./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:00:40,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:00:40,345 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:00:40,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:00:40,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:00:40,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:00:40,400 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:00:40,401 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:00:40,402 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:00:40,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:00:40,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:00:40,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:00:40,413 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:00:40,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:00:40,416 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:00:40,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:00:40,417 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:00:40,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:00:40,418 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:00:40,419 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:00:40,419 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:00:40,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:00:40,421 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:00:40,421 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:00:40,422 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:00:40,422 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:00:40,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:00:40,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:00:40,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:00:40,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:40,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:00:40,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:00:40,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:00:40,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:00:40,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:00:40,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:00:40,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:00:40,429 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:00:40,429 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_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2023-11-06 23:00:40,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:00:40,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:00:40,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:00:40,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:00:40,815 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:00:40,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-06 23:00:44,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:00:44,422 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:00:44,423 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-06 23:00:44,432 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data/1847ca36e/204e1c42c3cb4e42b594189cccd33b66/FLAGe298396a0 [2023-11-06 23:00:44,447 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data/1847ca36e/204e1c42c3cb4e42b594189cccd33b66 [2023-11-06 23:00:44,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:00:44,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:00:44,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:44,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:00:44,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:00:44,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:44" (1/1) ... [2023-11-06 23:00:44,473 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7817826f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:44, skipping insertion in model container [2023-11-06 23:00:44,473 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:44" (1/1) ... [2023-11-06 23:00:44,520 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:00:44,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:44,793 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-06 23:00:44,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34ee58c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:44, skipping insertion in model container [2023-11-06 23:00:44,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:44,794 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 23:00:44,796 INFO L158 Benchmark]: Toolchain (without parser) took 343.62ms. Allocated memory is still 151.0MB. Free memory was 115.4MB in the beginning and 104.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:00:44,797 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 50.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:00:44,797 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.79ms. Allocated memory is still 151.0MB. Free memory was 115.4MB in the beginning and 105.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 23:00:44,799 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 50.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.79ms. Allocated memory is still 151.0MB. Free memory was 115.4MB in the beginning and 105.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:00:47,413 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:00:47,503 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 23:00:47,511 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:00:47,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:00:47,543 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:00:47,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:00:47,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:00:47,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:00:47,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:00:47,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:00:47,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:00:47,557 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:00:47,559 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:00:47,559 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:00:47,560 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:00:47,560 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:00:47,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:00:47,561 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:00:47,562 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:00:47,563 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:00:47,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:00:47,564 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:00:47,564 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 23:00:47,565 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 23:00:47,565 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:00:47,566 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:00:47,566 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:00:47,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:00:47,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:00:47,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:00:47,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:47,570 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:00:47,570 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:00:47,570 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 23:00:47,571 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 23:00:47,571 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:00:47,571 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:00:47,572 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:00:47,573 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 23:00:47,573 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:00:47,574 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_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2023-11-06 23:00:48,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:00:48,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:00:48,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:00:48,056 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:00:48,057 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:00:48,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-06 23:00:51,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:00:51,561 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:00:51,562 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-06 23:00:51,570 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data/dcf65f727/f5f7fd455cf844aaaccfacbbb3034851/FLAG6ddcbc933 [2023-11-06 23:00:51,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/data/dcf65f727/f5f7fd455cf844aaaccfacbbb3034851 [2023-11-06 23:00:51,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:00:51,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:00:51,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:51,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:00:51,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:00:51,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:51" (1/1) ... [2023-11-06 23:00:51,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3508e05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:51, skipping insertion in model container [2023-11-06 23:00:51,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:51" (1/1) ... [2023-11-06 23:00:51,627 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:00:51,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:51,935 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 23:00:51,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:00:51,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:51,992 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:00:52,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:00:52,067 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:00:52,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52 WrapperNode [2023-11-06 23:00:52,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:00:52,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:00:52,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:00:52,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:00:52,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,172 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 180 [2023-11-06 23:00:52,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:00:52,175 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:00:52,175 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:00:52,175 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:00:52,186 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,245 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,247 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:00:52,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:00:52,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:00:52,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:00:52,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (1/1) ... [2023-11-06 23:00:52,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:00:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:52,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:00:52,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:00:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:00:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 23:00:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:00:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 23:00:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:00:52,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:00:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:00:52,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:00:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:00:52,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:00:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:00:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:00:52,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:00:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:00:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 23:00:52,369 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:00:52,554 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:00:52,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:00:53,511 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:00:53,525 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:00:53,540 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 23:00:53,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:53 BoogieIcfgContainer [2023-11-06 23:00:53,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:00:53,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:00:53,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:00:53,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:00:53,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:00:51" (1/3) ... [2023-11-06 23:00:53,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608499bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:53, skipping insertion in model container [2023-11-06 23:00:53,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:52" (2/3) ... [2023-11-06 23:00:53,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608499bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:53, skipping insertion in model container [2023-11-06 23:00:53,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:53" (3/3) ... [2023-11-06 23:00:53,554 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-11-06 23:00:53,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:00:53,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-06 23:00:53,579 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:00:53,805 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:00:53,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 361 transitions, 743 flow [2023-11-06 23:00:54,056 INFO L124 PetriNetUnfolderBase]: 29/358 cut-off events. [2023-11-06 23:00:54,056 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:54,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 358 events. 29/358 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 647 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 271. Up to 3 conditions per place. [2023-11-06 23:00:54,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 361 transitions, 743 flow [2023-11-06 23:00:54,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 353 transitions, 724 flow [2023-11-06 23:00:54,080 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:00:54,091 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 353 transitions, 724 flow [2023-11-06 23:00:54,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 353 transitions, 724 flow [2023-11-06 23:00:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 353 transitions, 724 flow [2023-11-06 23:00:54,188 INFO L124 PetriNetUnfolderBase]: 29/353 cut-off events. [2023-11-06 23:00:54,189 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:00:54,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 353 events. 29/353 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 646 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 271. Up to 3 conditions per place. [2023-11-06 23:00:54,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 13338 [2023-11-06 23:01:46,628 INFO L134 LiptonReduction]: Checked pairs total: 26414 [2023-11-06 23:01:46,629 INFO L136 LiptonReduction]: Total number of compositions: 404 [2023-11-06 23:01:46,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:01:46,652 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;@398deff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:01:46,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-06 23:01:46,656 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:01:46,656 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:01:46,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:01:46,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:46,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:01:46,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:46,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash 44580, now seen corresponding path program 1 times [2023-11-06 23:01:46,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:46,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323344376] [2023-11-06 23:01:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:46,677 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 23:01:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:46,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:01:46,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 23:01:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:46,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:01:46,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:46,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:01:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,941 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:46,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:47,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,119 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 23:01:47,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:47,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:47,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:47,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:47,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:47,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:47,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:47,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:47,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323344376] [2023-11-06 23:01:47,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323344376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:47,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:01:47,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209723812] [2023-11-06 23:01:47,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:47,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:47,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:48,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 765 [2023-11-06 23:01:48,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:48,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:48,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 765 [2023-11-06 23:01:48,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:53,391 INFO L124 PetriNetUnfolderBase]: 18867/25229 cut-off events. [2023-11-06 23:01:53,392 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-11-06 23:01:53,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50886 conditions, 25229 events. 18867/25229 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 132971 event pairs, 14603 based on Foata normal form. 0/7920 useless extension candidates. Maximal degree in co-relation 48202. Up to 25152 conditions per place. [2023-11-06 23:01:53,617 INFO L140 encePairwiseOnDemand]: 748/765 looper letters, 78 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2023-11-06 23:01:53,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 88 transitions, 368 flow [2023-11-06 23:01:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-11-06 23:01:53,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45838779956427017 [2023-11-06 23:01:53,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-11-06 23:01:53,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-11-06 23:01:53,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:53,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-11-06 23:01:53,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,669 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 1052 transitions. [2023-11-06 23:01:53,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 88 transitions, 368 flow [2023-11-06 23:01:53,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 356 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 23:01:53,690 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 234 flow [2023-11-06 23:01:53,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2023-11-06 23:01:53,702 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2023-11-06 23:01:53,703 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 234 flow [2023-11-06 23:01:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:53,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:01:53,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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 23:01:53,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:53,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:53,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:53,919 INFO L85 PathProgramCache]: Analyzing trace with hash 44581, now seen corresponding path program 1 times [2023-11-06 23:01:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:53,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106255783] [2023-11-06 23:01:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:53,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:53,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:01:53,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 23:01:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:54,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:01:54,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:54,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-06 23:01:54,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,071 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 23:01:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:01:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:01:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,115 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 23:01:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:01:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:01:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:54,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:01:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:01:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:54,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:01:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:54,292 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:54,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106255783] [2023-11-06 23:01:54,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106255783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:54,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:01:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174582919] [2023-11-06 23:01:54,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:54,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:54,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 765 [2023-11-06 23:01:54,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:54,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 765 [2023-11-06 23:01:54,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:58,689 INFO L124 PetriNetUnfolderBase]: 18867/25223 cut-off events. [2023-11-06 23:01:58,689 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-06 23:01:58,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50606 conditions, 25223 events. 18867/25223 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 132010 event pairs, 14603 based on Foata normal form. 6/7930 useless extension candidates. Maximal degree in co-relation 50533. Up to 25140 conditions per place. [2023-11-06 23:01:58,863 INFO L140 encePairwiseOnDemand]: 758/765 looper letters, 74 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2023-11-06 23:01:58,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 390 flow [2023-11-06 23:01:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1042 transitions. [2023-11-06 23:01:58,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45403050108932463 [2023-11-06 23:01:58,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1042 transitions. [2023-11-06 23:01:58,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1042 transitions. [2023-11-06 23:01:58,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:58,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1042 transitions. [2023-11-06 23:01:58,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,886 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 234 flow. Second operand 3 states and 1042 transitions. [2023-11-06 23:01:58,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 390 flow [2023-11-06 23:01:58,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:58,893 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 224 flow [2023-11-06 23:01:58,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2023-11-06 23:01:58,896 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -10 predicate places. [2023-11-06 23:01:58,896 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 224 flow [2023-11-06 23:01:58,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:58,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:58,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:01:58,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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 23:01:59,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:59,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:01:59,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:59,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1387748, now seen corresponding path program 1 times [2023-11-06 23:01:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028749369] [2023-11-06 23:01:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:59,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:59,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:01:59,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 23:01:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:59,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:01:59,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:59,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:01:59,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:59,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:59,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,467 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 23:01:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,517 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 23:01:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,606 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:01:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,640 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 23:01:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:01:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:01:59,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:01:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:59,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:59,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:59,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028749369] [2023-11-06 23:01:59,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028749369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:59,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:01:59,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:01:59,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181812983] [2023-11-06 23:01:59,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:59,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:01:59,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:01:59,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:01:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:02:02,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 765 [2023-11-06 23:02:02,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:02,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 765 [2023-11-06 23:02:02,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:04,911 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 23:02:06,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:10,445 INFO L124 PetriNetUnfolderBase]: 18882/25247 cut-off events. [2023-11-06 23:02:10,445 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-06 23:02:10,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50685 conditions, 25247 events. 18882/25247 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 1338. Compared 131994 event pairs, 14603 based on Foata normal form. 0/7934 useless extension candidates. Maximal degree in co-relation 50533. Up to 25158 conditions per place. [2023-11-06 23:02:10,575 INFO L140 encePairwiseOnDemand]: 753/765 looper letters, 72 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2023-11-06 23:02:10,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 548 flow [2023-11-06 23:02:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1938 transitions. [2023-11-06 23:02:10,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-11-06 23:02:10,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1938 transitions. [2023-11-06 23:02:10,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1938 transitions. [2023-11-06 23:02:10,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:10,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1938 transitions. [2023-11-06 23:02:10,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:10,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 765.0) internal successors, (5355), 7 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:10,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 765.0) internal successors, (5355), 7 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:10,606 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 224 flow. Second operand 6 states and 1938 transitions. [2023-11-06 23:02:10,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 548 flow [2023-11-06 23:02:10,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 516 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:10,612 INFO L231 Difference]: Finished difference. Result has 77 places, 106 transitions, 435 flow [2023-11-06 23:02:10,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=77, PETRI_TRANSITIONS=106} [2023-11-06 23:02:10,614 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2023-11-06 23:02:10,615 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 106 transitions, 435 flow [2023-11-06 23:02:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:10,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:10,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:02:10,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:10,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:10,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash 43096263, now seen corresponding path program 1 times [2023-11-06 23:02:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:10,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645057980] [2023-11-06 23:02:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:10,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:10,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:10,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 23:02:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:10,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:02:10,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:10,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,040 INFO L322 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2023-11-06 23:02:11,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2023-11-06 23:02:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,106 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:11,107 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 23:02:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,136 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 23:02:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,183 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:11,183 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 23:02:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,212 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 23:02:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,250 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:11,251 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 23:02:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:11,286 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 23:02:11,359 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:02:11,359 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 23:02:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:11,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:11,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:11,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645057980] [2023-11-06 23:02:11,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645057980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:11,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:11,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463273159] [2023-11-06 23:02:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:11,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:11,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:12,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 765 [2023-11-06 23:02:12,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 106 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:12,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:12,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 765 [2023-11-06 23:02:12,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:15,083 INFO L124 PetriNetUnfolderBase]: 14496/19586 cut-off events. [2023-11-06 23:02:15,083 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-06 23:02:15,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39409 conditions, 19586 events. 14496/19586 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 101561 event pairs, 11152 based on Foata normal form. 0/6646 useless extension candidates. Maximal degree in co-relation 39306. Up to 19516 conditions per place. [2023-11-06 23:02:15,195 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 98 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-11-06 23:02:15,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 100 transitions, 598 flow [2023-11-06 23:02:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-11-06 23:02:15,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644880174291939 [2023-11-06 23:02:15,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-11-06 23:02:15,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-11-06 23:02:15,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:15,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-11-06 23:02:15,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:15,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:15,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:15,214 INFO L175 Difference]: Start difference. First operand has 77 places, 106 transitions, 435 flow. Second operand 3 states and 1066 transitions. [2023-11-06 23:02:15,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 100 transitions, 598 flow [2023-11-06 23:02:15,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 554 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:15,220 INFO L231 Difference]: Finished difference. Result has 76 places, 100 transitions, 358 flow [2023-11-06 23:02:15,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=76, PETRI_TRANSITIONS=100} [2023-11-06 23:02:15,221 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2023-11-06 23:02:15,222 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 100 transitions, 358 flow [2023-11-06 23:02:15,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:15,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:15,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:02:15,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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 23:02:15,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:15,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:15,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash 43096264, now seen corresponding path program 1 times [2023-11-06 23:02:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992220368] [2023-11-06 23:02:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:15,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:15,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:15,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 23:02:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:15,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:02:15,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,599 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 5 [2023-11-06 23:02:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 23:02:15,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,693 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 23:02:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:02:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,764 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 23:02:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:15,791 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 23:02:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:15,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992220368] [2023-11-06 23:02:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992220368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:15,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:15,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:15,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64164443] [2023-11-06 23:02:15,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:16,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 765 [2023-11-06 23:02:16,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 100 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:16,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:16,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 765 [2023-11-06 23:02:16,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:18,330 INFO L124 PetriNetUnfolderBase]: 10110/13925 cut-off events. [2023-11-06 23:02:18,330 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-06 23:02:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28055 conditions, 13925 events. 10110/13925 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 71945 event pairs, 7701 based on Foata normal form. 0/5353 useless extension candidates. Maximal degree in co-relation 28043. Up to 13855 conditions per place. [2023-11-06 23:02:18,399 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 92 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-11-06 23:02:18,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 516 flow [2023-11-06 23:02:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2023-11-06 23:02:18,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636165577342048 [2023-11-06 23:02:18,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2023-11-06 23:02:18,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2023-11-06 23:02:18,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:18,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2023-11-06 23:02:18,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 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 23:02:18,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:18,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:18,419 INFO L175 Difference]: Start difference. First operand has 76 places, 100 transitions, 358 flow. Second operand 3 states and 1064 transitions. [2023-11-06 23:02:18,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 516 flow [2023-11-06 23:02:18,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 94 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:18,423 INFO L231 Difference]: Finished difference. Result has 75 places, 94 transitions, 331 flow [2023-11-06 23:02:18,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=75, PETRI_TRANSITIONS=94} [2023-11-06 23:02:18,424 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2023-11-06 23:02:18,424 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 94 transitions, 331 flow [2023-11-06 23:02:18,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:18,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:18,425 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:02:18,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:18,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:18,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:18,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1601544668, now seen corresponding path program 2 times [2023-11-06 23:02:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:18,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897311418] [2023-11-06 23:02:18,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:02:18,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:18,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:18,653 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:18,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 23:02:18,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:02:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:18,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:02:18,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:18,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:02:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,814 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 18 treesize of output 1 [2023-11-06 23:02:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:02:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:02:18,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:18,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:02:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:18,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:02:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,022 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 23:02:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:02:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:02:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:02:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:19,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:20,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897311418] [2023-11-06 23:02:20,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897311418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:20,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:02:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356483976] [2023-11-06 23:02:20,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:02:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:02:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:02:29,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 765 [2023-11-06 23:02:29,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 94 transitions, 331 flow. Second operand has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:29,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:29,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 765 [2023-11-06 23:02:29,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:34,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:36,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:38,434 WARN L539 Checker$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 23:02:40,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:42,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:44,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:02:46,671 WARN L539 Checker$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 23:02:48,719 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 23:02:51,985 INFO L124 PetriNetUnfolderBase]: 10120/13945 cut-off events. [2023-11-06 23:02:51,986 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-11-06 23:02:52,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28128 conditions, 13945 events. 10120/13945 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 71957 event pairs, 7701 based on Foata normal form. 10/5373 useless extension candidates. Maximal degree in co-relation 28115. Up to 13838 conditions per place. [2023-11-06 23:02:52,061 INFO L140 encePairwiseOnDemand]: 755/765 looper letters, 68 selfloop transitions, 45 changer transitions 0/114 dead transitions. [2023-11-06 23:02:52,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 669 flow [2023-11-06 23:02:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:02:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:02:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3807 transitions. [2023-11-06 23:02:52,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147058823529412 [2023-11-06 23:02:52,078 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3807 transitions. [2023-11-06 23:02:52,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3807 transitions. [2023-11-06 23:02:52,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:52,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3807 transitions. [2023-11-06 23:02:52,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 317.25) internal successors, (3807), 12 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:52,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 765.0) internal successors, (9945), 13 states have internal predecessors, (9945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:52,114 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 765.0) internal successors, (9945), 13 states have internal predecessors, (9945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:52,114 INFO L175 Difference]: Start difference. First operand has 75 places, 94 transitions, 331 flow. Second operand 12 states and 3807 transitions. [2023-11-06 23:02:52,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 669 flow [2023-11-06 23:02:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 114 transitions, 668 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:52,120 INFO L231 Difference]: Finished difference. Result has 91 places, 114 transitions, 590 flow [2023-11-06 23:02:52,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=590, PETRI_PLACES=91, PETRI_TRANSITIONS=114} [2023-11-06 23:02:52,121 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 10 predicate places. [2023-11-06 23:02:52,121 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 114 transitions, 590 flow [2023-11-06 23:02:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:52,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:52,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:52,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:52,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:52,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1534131294, now seen corresponding path program 1 times [2023-11-06 23:02:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:52,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981651800] [2023-11-06 23:02:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:52,336 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 23:02:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:52,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:52,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 23:02:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:52,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:02:52,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:52,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,521 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 5 [2023-11-06 23:02:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 23:02:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:02:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:02:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,612 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 16 treesize of output 1 [2023-11-06 23:02:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,641 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:02:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,685 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 23:02:52,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:02:52,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:02:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,772 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 23:02:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:52,803 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 23:02:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:52,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:52,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:52,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981651800] [2023-11-06 23:02:52,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981651800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:52,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:52,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796924233] [2023-11-06 23:02:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:52,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:53,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 765 [2023-11-06 23:02:53,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 114 transitions, 590 flow. Second operand has 4 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:53,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:53,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 765 [2023-11-06 23:02:53,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:56,093 INFO L124 PetriNetUnfolderBase]: 9895/13615 cut-off events. [2023-11-06 23:02:56,094 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-06 23:02:56,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27553 conditions, 13615 events. 9895/13615 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 69948 event pairs, 7526 based on Foata normal form. 0/5305 useless extension candidates. Maximal degree in co-relation 27533. Up to 13545 conditions per place. [2023-11-06 23:02:56,205 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 110 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-06 23:02:56,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 808 flow [2023-11-06 23:02:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2023-11-06 23:02:56,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627450980392157 [2023-11-06 23:02:56,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2023-11-06 23:02:56,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2023-11-06 23:02:56,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:56,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2023-11-06 23:02:56,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:56,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:56,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:56,225 INFO L175 Difference]: Start difference. First operand has 91 places, 114 transitions, 590 flow. Second operand 3 states and 1062 transitions. [2023-11-06 23:02:56,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 808 flow [2023-11-06 23:02:56,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 678 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-06 23:02:56,233 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 458 flow [2023-11-06 23:02:56,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=458, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2023-11-06 23:02:56,234 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2023-11-06 23:02:56,234 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 458 flow [2023-11-06 23:02:56,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:56,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:56,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:56,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:56,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:02:56,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1534131292, now seen corresponding path program 1 times [2023-11-06 23:02:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:56,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209929516] [2023-11-06 23:02:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:56,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:56,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:56,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 23:02:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:56,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:02:56,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,593 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 15 treesize of output 11 [2023-11-06 23:02:56,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,642 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:56,643 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 23:02:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,687 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:56,687 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 23:02:56,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,711 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 23:02:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-06 23:02:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,813 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:56,814 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 23:02:56,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,852 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:02:56,853 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 23:02:56,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,880 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 23:02:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:56,915 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 23:02:56,961 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:02:56,961 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 23:02:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:57,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:57,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209929516] [2023-11-06 23:02:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209929516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:57,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75484853] [2023-11-06 23:02:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:57,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 765 [2023-11-06 23:02:57,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 458 flow. Second operand has 4 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:57,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:57,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 765 [2023-11-06 23:02:57,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:59,786 INFO L124 PetriNetUnfolderBase]: 9670/13285 cut-off events. [2023-11-06 23:02:59,786 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-11-06 23:02:59,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26829 conditions, 13285 events. 9670/13285 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 67887 event pairs, 7351 based on Foata normal form. 0/5241 useless extension candidates. Maximal degree in co-relation 26809. Up to 13215 conditions per place. [2023-11-06 23:02:59,877 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 108 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2023-11-06 23:02:59,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 672 flow [2023-11-06 23:02:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1060 transitions. [2023-11-06 23:02:59,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46187363834422657 [2023-11-06 23:02:59,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1060 transitions. [2023-11-06 23:02:59,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1060 transitions. [2023-11-06 23:02:59,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:59,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1060 transitions. [2023-11-06 23:02:59,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.3333333333333) internal successors, (1060), 3 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,891 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 458 flow. Second operand 3 states and 1060 transitions. [2023-11-06 23:02:59,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 672 flow [2023-11-06 23:02:59,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 671 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:59,897 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 455 flow [2023-11-06 23:02:59,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2023-11-06 23:02:59,898 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 4 predicate places. [2023-11-06 23:02:59,898 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 455 flow [2023-11-06 23:02:59,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 332.5) internal successors, (1330), 4 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:59,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:59,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:00,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:00,113 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:00,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash -313429783, now seen corresponding path program 1 times [2023-11-06 23:03:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:00,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758442614] [2023-11-06 23:03:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:00,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:00,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:00,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:00,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 23:03:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:00,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:03:00,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:00,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:00,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758442614] [2023-11-06 23:03:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758442614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:00,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225825928] [2023-11-06 23:03:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:00,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 765 [2023-11-06 23:03:00,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 317.4) internal successors, (1587), 5 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:00,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:00,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 765 [2023-11-06 23:03:00,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:03,505 INFO L124 PetriNetUnfolderBase]: 12003/16565 cut-off events. [2023-11-06 23:03:03,505 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-11-06 23:03:03,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33489 conditions, 16565 events. 12003/16565 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 88583 event pairs, 8498 based on Foata normal form. 0/6856 useless extension candidates. Maximal degree in co-relation 33468. Up to 13214 conditions per place. [2023-11-06 23:03:03,625 INFO L140 encePairwiseOnDemand]: 755/765 looper letters, 206 selfloop transitions, 5 changer transitions 0/212 dead transitions. [2023-11-06 23:03:03,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 212 transitions, 1214 flow [2023-11-06 23:03:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1730 transitions. [2023-11-06 23:03:03,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4522875816993464 [2023-11-06 23:03:03,633 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1730 transitions. [2023-11-06 23:03:03,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1730 transitions. [2023-11-06 23:03:03,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:03,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1730 transitions. [2023-11-06 23:03:03,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 346.0) internal successors, (1730), 5 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,647 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,647 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 455 flow. Second operand 5 states and 1730 transitions. [2023-11-06 23:03:03,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 212 transitions, 1214 flow [2023-11-06 23:03:03,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 212 transitions, 1213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:03,656 INFO L231 Difference]: Finished difference. Result has 90 places, 112 transitions, 487 flow [2023-11-06 23:03:03,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=487, PETRI_PLACES=90, PETRI_TRANSITIONS=112} [2023-11-06 23:03:03,657 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2023-11-06 23:03:03,658 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 112 transitions, 487 flow [2023-11-06 23:03:03,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.4) internal successors, (1587), 5 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:03,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:03,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:03,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:03,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:03,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:03,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash 603859497, now seen corresponding path program 1 times [2023-11-06 23:03:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:03,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106703238] [2023-11-06 23:03:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:03,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:03,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:03,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:03,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 23:03:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:03:04,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:04,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:04,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106703238] [2023-11-06 23:03:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106703238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:04,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:04,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877973075] [2023-11-06 23:03:04,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:04,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 765 [2023-11-06 23:03:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 112 transitions, 487 flow. Second operand has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:04,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:04,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 765 [2023-11-06 23:03:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:08,276 INFO L124 PetriNetUnfolderBase]: 16655/23100 cut-off events. [2023-11-06 23:03:08,276 INFO L125 PetriNetUnfolderBase]: For 3247/3247 co-relation queries the response was YES. [2023-11-06 23:03:08,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50705 conditions, 23100 events. 16655/23100 cut-off events. For 3247/3247 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 129784 event pairs, 11309 based on Foata normal form. 0/11055 useless extension candidates. Maximal degree in co-relation 50681. Up to 16473 conditions per place. [2023-11-06 23:03:08,464 INFO L140 encePairwiseOnDemand]: 755/765 looper letters, 183 selfloop transitions, 17 changer transitions 0/201 dead transitions. [2023-11-06 23:03:08,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 201 transitions, 1146 flow [2023-11-06 23:03:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1727 transitions. [2023-11-06 23:03:08,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4515032679738562 [2023-11-06 23:03:08,471 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1727 transitions. [2023-11-06 23:03:08,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1727 transitions. [2023-11-06 23:03:08,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:08,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1727 transitions. [2023-11-06 23:03:08,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 345.4) internal successors, (1727), 5 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:08,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:08,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:08,486 INFO L175 Difference]: Start difference. First operand has 90 places, 112 transitions, 487 flow. Second operand 5 states and 1727 transitions. [2023-11-06 23:03:08,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 201 transitions, 1146 flow [2023-11-06 23:03:08,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 201 transitions, 1140 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:08,500 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 562 flow [2023-11-06 23:03:08,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=562, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2023-11-06 23:03:08,501 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2023-11-06 23:03:08,501 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 562 flow [2023-11-06 23:03:08,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:08,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:08,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:08,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:08,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:08,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1126358905, now seen corresponding path program 1 times [2023-11-06 23:03:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:08,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251193179] [2023-11-06 23:03:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:08,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:08,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 23:03:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:08,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:03:08,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:08,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:08,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-06 23:03:08,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-06 23:03:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:08,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:03:08,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:09,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:03:09,146 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:03:09,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,178 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 23:03:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:09,225 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 23:03:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:09,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:09,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:09,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251193179] [2023-11-06 23:03:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251193179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:09,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262376238] [2023-11-06 23:03:09,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:09,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:09,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:09,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 765 [2023-11-06 23:03:10,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 562 flow. Second operand has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:10,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:10,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 765 [2023-11-06 23:03:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:13,184 INFO L124 PetriNetUnfolderBase]: 15953/22046 cut-off events. [2023-11-06 23:03:13,184 INFO L125 PetriNetUnfolderBase]: For 11536/11536 co-relation queries the response was YES. [2023-11-06 23:03:13,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52206 conditions, 22046 events. 15953/22046 cut-off events. For 11536/11536 co-relation queries the response was YES. Maximal size of possible extension queue 1073. Compared 121638 event pairs, 11796 based on Foata normal form. 0/10653 useless extension candidates. Maximal degree in co-relation 52180. Up to 21966 conditions per place. [2023-11-06 23:03:13,344 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 112 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2023-11-06 23:03:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 114 transitions, 784 flow [2023-11-06 23:03:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:03:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-11-06 23:03:13,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45838779956427017 [2023-11-06 23:03:13,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-11-06 23:03:13,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-11-06 23:03:13,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:13,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-11-06 23:03:13,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:13,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:13,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:13,354 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 562 flow. Second operand 3 states and 1052 transitions. [2023-11-06 23:03:13,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 114 transitions, 784 flow [2023-11-06 23:03:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 114 transitions, 768 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:13,367 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 544 flow [2023-11-06 23:03:13,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=544, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-11-06 23:03:13,368 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2023-11-06 23:03:13,368 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 544 flow [2023-11-06 23:03:13,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 330.6) internal successors, (1653), 5 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:13,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:13,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:13,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:13,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:13,586 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:13,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1126358906, now seen corresponding path program 1 times [2023-11-06 23:03:13,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:13,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698142979] [2023-11-06 23:03:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:13,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:13,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:13,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 23:03:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:13,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:03:13,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,777 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:03:13,777 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 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:03:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,792 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,793 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 23:03:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,803 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,803 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 23:03:13,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,815 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,815 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 23:03:13,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,826 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,827 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 23:03:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,855 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,856 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 23:03:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,887 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,887 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 23:03:13,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,918 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,919 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 23:03:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,963 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,963 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 23:03:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:13,997 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:13,997 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 23:03:14,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:14,008 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:14,008 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 23:03:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:14,020 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:03:14,020 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 23:03:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:14,045 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 23:03:14,089 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:03:14,089 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 23:03:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:14,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:14,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698142979] [2023-11-06 23:03:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698142979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:14,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:14,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408134703] [2023-11-06 23:03:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:14,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:14,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 765 [2023-11-06 23:03:14,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 544 flow. Second operand has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:14,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:14,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 765 [2023-11-06 23:03:14,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:17,737 INFO L124 PetriNetUnfolderBase]: 15251/20997 cut-off events. [2023-11-06 23:03:17,737 INFO L125 PetriNetUnfolderBase]: For 10873/10873 co-relation queries the response was YES. [2023-11-06 23:03:17,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49681 conditions, 20997 events. 15251/20997 cut-off events. For 10873/10873 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 114084 event pairs, 11249 based on Foata normal form. 0/10317 useless extension candidates. Maximal degree in co-relation 49654. Up to 20937 conditions per place. [2023-11-06 23:03:17,939 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 110 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-11-06 23:03:17,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 112 transitions, 762 flow [2023-11-06 23:03:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:03:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-11-06 23:03:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549019607843137 [2023-11-06 23:03:17,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-11-06 23:03:17,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-11-06 23:03:17,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:17,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-11-06 23:03:17,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,950 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 544 flow. Second operand 3 states and 1044 transitions. [2023-11-06 23:03:17,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 112 transitions, 762 flow [2023-11-06 23:03:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 112 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:17,968 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 541 flow [2023-11-06 23:03:17,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=541, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2023-11-06 23:03:17,969 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 12 predicate places. [2023-11-06 23:03:17,969 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 541 flow [2023-11-06 23:03:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:17,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:17,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:17,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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)] Ended with exit code 0 [2023-11-06 23:03:18,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:18,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:18,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash 541334366, now seen corresponding path program 1 times [2023-11-06 23:03:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442467504] [2023-11-06 23:03:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:18,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:18,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:18,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 23:03:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:18,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:03:18,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:18,386 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 23:03:18,411 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:03:18,412 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 23:03:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:03:18,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:18,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442467504] [2023-11-06 23:03:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442467504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:18,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:18,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023000483] [2023-11-06 23:03:18,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:18,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:19,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 765 [2023-11-06 23:03:19,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 541 flow. Second operand has 4 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:19,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:19,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 765 [2023-11-06 23:03:19,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:21,592 INFO L124 PetriNetUnfolderBase]: 12384/17049 cut-off events. [2023-11-06 23:03:21,592 INFO L125 PetriNetUnfolderBase]: For 9521/9521 co-relation queries the response was YES. [2023-11-06 23:03:21,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40509 conditions, 17049 events. 12384/17049 cut-off events. For 9521/9521 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 89576 event pairs, 8888 based on Foata normal form. 0/8793 useless extension candidates. Maximal degree in co-relation 40481. Up to 16906 conditions per place. [2023-11-06 23:03:21,742 INFO L140 encePairwiseOnDemand]: 759/765 looper letters, 93 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2023-11-06 23:03:21,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 109 transitions, 747 flow [2023-11-06 23:03:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1621 transitions. [2023-11-06 23:03:21,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42379084967320263 [2023-11-06 23:03:21,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1621 transitions. [2023-11-06 23:03:21,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1621 transitions. [2023-11-06 23:03:21,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:21,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1621 transitions. [2023-11-06 23:03:21,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 324.2) internal successors, (1621), 5 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:21,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:21,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:21,756 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 541 flow. Second operand 5 states and 1621 transitions. [2023-11-06 23:03:21,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 109 transitions, 747 flow [2023-11-06 23:03:21,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 109 transitions, 746 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:03:21,766 INFO L231 Difference]: Finished difference. Result has 93 places, 109 transitions, 560 flow [2023-11-06 23:03:21,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=93, PETRI_TRANSITIONS=109} [2023-11-06 23:03:21,767 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 12 predicate places. [2023-11-06 23:03:21,767 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 109 transitions, 560 flow [2023-11-06 23:03:21,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:21,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:21,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:21,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:21,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:21,969 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:21,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash 541334293, now seen corresponding path program 1 times [2023-11-06 23:03:21,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:21,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239602948] [2023-11-06 23:03:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:21,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:21,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 23:03:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:03:22,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:22,140 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 23:03:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:03:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,192 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,242 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 23:03:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,268 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 23:03:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:22,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:03:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:03:22,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:03:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:03:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:03:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:22,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:03:22,431 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 23:03:22,432 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 23:03:22,458 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:03:22,459 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 23:03:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:03:22,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:22,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:22,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239602948] [2023-11-06 23:03:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239602948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:22,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629756913] [2023-11-06 23:03:22,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:23,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 765 [2023-11-06 23:03:23,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:23,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:23,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 765 [2023-11-06 23:03:23,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:25,231 INFO L124 PetriNetUnfolderBase]: 10572/14498 cut-off events. [2023-11-06 23:03:25,231 INFO L125 PetriNetUnfolderBase]: For 8817/8817 co-relation queries the response was YES. [2023-11-06 23:03:25,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34672 conditions, 14498 events. 10572/14498 cut-off events. For 8817/8817 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 73035 event pairs, 7440 based on Foata normal form. 0/7851 useless extension candidates. Maximal degree in co-relation 34643. Up to 14412 conditions per place. [2023-11-06 23:03:25,346 INFO L140 encePairwiseOnDemand]: 758/765 looper letters, 86 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2023-11-06 23:03:25,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 105 transitions, 758 flow [2023-11-06 23:03:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1619 transitions. [2023-11-06 23:03:25,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232679738562091 [2023-11-06 23:03:25,353 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1619 transitions. [2023-11-06 23:03:25,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1619 transitions. [2023-11-06 23:03:25,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:25,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1619 transitions. [2023-11-06 23:03:25,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 323.8) internal successors, (1619), 5 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:25,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:25,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:25,361 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 560 flow. Second operand 5 states and 1619 transitions. [2023-11-06 23:03:25,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 105 transitions, 758 flow [2023-11-06 23:03:25,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 105 transitions, 735 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:03:25,370 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 563 flow [2023-11-06 23:03:25,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=563, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2023-11-06 23:03:25,370 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 9 predicate places. [2023-11-06 23:03:25,370 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 563 flow [2023-11-06 23:03:25,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:25,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:25,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:25,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:25,571 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:25,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 541334367, now seen corresponding path program 1 times [2023-11-06 23:03:25,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:25,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983572963] [2023-11-06 23:03:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:25,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:25,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:25,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 23:03:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:25,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:03:25,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:25,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:03:25,796 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 23:03:25,884 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:03:25,884 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 23:03:25,894 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 23:03:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:26,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:26,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983572963] [2023-11-06 23:03:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983572963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:26,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2023-11-06 23:03:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069985346] [2023-11-06 23:03:26,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:03:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:03:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:03:41,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 765 [2023-11-06 23:03:41,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 563 flow. Second operand has 11 states, 11 states have (on average 290.45454545454544) internal successors, (3195), 11 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:41,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:41,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 765 [2023-11-06 23:03:41,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:51,940 INFO L124 PetriNetUnfolderBase]: 26116/35403 cut-off events. [2023-11-06 23:03:51,940 INFO L125 PetriNetUnfolderBase]: For 11970/11970 co-relation queries the response was YES. [2023-11-06 23:03:52,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83449 conditions, 35403 events. 26116/35403 cut-off events. For 11970/11970 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 197369 event pairs, 11220 based on Foata normal form. 0/18715 useless extension candidates. Maximal degree in co-relation 83420. Up to 10987 conditions per place. [2023-11-06 23:03:52,281 INFO L140 encePairwiseOnDemand]: 747/765 looper letters, 260 selfloop transitions, 77 changer transitions 0/338 dead transitions. [2023-11-06 23:03:52,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 338 transitions, 1975 flow [2023-11-06 23:03:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:03:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:03:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6374 transitions. [2023-11-06 23:03:52,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967631497043262 [2023-11-06 23:03:52,300 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6374 transitions. [2023-11-06 23:03:52,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6374 transitions. [2023-11-06 23:03:52,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:52,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6374 transitions. [2023-11-06 23:03:52,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 303.5238095238095) internal successors, (6374), 21 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:52,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 765.0) internal successors, (16830), 22 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:52,330 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 765.0) internal successors, (16830), 22 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:52,331 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 563 flow. Second operand 21 states and 6374 transitions. [2023-11-06 23:03:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 338 transitions, 1975 flow [2023-11-06 23:03:52,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 338 transitions, 1930 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:03:52,502 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 971 flow [2023-11-06 23:03:52,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=971, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2023-11-06 23:03:52,503 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 28 predicate places. [2023-11-06 23:03:52,503 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 971 flow [2023-11-06 23:03:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 290.45454545454544) internal successors, (3195), 11 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:52,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:52,504 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2023-11-06 23:03:52,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/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 23:03:52,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:52,704 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-06 23:03:52,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1818038660, now seen corresponding path program 1 times [2023-11-06 23:03:52,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:03:52,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426667345] [2023-11-06 23:03:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:52,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:03:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:03:52,708 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:03:52,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50bfac36-ae58-4c11-8733-edb0c58f6aa4/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 23:03:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:52,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:03:52,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:52,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 23:03:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:53,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:54,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:03:54,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426667345] [2023-11-06 23:03:54,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426667345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:54,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:54,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-06 23:03:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266967841] [2023-11-06 23:03:54,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:03:54,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:03:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:03:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:04:15,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 765 [2023-11-06 23:04:15,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 971 flow. Second operand has 16 states, 16 states have (on average 308.0625) internal successors, (4929), 16 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:15,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:15,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 765 [2023-11-06 23:04:15,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:20,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:22,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:24,657 WARN L539 Checker$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 23:04:26,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:28,684 WARN L539 Checker$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 23:04:30,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:34,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:36,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:38,570 WARN L539 Checker$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 23:04:40,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:04:42,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []