (on average 254.5) internal successors, (1018), 4 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:14,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:14,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 694 [2023-11-06 22:41:14,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:16,398 INFO L124 PetriNetUnfolderBase]: 4432/6294 cut-off events. [2023-11-06 22:41:16,398 INFO L125 PetriNetUnfolderBase]: For 2949/2949 co-relation queries the response was YES. [2023-11-06 22:41:16,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17722 conditions, 6294 events. 4432/6294 cut-off events. For 2949/2949 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 31863 event pairs, 3370 based on Foata normal form. 120/3916 useless extension candidates. Maximal degree in co-relation 17689. Up to 4634 conditions per place. [2023-11-06 22:41:16,441 INFO L140 encePairwiseOnDemand]: 683/694 looper letters, 177 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2023-11-06 22:41:16,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 180 transitions, 1363 flow [2023-11-06 22:41:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:41:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:41:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1094 transitions. [2023-11-06 22:41:16,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3940922190201729 [2023-11-06 22:41:16,445 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1094 transitions. [2023-11-06 22:41:16,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1094 transitions. [2023-11-06 22:41:16,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:16,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1094 transitions. [2023-11-06 22:41:16,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:16,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:16,451 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:16,451 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 614 flow. Second operand 4 states and 1094 transitions. [2023-11-06 22:41:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 180 transitions, 1363 flow [2023-11-06 22:41:16,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 180 transitions, 1353 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:41:16,462 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 635 flow [2023-11-06 22:41:16,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=635, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2023-11-06 22:41:16,463 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 23 predicate places. [2023-11-06 22:41:16,463 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 635 flow [2023-11-06 22:41:16,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.5) internal successors, (1018), 4 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:16,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:16,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:16,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-06 22:41:16,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:16,676 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:16,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1013919851, now seen corresponding path program 1 times [2023-11-06 22:41:16,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:16,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407314555] [2023-11-06 22:41:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:16,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:16,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:16,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:41:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:16,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:41:16,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:16,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:41:16,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:16,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407314555] [2023-11-06 22:41:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407314555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:16,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:16,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:41:16,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817657617] [2023-11-06 22:41:16,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:16,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:16,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:16,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 694 [2023-11-06 22:41:16,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 635 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:16,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:16,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 694 [2023-11-06 22:41:16,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:18,365 INFO L124 PetriNetUnfolderBase]: 4352/6158 cut-off events. [2023-11-06 22:41:18,365 INFO L125 PetriNetUnfolderBase]: For 3505/3505 co-relation queries the response was YES. [2023-11-06 22:41:18,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18393 conditions, 6158 events. 4352/6158 cut-off events. For 3505/3505 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 31424 event pairs, 1882 based on Foata normal form. 0/3932 useless extension candidates. Maximal degree in co-relation 18359. Up to 4377 conditions per place. [2023-11-06 22:41:18,396 INFO L140 encePairwiseOnDemand]: 688/694 looper letters, 135 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-11-06 22:41:18,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1068 flow [2023-11-06 22:41:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-11-06 22:41:18,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42122958693563883 [2023-11-06 22:41:18,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-11-06 22:41:18,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-11-06 22:41:18,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:18,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-11-06 22:41:18,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:18,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:18,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 694.0) internal successors, (2776), 4 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:18,404 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 635 flow. Second operand 3 states and 877 transitions. [2023-11-06 22:41:18,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1068 flow [2023-11-06 22:41:18,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 139 transitions, 1062 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:18,414 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 661 flow [2023-11-06 22:41:18,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=661, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2023-11-06 22:41:18,415 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 26 predicate places. [2023-11-06 22:41:18,415 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 661 flow [2023-11-06 22:41:18,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:18,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:18,416 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-11-06 22:41:18,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-06 22:41:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:18,628 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:41:18,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash 561069474, now seen corresponding path program 1 times [2023-11-06 22:41:18,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:41:18,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287289450] [2023-11-06 22:41:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:18,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:41:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:41:18,629 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:41:18,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:41:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:18,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:41:18,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:18,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:41:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:19,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:21,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:41:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287289450] [2023-11-06 22:41:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287289450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:21,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:41:21,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-06 22:41:21,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568447507] [2023-11-06 22:41:21,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:41:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:41:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:41:21,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:41:38,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 694 [2023-11-06 22:41:38,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 661 flow. Second operand has 20 states, 20 states have (on average 240.05) internal successors, (4801), 20 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:38,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:38,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 694 [2023-11-06 22:41:38,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:45,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:47,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:49,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:51,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:53,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:55,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:57,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:41:59,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:06,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:08,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:10,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:12,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:14,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:16,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:18,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:20,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:42:24,604 INFO L124 PetriNetUnfolderBase]: 4375/6200 cut-off events. [2023-11-06 22:42:24,604 INFO L125 PetriNetUnfolderBase]: For 4889/4889 co-relation queries the response was YES. [2023-11-06 22:42:24,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20016 conditions, 6200 events. 4375/6200 cut-off events. For 4889/4889 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 31527 event pairs, 3290 based on Foata normal form. 27/4303 useless extension candidates. Maximal degree in co-relation 19979. Up to 6086 conditions per place. [2023-11-06 22:42:24,650 INFO L140 encePairwiseOnDemand]: 684/694 looper letters, 52 selfloop transitions, 81 changer transitions 0/133 dead transitions. [2023-11-06 22:42:24,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1071 flow [2023-11-06 22:42:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:42:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:42:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4918 transitions. [2023-11-06 22:42:24,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543227665706052 [2023-11-06 22:42:24,662 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4918 transitions. [2023-11-06 22:42:24,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4918 transitions. [2023-11-06 22:42:24,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:24,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4918 transitions. [2023-11-06 22:42:24,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 245.9) internal successors, (4918), 20 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:24,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 694.0) internal successors, (14574), 21 states have internal predecessors, (14574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:24,683 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 694.0) internal successors, (14574), 21 states have internal predecessors, (14574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:24,683 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 661 flow. Second operand 20 states and 4918 transitions. [2023-11-06 22:42:24,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1071 flow [2023-11-06 22:42:24,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 133 transitions, 1051 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:24,694 INFO L231 Difference]: Finished difference. Result has 118 places, 133 transitions, 1040 flow [2023-11-06 22:42:24,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1040, PETRI_PLACES=118, PETRI_TRANSITIONS=133} [2023-11-06 22:42:24,694 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 54 predicate places. [2023-11-06 22:42:24,694 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 133 transitions, 1040 flow [2023-11-06 22:42:24,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 240.05) internal successors, (4801), 20 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:24,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:24,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:24,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:24,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:42:24,896 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:42:24,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1597390104, now seen corresponding path program 1 times [2023-11-06 22:42:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:42:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656636007] [2023-11-06 22:42:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:42:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:42:24,898 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:42:24,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:42:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:25,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:42:25,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:25,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:42:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:42:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:42:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:42:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:42:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:42:25,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:42:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:42:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:42:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:42:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:42:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,268 INFO L351 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 [2023-11-06 22:42:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:42:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:42:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:25,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:42:25,352 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:42:25,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:42:25,377 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:42:25,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:42:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:25,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:25,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:42:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656636007] [2023-11-06 22:42:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656636007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:25,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122186796] [2023-11-06 22:42:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:42:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:25,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 694 [2023-11-06 22:42:25,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 133 transitions, 1040 flow. Second operand has 4 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:25,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:25,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 694 [2023-11-06 22:42:25,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:27,238 INFO L124 PetriNetUnfolderBase]: 3135/4474 cut-off events. [2023-11-06 22:42:27,239 INFO L125 PetriNetUnfolderBase]: For 3318/3318 co-relation queries the response was YES. [2023-11-06 22:42:27,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13855 conditions, 4474 events. 3135/4474 cut-off events. For 3318/3318 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 21340 event pairs, 2256 based on Foata normal form. 0/3386 useless extension candidates. Maximal degree in co-relation 13807. Up to 4344 conditions per place. [2023-11-06 22:42:27,276 INFO L140 encePairwiseOnDemand]: 687/694 looper letters, 102 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2023-11-06 22:42:27,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 127 transitions, 1252 flow [2023-11-06 22:42:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:42:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1304 transitions. [2023-11-06 22:42:27,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37579250720461094 [2023-11-06 22:42:27,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1304 transitions. [2023-11-06 22:42:27,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1304 transitions. [2023-11-06 22:42:27,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:27,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1304 transitions. [2023-11-06 22:42:27,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 260.8) internal successors, (1304), 5 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 694.0) internal successors, (4164), 6 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,286 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 1040 flow. Second operand 5 states and 1304 transitions. [2023-11-06 22:42:27,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 127 transitions, 1252 flow [2023-11-06 22:42:27,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 127 transitions, 1111 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-11-06 22:42:27,298 INFO L231 Difference]: Finished difference. Result has 112 places, 127 transitions, 907 flow [2023-11-06 22:42:27,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=907, PETRI_PLACES=112, PETRI_TRANSITIONS=127} [2023-11-06 22:42:27,299 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 48 predicate places. [2023-11-06 22:42:27,300 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 127 transitions, 907 flow [2023-11-06 22:42:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:27,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:27,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-06 22:42:27,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:42:27,502 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:42:27,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1366746822, now seen corresponding path program 1 times [2023-11-06 22:42:27,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:42:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106568470] [2023-11-06 22:42:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:27,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:42:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:42:27,504 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:42:27,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 22:42:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:27,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:42:27,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:27,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:27,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:42:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106568470] [2023-11-06 22:42:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106568470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:27,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:27,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:27,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937311720] [2023-11-06 22:42:27,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:27,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:27,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:42:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:27,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 694 [2023-11-06 22:42:27,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 127 transitions, 907 flow. Second operand has 4 states, 4 states have (on average 252.75) internal successors, (1011), 4 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:27,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:27,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 694 [2023-11-06 22:42:27,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:29,090 INFO L124 PetriNetUnfolderBase]: 2081/3006 cut-off events. [2023-11-06 22:42:29,090 INFO L125 PetriNetUnfolderBase]: For 2678/2678 co-relation queries the response was YES. [2023-11-06 22:42:29,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9500 conditions, 3006 events. 2081/3006 cut-off events. For 2678/2678 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 13647 event pairs, 1520 based on Foata normal form. 14/2342 useless extension candidates. Maximal degree in co-relation 9451. Up to 2862 conditions per place. [2023-11-06 22:42:29,112 INFO L140 encePairwiseOnDemand]: 690/694 looper letters, 203 selfloop transitions, 3 changer transitions 0/206 dead transitions. [2023-11-06 22:42:29,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 206 transitions, 1855 flow [2023-11-06 22:42:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1064 transitions. [2023-11-06 22:42:29,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38328530259365995 [2023-11-06 22:42:29,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1064 transitions. [2023-11-06 22:42:29,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1064 transitions. [2023-11-06 22:42:29,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:29,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1064 transitions. [2023-11-06 22:42:29,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:29,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:29,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 694.0) internal successors, (3470), 5 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:29,122 INFO L175 Difference]: Start difference. First operand has 112 places, 127 transitions, 907 flow. Second operand 4 states and 1064 transitions. [2023-11-06 22:42:29,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 206 transitions, 1855 flow [2023-11-06 22:42:29,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 206 transitions, 1805 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:29,134 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 878 flow [2023-11-06 22:42:29,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=694, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=878, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2023-11-06 22:42:29,134 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 49 predicate places. [2023-11-06 22:42:29,134 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 878 flow [2023-11-06 22:42:29,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 252.75) internal successors, (1011), 4 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:29,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:29,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:29,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:42:29,335 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-11-06 22:42:29,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1597390105, now seen corresponding path program 1 times [2023-11-06 22:42:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:42:29,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90223616] [2023-11-06 22:42:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:29,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:42:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:42:29,337 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:42:29,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09141b0-6be8-4384-b011-c36c22170e55/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 22:42:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:29,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:42:29,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:29,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:42:29,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:42:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:42:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:42:29,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,663 INFO L351 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 [2023-11-06 22:42:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:42:29,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:42:29,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:42:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:42:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:42:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:29,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,857 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:42:29,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:42:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:42:29,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:29,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:42:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:42:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:29,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:42:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:30,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:42:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:30,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:42:30,168 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:42:30,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:42:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:30,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:42:30,244 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:42:30,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:42:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:30,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:31,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:42:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90223616] [2023-11-06 22:42:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90223616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:31,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:31,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:42:31,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521768146] [2023-11-06 22:42:31,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:31,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:42:31,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:42:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:42:31,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:42:34,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:38,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:47,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:51,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:53,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:57,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:59,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]