./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:32:01,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:32:01,760 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2023-11-06 22:32:01,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:32:01,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:32:01,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:32:01,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:32:01,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:32:01,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:32:01,829 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:32:01,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:32:01,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:32:01,832 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:32:01,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:32:01,834 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:32:01,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:32:01,835 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:32:01,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:32:01,836 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:32:01,836 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:32:01,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:32:01,837 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:32:01,838 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:32:01,839 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:32:01,840 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:32:01,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:32:01,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:32:01,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:32:01,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:01,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:32:01,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:32:01,844 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:32:01,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:32:01,845 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:32:01,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:32:01,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:32:01,845 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:32:01,846 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_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2023-11-06 22:32:02,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:32:02,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:32:02,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:32:02,148 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:32:02,149 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:32:02,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/verifythis/tree_max.c [2023-11-06 22:32:05,229 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:32:05,477 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:32:05,477 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/sv-benchmarks/c/verifythis/tree_max.c [2023-11-06 22:32:05,486 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data/7d68eb4d8/729a1829f33443ca8f2a1947ad9a0514/FLAGd1258572a [2023-11-06 22:32:05,502 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data/7d68eb4d8/729a1829f33443ca8f2a1947ad9a0514 [2023-11-06 22:32:05,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:32:05,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:32:05,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:05,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:32:05,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:32:05,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:05" (1/1) ... [2023-11-06 22:32:05,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d20b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:05, skipping insertion in model container [2023-11-06 22:32:05,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:05" (1/1) ... [2023-11-06 22:32:05,541 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:05,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:05,760 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-06 22:32:05,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a2f6a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:05, skipping insertion in model container [2023-11-06 22:32:05,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:05,762 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:32:05,764 INFO L158 Benchmark]: Toolchain (without parser) took 256.00ms. Allocated memory is still 127.9MB. Free memory was 82.1MB in the beginning and 72.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:32:05,765 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 127.9MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:32:05,766 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.99ms. Allocated memory is still 127.9MB. Free memory was 82.1MB in the beginning and 72.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:32:05,769 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 127.9MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.99ms. Allocated memory is still 127.9MB. Free memory was 82.1MB in the beginning and 72.9MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:32:08,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:32:08,535 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2023-11-06 22:32:08,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:32:08,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:32:08,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:32:08,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:32:08,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:32:08,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:32:08,601 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:32:08,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:32:08,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:32:08,603 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:32:08,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:32:08,605 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:32:08,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:32:08,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:32:08,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:32:08,607 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:32:08,608 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:32:08,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:32:08,609 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:32:08,609 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:32:08,610 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:32:08,610 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:32:08,610 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:32:08,611 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:32:08,612 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:32:08,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:32:08,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:32:08,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:08,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:32:08,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:32:08,615 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:32:08,615 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:08,615 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:32:08,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:32:08,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:32:08,616 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:32:08,617 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:32:08,617 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_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2023-11-06 22:32:09,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:32:09,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:32:09,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:32:09,071 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:32:09,071 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:32:09,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/verifythis/tree_max.c [2023-11-06 22:32:12,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:32:12,498 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:32:12,499 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/sv-benchmarks/c/verifythis/tree_max.c [2023-11-06 22:32:12,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data/2252c0f69/c807414de2964b4db8d6df1da1e3c73a/FLAG4a68ba9f6 [2023-11-06 22:32:12,532 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/data/2252c0f69/c807414de2964b4db8d6df1da1e3c73a [2023-11-06 22:32:12,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:32:12,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:32:12,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:12,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:32:12,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:32:12,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:12,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e05180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12, skipping insertion in model container [2023-11-06 22:32:12,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:12,579 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:12,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:12,829 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:32:12,838 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:32:12,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:12,879 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:32:12,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:32:12,951 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:32:12,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12 WrapperNode [2023-11-06 22:32:12,952 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:32:12,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:32:12,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:32:12,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:32:12,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:12,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,015 INFO L138 Inliner]: procedures = 26, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 38 [2023-11-06 22:32:13,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:32:13,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:32:13,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:32:13,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:32:13,029 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,056 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,060 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,062 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,064 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,069 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:32:13,079 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:32:13,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:32:13,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:32:13,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (1/1) ... [2023-11-06 22:32:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:32:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:13,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:32:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:32:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:32:13,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:32:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:32:13,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:32:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:32:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-06 22:32:13,164 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-06 22:32:13,164 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2023-11-06 22:32:13,165 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2023-11-06 22:32:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-11-06 22:32:13,165 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-11-06 22:32:13,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:32:13,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:32:13,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:32:13,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:32:13,269 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:32:13,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:32:13,790 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:32:13,797 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:32:13,797 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:32:13,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:13 BoogieIcfgContainer [2023-11-06 22:32:13,800 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:32:13,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:32:13,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:32:13,806 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:32:13,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:32:12" (1/3) ... [2023-11-06 22:32:13,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcbc930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:13, skipping insertion in model container [2023-11-06 22:32:13,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:12" (2/3) ... [2023-11-06 22:32:13,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcbc930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:13, skipping insertion in model container [2023-11-06 22:32:13,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:13" (3/3) ... [2023-11-06 22:32:13,809 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2023-11-06 22:32:13,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:32:13,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-06 22:32:13,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:32:13,884 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;@6fd33859, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:32:13,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-06 22:32:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 61 states have internal predecessors, (68), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:32:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 22:32:13,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:13,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:32:13,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:13,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1983813164, now seen corresponding path program 1 times [2023-11-06 22:32:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178652559] [2023-11-06 22:32:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:13,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:13,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:13,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:32:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:14,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:32:14,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:14,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:14,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:14,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178652559] [2023-11-06 22:32:14,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178652559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:14,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:14,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:32:14,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224876360] [2023-11-06 22:32:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:14,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:14,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:14,194 INFO L87 Difference]: Start difference. First operand has 74 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 61 states have internal predecessors, (68), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:14,409 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-11-06 22:32:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 22:32:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:14,423 INFO L225 Difference]: With dead ends: 74 [2023-11-06 22:32:14,424 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 22:32:14,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:14,431 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:14,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:32:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 22:32:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-11-06 22:32:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 57 states have internal predecessors, (63), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:32:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2023-11-06 22:32:14,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 6 [2023-11-06 22:32:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:14,492 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2023-11-06 22:32:14,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2023-11-06 22:32:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 22:32:14,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:14,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:32:14,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:14,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:14,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1983813163, now seen corresponding path program 1 times [2023-11-06 22:32:14,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738762695] [2023-11-06 22:32:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:14,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:14,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:14,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:32:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:14,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:32:14,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:14,782 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 5 [2023-11-06 22:32:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:14,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:14,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738762695] [2023-11-06 22:32:14,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738762695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:14,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:14,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:32:14,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591315432] [2023-11-06 22:32:14,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:14,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:14,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:14,815 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:14,940 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2023-11-06 22:32:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 22:32:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:14,943 INFO L225 Difference]: With dead ends: 69 [2023-11-06 22:32:14,943 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 22:32:14,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:14,945 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:14,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:32:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 22:32:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-06 22:32:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 56 states have internal predecessors, (62), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 22:32:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2023-11-06 22:32:14,956 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 6 [2023-11-06 22:32:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:14,957 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2023-11-06 22:32:14,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2023-11-06 22:32:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:32:14,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:14,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:14,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:15,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:15,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:15,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1198792581, now seen corresponding path program 1 times [2023-11-06 22:32:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:15,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344854325] [2023-11-06 22:32:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:15,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:15,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:15,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:15,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:32:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:15,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:32:15,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:15,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:15,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344854325] [2023-11-06 22:32:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344854325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:15,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:15,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:32:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753004032] [2023-11-06 22:32:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:32:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:32:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:32:15,426 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:32:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:15,611 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2023-11-06 22:32:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:32:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 22:32:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:15,616 INFO L225 Difference]: With dead ends: 82 [2023-11-06 22:32:15,617 INFO L226 Difference]: Without dead ends: 82 [2023-11-06 22:32:15,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:32:15,621 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 9 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:15,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 441 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:32:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-06 22:32:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2023-11-06 22:32:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 62 states have internal predecessors, (67), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-06 22:32:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2023-11-06 22:32:15,637 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 12 [2023-11-06 22:32:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:15,638 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2023-11-06 22:32:15,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:32:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2023-11-06 22:32:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:32:15,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:15,639 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:15,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:15,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:15,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:15,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 880178559, now seen corresponding path program 1 times [2023-11-06 22:32:15,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570402215] [2023-11-06 22:32:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:15,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:15,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:15,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:15,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:32:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:15,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:32:15,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:15,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:32:16,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:16,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570402215] [2023-11-06 22:32:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570402215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:16,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:16,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:32:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006374178] [2023-11-06 22:32:16,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:16,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:32:16,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:32:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:16,038 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:32:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:16,354 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2023-11-06 22:32:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:32:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-06 22:32:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:16,356 INFO L225 Difference]: With dead ends: 81 [2023-11-06 22:32:16,356 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 22:32:16,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:16,357 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:16,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 40 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:32:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 22:32:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2023-11-06 22:32:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 62 states have internal predecessors, (71), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-06 22:32:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2023-11-06 22:32:16,379 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 18 [2023-11-06 22:32:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:16,379 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2023-11-06 22:32:16,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:32:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2023-11-06 22:32:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 22:32:16,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:16,390 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:16,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:16,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:16,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:16,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1246038066, now seen corresponding path program 1 times [2023-11-06 22:32:16,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:16,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373983337] [2023-11-06 22:32:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:16,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:16,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:16,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:32:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:16,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:32:16,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:16,688 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 5 [2023-11-06 22:32:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:16,749 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:16,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373983337] [2023-11-06 22:32:16,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373983337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:16,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:16,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:32:16,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711002566] [2023-11-06 22:32:16,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:16,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:32:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:32:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:16,752 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:32:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:17,081 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2023-11-06 22:32:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:32:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-06 22:32:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:17,084 INFO L225 Difference]: With dead ends: 85 [2023-11-06 22:32:17,084 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 22:32:17,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:17,085 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:17,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:32:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 22:32:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2023-11-06 22:32:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.5) internal successors, (72), 64 states have internal predecessors, (72), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-06 22:32:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2023-11-06 22:32:17,096 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 13 [2023-11-06 22:32:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:17,096 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2023-11-06 22:32:17,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:32:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2023-11-06 22:32:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:32:17,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:17,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:17,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:17,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:17,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:17,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1947210054, now seen corresponding path program 1 times [2023-11-06 22:32:17,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:17,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092581346] [2023-11-06 22:32:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:17,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:17,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:17,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:32:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:17,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:32:17,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:17,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:17,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:17,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092581346] [2023-11-06 22:32:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092581346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:17,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:17,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:32:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141919995] [2023-11-06 22:32:17,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:17,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:32:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:32:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:32:17,512 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:32:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:17,635 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2023-11-06 22:32:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:32:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:32:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:17,638 INFO L225 Difference]: With dead ends: 91 [2023-11-06 22:32:17,638 INFO L226 Difference]: Without dead ends: 91 [2023-11-06 22:32:17,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:32:17,639 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 8 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:17,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 441 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:32:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-06 22:32:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2023-11-06 22:32:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 68 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-06 22:32:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2023-11-06 22:32:17,661 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 18 [2023-11-06 22:32:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:17,662 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2023-11-06 22:32:17,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:32:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2023-11-06 22:32:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 22:32:17,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:17,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:17,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:17,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:17,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:17,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1537989614, now seen corresponding path program 1 times [2023-11-06 22:32:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:17,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511430213] [2023-11-06 22:32:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:17,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:17,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:17,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:32:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:17,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:32:17,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:32:17,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:17,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:17,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511430213] [2023-11-06 22:32:17,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511430213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:17,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:17,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:32:17,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68424750] [2023-11-06 22:32:17,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:17,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:32:17,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:32:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:17,982 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:32:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:18,240 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2023-11-06 22:32:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:32:18,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-06 22:32:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:18,242 INFO L225 Difference]: With dead ends: 90 [2023-11-06 22:32:18,242 INFO L226 Difference]: Without dead ends: 76 [2023-11-06 22:32:18,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:32:18,243 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:18,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 48 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:32:18,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-06 22:32:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-06 22:32:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 60 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-06 22:32:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-11-06 22:32:18,252 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 21 [2023-11-06 22:32:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:18,252 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-11-06 22:32:18,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:32:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-11-06 22:32:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 22:32:18,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:18,254 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:18,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:18,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:18,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:18,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash -10601929, now seen corresponding path program 1 times [2023-11-06 22:32:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683343873] [2023-11-06 22:32:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:18,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:18,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:18,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:32:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:18,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:32:18,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:18,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:18,759 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base (select |c_#valid| nondet_tree_~n~0.base))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2023-11-06 22:32:18,929 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:32:18,929 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:32:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2023-11-06 22:32:18,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:19,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683343873] [2023-11-06 22:32:19,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683343873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [73916103] [2023-11-06 22:32:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:19,149 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:19,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:32:19,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:32:19,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-11-06 22:32:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:19,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:32:19,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:19,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:19,492 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2023-11-06 22:32:19,572 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:32:19,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:32:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2023-11-06 22:32:19,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [73916103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:19,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:19,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-11-06 22:32:19,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991156012] [2023-11-06 22:32:19,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:19,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:32:19,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:32:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=14, Unknown=2, NotChecked=14, Total=42 [2023-11-06 22:32:19,735 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 22:32:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:20,120 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2023-11-06 22:32:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:32:20,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2023-11-06 22:32:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:20,122 INFO L225 Difference]: With dead ends: 83 [2023-11-06 22:32:20,123 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 22:32:20,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=19, Unknown=3, NotChecked=18, Total=56 [2023-11-06 22:32:20,124 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:20,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 145 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2023-11-06 22:32:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 22:32:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2023-11-06 22:32:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 63 states have internal predecessors, (72), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-06 22:32:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2023-11-06 22:32:20,133 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 34 [2023-11-06 22:32:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:20,134 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2023-11-06 22:32:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 22:32:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2023-11-06 22:32:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 22:32:20,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:20,136 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:20,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:20,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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 22:32:20,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:20,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:20,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:20,540 INFO L85 PathProgramCache]: Analyzing trace with hash 623255922, now seen corresponding path program 1 times [2023-11-06 22:32:20,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:20,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077105734] [2023-11-06 22:32:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:20,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:20,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:20,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:32:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:20,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:32:20,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:20,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:20,826 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 5 [2023-11-06 22:32:20,902 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (select |c_#length| nondet_tree_~n~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2023-11-06 22:32:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:21,045 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 14 treesize of output 9 [2023-11-06 22:32:21,057 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:32:21,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:32:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2023-11-06 22:32:21,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:21,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077105734] [2023-11-06 22:32:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077105734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388731657] [2023-11-06 22:32:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:32:21,796 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:32:21,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-11-06 22:32:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:22,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:32:22,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:22,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:22,179 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 5 [2023-11-06 22:32:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:32:22,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:32:22,412 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:32:22,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:32:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2023-11-06 22:32:22,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388731657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:26,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:26,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2023-11-06 22:32:26,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281685717] [2023-11-06 22:32:26,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:26,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:32:26,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:32:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=39, Unknown=1, NotChecked=12, Total=72 [2023-11-06 22:32:26,657 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:32:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:27,093 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2023-11-06 22:32:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:32:27,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2023-11-06 22:32:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:27,095 INFO L225 Difference]: With dead ends: 87 [2023-11-06 22:32:27,095 INFO L226 Difference]: Without dead ends: 87 [2023-11-06 22:32:27,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=26, Invalid=49, Unknown=1, NotChecked=14, Total=90 [2023-11-06 22:32:27,096 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:27,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 47 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 144 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2023-11-06 22:32:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-06 22:32:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-06 22:32:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.489795918367347) internal successors, (73), 65 states have internal predecessors, (73), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (20), 14 states have call predecessors, (20), 11 states have call successors, (20) [2023-11-06 22:32:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-11-06 22:32:27,106 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 41 [2023-11-06 22:32:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:27,106 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-11-06 22:32:27,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:32:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-11-06 22:32:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:32:27,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:27,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:27,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:27,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:27,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:27,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:27,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1510541619, now seen corresponding path program 1 times [2023-11-06 22:32:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:27,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719495236] [2023-11-06 22:32:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:27,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:27,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:27,531 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:27,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:32:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:27,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:32:27,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:27,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:32:27,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:32:28,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719495236] [2023-11-06 22:32:28,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719495236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:28,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:28,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-06 22:32:28,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499974905] [2023-11-06 22:32:28,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:28,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:32:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:32:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:32:28,066 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:32:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:29,170 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2023-11-06 22:32:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:32:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-11-06 22:32:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:29,174 INFO L225 Difference]: With dead ends: 98 [2023-11-06 22:32:29,174 INFO L226 Difference]: Without dead ends: 98 [2023-11-06 22:32:29,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:32:29,175 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 175 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:29,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 67 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:32:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-06 22:32:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-11-06 22:32:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.423728813559322) internal successors, (84), 72 states have internal predecessors, (84), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (22), 15 states have call predecessors, (22), 13 states have call successors, (22) [2023-11-06 22:32:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2023-11-06 22:32:29,184 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 28 [2023-11-06 22:32:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:29,184 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2023-11-06 22:32:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:32:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2023-11-06 22:32:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:32:29,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:29,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:29,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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 22:32:29,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:29,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:29,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:29,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1510541620, now seen corresponding path program 1 times [2023-11-06 22:32:29,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:29,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352218130] [2023-11-06 22:32:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:29,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:29,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:29,411 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:29,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:32:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:29,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:32:29,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:29,575 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 5 [2023-11-06 22:32:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:32:29,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:32:31,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:31,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352218130] [2023-11-06 22:32:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352218130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:32:31,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:31,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-06 22:32:31,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954121587] [2023-11-06 22:32:31,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:31,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:32:31,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:32:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:32:31,427 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 22:32:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:34,145 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2023-11-06 22:32:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:32:34,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-11-06 22:32:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:34,149 INFO L225 Difference]: With dead ends: 115 [2023-11-06 22:32:34,149 INFO L226 Difference]: Without dead ends: 115 [2023-11-06 22:32:34,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:32:34,150 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 169 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:34,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 128 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:32:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-06 22:32:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2023-11-06 22:32:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 84 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (25), 18 states have call predecessors, (25), 16 states have call successors, (25) [2023-11-06 22:32:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2023-11-06 22:32:34,160 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 28 [2023-11-06 22:32:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:34,161 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2023-11-06 22:32:34,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 22:32:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2023-11-06 22:32:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 22:32:34,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:34,163 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-06 22:32:34,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:34,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:34,376 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:34,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:34,377 INFO L85 PathProgramCache]: Analyzing trace with hash -671550736, now seen corresponding path program 2 times [2023-11-06 22:32:34,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:34,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242149090] [2023-11-06 22:32:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:32:34,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:34,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:34,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:32:34,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:32:34,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:34,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:32:34,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:34,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:34,682 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 5 [2023-11-06 22:32:34,758 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (select |c_#length| nondet_tree_~n~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2023-11-06 22:32:34,841 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2023-11-06 22:32:35,253 INFO L322 Elim1Store]: treesize reduction 56, result has 28.2 percent of original size [2023-11-06 22:32:35,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 76 [2023-11-06 22:32:35,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:35,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 55 [2023-11-06 22:32:36,314 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:32:36,375 INFO L322 Elim1Store]: treesize reduction 91, result has 8.1 percent of original size [2023-11-06 22:32:36,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 25 [2023-11-06 22:32:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:32:36,473 INFO L322 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2023-11-06 22:32:36,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 12 [2023-11-06 22:32:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 24 not checked. [2023-11-06 22:32:36,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:37,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:37,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242149090] [2023-11-06 22:32:37,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242149090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:37,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [206197655] [2023-11-06 22:32:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:32:37,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:37,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:32:37,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:32:37,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-11-06 22:32:37,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:32:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:32:37,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:32:37,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:37,598 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 5 [2023-11-06 22:32:37,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:32:38,107 INFO L322 Elim1Store]: treesize reduction 56, result has 28.2 percent of original size [2023-11-06 22:32:38,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 76 [2023-11-06 22:32:38,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:32:38,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 55 [2023-11-06 22:32:39,261 INFO L322 Elim1Store]: treesize reduction 252, result has 24.8 percent of original size [2023-11-06 22:32:39,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 69 treesize of output 152 [2023-11-06 22:32:42,972 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:32:43,044 INFO L322 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2023-11-06 22:32:43,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 33 [2023-11-06 22:32:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 24 not checked. [2023-11-06 22:32:43,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:32:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [206197655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:44,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:32:44,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-11-06 22:32:44,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681170976] [2023-11-06 22:32:44,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:32:44,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:32:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:32:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=54, Unknown=2, NotChecked=30, Total=110 [2023-11-06 22:32:44,024 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-06 22:32:46,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:32:48,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:32:50,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:32:53,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:32:56,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 22:32:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:56,684 INFO L93 Difference]: Finished difference Result 121 states and 166 transitions. [2023-11-06 22:32:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:32:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2023-11-06 22:32:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:56,688 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:32:56,688 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:32:56,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=106, Unknown=2, NotChecked=46, Total=210 [2023-11-06 22:32:56,689 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:56,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 58 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 11 Unknown, 230 Unchecked, 12.2s Time] [2023-11-06 22:32:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:32:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2023-11-06 22:32:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.368421052631579) internal successors, (104), 89 states have internal predecessors, (104), 17 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (34), 20 states have call predecessors, (34), 17 states have call successors, (34) [2023-11-06 22:32:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2023-11-06 22:32:56,700 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 50 [2023-11-06 22:32:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:56,701 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2023-11-06 22:32:56,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-06 22:32:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2023-11-06 22:32:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 22:32:56,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:56,703 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:56,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:56,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:57,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt [2023-11-06 22:32:57,116 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:57,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1116327934, now seen corresponding path program 1 times [2023-11-06 22:32:57,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:57,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277095883] [2023-11-06 22:32:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:57,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:57,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:57,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:57,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:32:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:57,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:32:57,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:32:57,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:57,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:32:57,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277095883] [2023-11-06 22:32:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277095883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:57,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:57,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:32:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106577424] [2023-11-06 22:32:57,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:57,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:32:57,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:32:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:32:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:32:57,393 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:32:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:57,715 INFO L93 Difference]: Finished difference Result 121 states and 164 transitions. [2023-11-06 22:32:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:32:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-11-06 22:32:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:57,717 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:32:57,717 INFO L226 Difference]: Without dead ends: 117 [2023-11-06 22:32:57,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:32:57,718 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:57,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 378 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:32:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-06 22:32:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2023-11-06 22:32:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 89 states have internal predecessors, (102), 17 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (34), 20 states have call predecessors, (34), 17 states have call successors, (34) [2023-11-06 22:32:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 153 transitions. [2023-11-06 22:32:57,733 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 153 transitions. Word has length 34 [2023-11-06 22:32:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:57,734 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 153 transitions. [2023-11-06 22:32:57,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:32:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 153 transitions. [2023-11-06 22:32:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 22:32:57,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:57,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:57,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:57,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:32:57,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1789484592, now seen corresponding path program 1 times [2023-11-06 22:32:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:32:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471923095] [2023-11-06 22:32:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:57,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:32:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:32:57,950 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:32:57,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:32:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:58,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:32:58,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:58,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-06 22:32:58,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-06 22:32:58,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2023-11-06 22:32:58,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2023-11-06 22:32:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:32:58,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:33:00,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471923095] [2023-11-06 22:33:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471923095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:00,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:00,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2023-11-06 22:33:00,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290961330] [2023-11-06 22:33:00,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:00,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:33:00,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:33:00,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:33:00,284 INFO L87 Difference]: Start difference. First operand 115 states and 153 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 22:33:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:02,691 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2023-11-06 22:33:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:33:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2023-11-06 22:33:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:02,694 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:33:02,694 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 22:33:02,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:33:02,696 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:02,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 276 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:33:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 22:33:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2023-11-06 22:33:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 92 states have internal predecessors, (105), 17 states have call successors, (17), 6 states have call predecessors, (17), 9 states have return successors, (34), 20 states have call predecessors, (34), 17 states have call successors, (34) [2023-11-06 22:33:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2023-11-06 22:33:02,713 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 34 [2023-11-06 22:33:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:02,714 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2023-11-06 22:33:02,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 22:33:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2023-11-06 22:33:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:33:02,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:02,719 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:02,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:02,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:02,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:33:02,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1851841044, now seen corresponding path program 2 times [2023-11-06 22:33:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:02,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674596255] [2023-11-06 22:33:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:02,946 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:33:02,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:33:03,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:03,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:03,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:33:03,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 22:33:03,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:03,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-06 22:33:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 22:33:04,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:33:04,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674596255] [2023-11-06 22:33:04,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674596255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:04,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:33:04,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-06 22:33:04,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004989818] [2023-11-06 22:33:04,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:04,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:33:04,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:33:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:33:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:33:04,110 INFO L87 Difference]: Start difference. First operand 119 states and 156 transitions. Second operand has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-06 22:33:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:05,865 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2023-11-06 22:33:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:33:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2023-11-06 22:33:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:05,868 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:33:05,868 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:33:05,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:33:05,869 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 52 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:05,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 592 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:33:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:33:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2023-11-06 22:33:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 92 states have internal predecessors, (102), 17 states have call successors, (17), 6 states have call predecessors, (17), 9 states have return successors, (34), 20 states have call predecessors, (34), 17 states have call successors, (34) [2023-11-06 22:33:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2023-11-06 22:33:05,878 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 44 [2023-11-06 22:33:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:05,878 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2023-11-06 22:33:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-06 22:33:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2023-11-06 22:33:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:33:05,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:05,880 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2023-11-06 22:33:05,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-06 22:33:06,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:06,093 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-06 22:33:06,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash -977818845, now seen corresponding path program 1 times [2023-11-06 22:33:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:33:06,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809987229] [2023-11-06 22:33:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:06,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:33:06,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:33:06,095 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:33:06,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b34b802e-c0f0-412e-b0ef-e5f9a137c4b0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:33:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:06,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:33:06,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:06,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:33:06,496 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 5 [2023-11-06 22:33:06,623 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (select |c_#length| nondet_tree_~n~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2023-11-06 22:33:06,709 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2023-11-06 22:33:06,817 WARN L861 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_69 (_ BitVec 32))) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_69 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2023-11-06 22:33:10,129 INFO L322 Elim1Store]: treesize reduction 176, result has 20.4 percent of original size [2023-11-06 22:33:10,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 178 [2023-11-06 22:33:10,483 INFO L217 Elim1Store]: Index analysis took 204 ms [2023-11-06 22:33:11,143 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:33:11,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 96 [2023-11-06 22:33:43,578 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:43,589 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:43,591 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:43,595 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:44,385 INFO L322 Elim1Store]: treesize reduction 319, result has 0.3 percent of original size [2023-11-06 22:33:44,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 14 case distinctions, treesize of input 59 treesize of output 48 [2023-11-06 22:33:44,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:33:44,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:44,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:33:44,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:34:03,586 WARN L293 SmtUtils]: Spent 19.02s on a formula simplification. DAG size of input: 166 DAG size of output: 52 (called from [L 319] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-06 22:34:03,587 INFO L322 Elim1Store]: treesize reduction 546, result has 12.1 percent of original size [2023-11-06 22:34:03,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 1328134 treesize of output 918605 [2023-11-06 22:34:09,778 WARN L293 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 829 DAG size of output: 699 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)