./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:34:34,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:34:34,521 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 15:34:34,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:34:34,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:34:34,552 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:34:34,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:34:34,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:34:34,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:34:34,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:34:34,555 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:34:34,555 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:34:34,556 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:34:34,556 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:34:34,557 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:34:34,557 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:34:34,558 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:34:34,559 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:34:34,559 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:34:34,560 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:34:34,560 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:34:34,561 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:34:34,562 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:34:34,562 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:34:34,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:34:34,563 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:34:34,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:34:34,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:34:34,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:34:34,565 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:34:34,565 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:34:34,566 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:34:34,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:34:34,566 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:34:34,566 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:34:34,566 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:34:34,567 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:34:34,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:34:34,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:34:34,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:34:34,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:34,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:34:34,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:34:34,568 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:34:34,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:34:34,569 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:34:34,569 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:34:34,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:34:34,569 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d [2023-12-02 15:34:34,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:34:34,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:34:34,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:34:34,816 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:34:34,817 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:34:34,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2023-12-02 15:34:37,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:34:37,785 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:34:37,786 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2023-12-02 15:34:37,802 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data/cc38e2988/ef71f5c906324b5fbd456fa55acadb72/FLAG3a6a3ae53 [2023-12-02 15:34:37,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data/cc38e2988/ef71f5c906324b5fbd456fa55acadb72 [2023-12-02 15:34:37,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:34:37,819 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:34:37,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:37,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:34:37,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:34:37,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:37" (1/1) ... [2023-12-02 15:34:37,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a772b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:37, skipping insertion in model container [2023-12-02 15:34:37,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:37" (1/1) ... [2023-12-02 15:34:37,881 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:34:38,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:38,249 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) [2023-12-02 15:34:38,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9b73bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:38, skipping insertion in model container [2023-12-02 15:34:38,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:38,250 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 15:34:38,252 INFO L158 Benchmark]: Toolchain (without parser) took 432.63ms. Allocated memory is still 142.6MB. Free memory was 98.5MB in the beginning and 84.5MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 15:34:38,252 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 142.6MB. Free memory is still 115.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 15:34:38,253 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.93ms. Allocated memory is still 142.6MB. Free memory was 98.3MB in the beginning and 84.5MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 15:34:38,254 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 142.6MB. Free memory is still 115.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.93ms. Allocated memory is still 142.6MB. Free memory was 98.3MB in the beginning and 84.5MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:34:40,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:34:40,121 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 15:34:40,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:34:40,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:34:40,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:34:40,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:34:40,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:34:40,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:34:40,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:34:40,160 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:34:40,160 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:34:40,161 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:34:40,161 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:34:40,162 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:34:40,163 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:34:40,163 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:34:40,164 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:34:40,165 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:34:40,165 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:34:40,166 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:34:40,166 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:34:40,167 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:34:40,167 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:34:40,168 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:34:40,168 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:34:40,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:34:40,169 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:34:40,170 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 15:34:40,170 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 15:34:40,171 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:34:40,171 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:34:40,171 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:34:40,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:34:40,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 15:34:40,172 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:34:40,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:34:40,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:40,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:34:40,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:34:40,173 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 15:34:40,174 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:40,174 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:34:40,174 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:34:40,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:34:40,175 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> beb004be26a355c223f1a45515f5377c37b18fc46f09e77727f89b964ae9789d [2023-12-02 15:34:40,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:34:40,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:34:40,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:34:40,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:34:40,540 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:34:40,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2023-12-02 15:34:43,338 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:34:43,608 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:34:43,609 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-2.i [2023-12-02 15:34:43,626 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data/662ad75cb/19314907b69e4acba8a34519876b4140/FLAGc977f8c2d [2023-12-02 15:34:43,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/data/662ad75cb/19314907b69e4acba8a34519876b4140 [2023-12-02 15:34:43,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:34:43,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:34:43,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:43,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:34:43,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:34:43,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:43" (1/1) ... [2023-12-02 15:34:43,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238a169c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:43, skipping insertion in model container [2023-12-02 15:34:43,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:43" (1/1) ... [2023-12-02 15:34:43,708 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:34:44,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:44,147 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 15:34:44,158 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:34:44,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:44,212 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:34:44,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:44,334 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 15:34:44,341 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:34:44,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44 WrapperNode [2023-12-02 15:34:44,341 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:44,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:34:44,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:34:44,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:34:44,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,395 INFO L138 Inliner]: procedures = 165, calls = 71, calls flagged for inlining = 23, calls inlined = 17, statements flattened = 122 [2023-12-02 15:34:44,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:34:44,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:34:44,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:34:44,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:34:44,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,425 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,428 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:34:44,437 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:34:44,438 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:34:44,438 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:34:44,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (1/1) ... [2023-12-02 15:34:44,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:44,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:34:44,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:34:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 15:34:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-12-02 15:34:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-12-02 15:34:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 15:34:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 15:34:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2023-12-02 15:34:44,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2023-12-02 15:34:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:34:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:34:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 15:34:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 15:34:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 15:34:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:34:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 15:34:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:34:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:34:44,672 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:34:44,674 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:34:45,098 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:34:45,150 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:34:45,150 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 15:34:45,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:34:45 BoogieIcfgContainer [2023-12-02 15:34:45,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:34:45,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:34:45,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:34:45,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:34:45,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:34:43" (1/3) ... [2023-12-02 15:34:45,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a7357a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:34:45, skipping insertion in model container [2023-12-02 15:34:45,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:44" (2/3) ... [2023-12-02 15:34:45,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a7357a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:34:45, skipping insertion in model container [2023-12-02 15:34:45,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:34:45" (3/3) ... [2023-12-02 15:34:45,160 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2-2.i [2023-12-02 15:34:45,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:34:45,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-12-02 15:34:45,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:34:45,228 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=FINITE_AUTOMATA, 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;@3d3161d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:34:45,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-12-02 15:34:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 1.85) internal successors, (74), 66 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:34:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:34:45,240 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:45,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:45,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:45,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 221509190, now seen corresponding path program 1 times [2023-12-02 15:34:45,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:45,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980371441] [2023-12-02 15:34:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:45,261 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 [2023-12-02 15:34:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:45,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:45,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:34:45,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:45,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:34:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:45,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:45,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:45,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980371441] [2023-12-02 15:34:45,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980371441] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:45,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:45,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244711102] [2023-12-02 15:34:45,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:45,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:34:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:34:45,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:45,529 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 1.85) internal successors, (74), 66 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:46,006 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2023-12-02 15:34:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:34:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 15:34:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:46,017 INFO L225 Difference]: With dead ends: 90 [2023-12-02 15:34:46,017 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 15:34:46,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:46,022 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 23 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:46,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 227 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:34:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 15:34:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-12-02 15:34:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 69 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:34:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-12-02 15:34:46,059 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 9 [2023-12-02 15:34:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:46,060 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-12-02 15:34:46,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-12-02 15:34:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:34:46,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:46,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:46,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:46,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:46,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:46,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 250138341, now seen corresponding path program 1 times [2023-12-02 15:34:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:46,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285076823] [2023-12-02 15:34:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:46,265 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 [2023-12-02 15:34:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:46,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:46,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:46,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:46,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:46,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:46,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285076823] [2023-12-02 15:34:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285076823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:46,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:46,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:46,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218919155] [2023-12-02 15:34:46,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:46,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:46,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:46,389 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:46,594 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-12-02 15:34:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 15:34:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:46,597 INFO L225 Difference]: With dead ends: 76 [2023-12-02 15:34:46,597 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 15:34:46,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:46,599 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:46,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 269 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 15:34:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2023-12-02 15:34:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.744186046511628) internal successors, (75), 67 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:34:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-12-02 15:34:46,609 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 9 [2023-12-02 15:34:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:46,610 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-12-02 15:34:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-12-02 15:34:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:34:46,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:46,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:46,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:46,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1723149653, now seen corresponding path program 1 times [2023-12-02 15:34:46,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:46,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728758617] [2023-12-02 15:34:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:46,815 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 [2023-12-02 15:34:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:46,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:46,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:46,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:34:46,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:46,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:34:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:47,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:47,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:47,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728758617] [2023-12-02 15:34:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728758617] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:47,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:34:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496974054] [2023-12-02 15:34:47,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:47,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:34:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:34:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:47,029 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:47,492 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-12-02 15:34:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:34:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 15:34:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:47,494 INFO L225 Difference]: With dead ends: 75 [2023-12-02 15:34:47,494 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 15:34:47,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:34:47,496 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:47,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 287 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:34:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 15:34:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-12-02 15:34:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 66 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:34:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-12-02 15:34:47,506 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 10 [2023-12-02 15:34:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:47,507 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-12-02 15:34:47,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-12-02 15:34:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:34:47,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:47,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:47,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:47,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:47,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:47,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1878058420, now seen corresponding path program 1 times [2023-12-02 15:34:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:47,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258050107] [2023-12-02 15:34:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:47,717 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 [2023-12-02 15:34:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:47,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:47,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:47,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:47,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:47,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:47,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258050107] [2023-12-02 15:34:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258050107] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:47,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:47,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215152333] [2023-12-02 15:34:47,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:47,825 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:48,007 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-12-02 15:34:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:48,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 15:34:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:48,011 INFO L225 Difference]: With dead ends: 75 [2023-12-02 15:34:48,012 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 15:34:48,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:48,014 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:48,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 242 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 15:34:48,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-12-02 15:34:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 43 states have (on average 1.697674418604651) internal successors, (73), 66 states have internal predecessors, (73), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:34:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-12-02 15:34:48,023 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 11 [2023-12-02 15:34:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:48,023 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-12-02 15:34:48,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-12-02 15:34:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:34:48,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:48,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:48,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:48,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:48,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -135248085, now seen corresponding path program 1 times [2023-12-02 15:34:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871691698] [2023-12-02 15:34:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:48,228 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 [2023-12-02 15:34:48,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:48,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:48,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:48,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:34:48,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:48,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:48,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:48,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871691698] [2023-12-02 15:34:48,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871691698] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:48,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:48,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:34:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684446513] [2023-12-02 15:34:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:48,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:48,319 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:48,464 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-12-02 15:34:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 15:34:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:48,466 INFO L225 Difference]: With dead ends: 83 [2023-12-02 15:34:48,466 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 15:34:48,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:48,467 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:48,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 193 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 15:34:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2023-12-02 15:34:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:34:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2023-12-02 15:34:48,475 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 11 [2023-12-02 15:34:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:48,476 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2023-12-02 15:34:48,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2023-12-02 15:34:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:34:48,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:48,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:48,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 15:34:48,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:48,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:48,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2102371893, now seen corresponding path program 1 times [2023-12-02 15:34:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:48,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802786474] [2023-12-02 15:34:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:48,679 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 [2023-12-02 15:34:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:48,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:48,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:48,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:34:48,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:48,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:48,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:48,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802786474] [2023-12-02 15:34:48,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802786474] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:48,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:48,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:34:48,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044282845] [2023-12-02 15:34:48,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:48,759 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:48,862 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-12-02 15:34:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 15:34:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:48,863 INFO L225 Difference]: With dead ends: 77 [2023-12-02 15:34:48,863 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 15:34:48,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:48,864 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:48,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 15:34:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-02 15:34:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:34:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2023-12-02 15:34:48,872 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 14 [2023-12-02 15:34:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:48,873 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2023-12-02 15:34:48,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2023-12-02 15:34:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:34:48,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:48,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:48,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:49,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:49,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:49,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2005175127, now seen corresponding path program 1 times [2023-12-02 15:34:49,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:49,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843868164] [2023-12-02 15:34:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:49,078 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 [2023-12-02 15:34:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:49,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:49,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:49,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:34:49,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:49,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:49,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:49,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843868164] [2023-12-02 15:34:49,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843868164] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:49,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:49,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:34:49,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134120177] [2023-12-02 15:34:49,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:34:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:34:49,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:49,245 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-12-02 15:34:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:49,509 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2023-12-02 15:34:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:34:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 15 [2023-12-02 15:34:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:49,512 INFO L225 Difference]: With dead ends: 89 [2023-12-02 15:34:49,512 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 15:34:49,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:49,514 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:49,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 309 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 15:34:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2023-12-02 15:34:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.6) internal successors, (80), 74 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2023-12-02 15:34:49,524 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 15 [2023-12-02 15:34:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:49,524 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2023-12-02 15:34:49,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-12-02 15:34:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2023-12-02 15:34:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:34:49,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:49,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:49,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:49,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:49,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:49,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash 632561396, now seen corresponding path program 1 times [2023-12-02 15:34:49,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:49,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775380543] [2023-12-02 15:34:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:49,732 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 [2023-12-02 15:34:49,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:49,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:49,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:49,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:49,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:49,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:49,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775380543] [2023-12-02 15:34:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775380543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110830148] [2023-12-02 15:34:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:49,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:49,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:49,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-02 15:34:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:50,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:50,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:50,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:50,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110830148] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:50,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970420853] [2023-12-02 15:34:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:50,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:50,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:50,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:34:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:50,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:34:50,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:50,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:34:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:50,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:50,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970420853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:50,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:34:50,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5, 5] total 14 [2023-12-02 15:34:50,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126485161] [2023-12-02 15:34:50,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:50,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:34:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:34:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:34:50,235 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:50,650 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-12-02 15:34:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:34:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 15:34:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:50,651 INFO L225 Difference]: With dead ends: 83 [2023-12-02 15:34:50,651 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 15:34:50,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:34:50,652 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:50,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 288 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 15:34:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 15:34:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.58) internal successors, (79), 73 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-12-02 15:34:50,659 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 15 [2023-12-02 15:34:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:50,659 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-12-02 15:34:50,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-12-02 15:34:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:34:50,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:50,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:50,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2023-12-02 15:34:50,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:34:51,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 15:34:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:51,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:51,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 632561397, now seen corresponding path program 1 times [2023-12-02 15:34:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142486157] [2023-12-02 15:34:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:51,262 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 [2023-12-02 15:34:51,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:51,263 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:51,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 15:34:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:51,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:51,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:51,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:51,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:51,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142486157] [2023-12-02 15:34:51,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142486157] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:51,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1758605364] [2023-12-02 15:34:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:51,423 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:51,424 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:51,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 15:34:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:51,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:51,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:51,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1758605364] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358340236] [2023-12-02 15:34:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:51,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:51,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:51,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:51,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:34:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:51,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:51,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:51,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358340236] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:51,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:34:51,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-12-02 15:34:51,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899007188] [2023-12-02 15:34:51,728 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:34:51,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:34:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:51,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:34:51,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:51,729 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:51,973 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2023-12-02 15:34:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:34:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 15:34:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:51,975 INFO L225 Difference]: With dead ends: 86 [2023-12-02 15:34:51,975 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 15:34:51,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:34:51,976 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 8 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:51,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 315 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 15:34:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-02 15:34:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-12-02 15:34:51,983 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 15 [2023-12-02 15:34:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:51,988 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-12-02 15:34:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-12-02 15:34:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 15:34:51,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:51,992 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:51,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 15:34:52,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 15:34:52,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:34:52,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:52,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:52,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:52,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1358471690, now seen corresponding path program 2 times [2023-12-02 15:34:52,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:52,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965612087] [2023-12-02 15:34:52,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:34:52,596 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 [2023-12-02 15:34:52,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:52,597 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:52,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:52,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:34:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:52,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 15:34:52,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:52,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:34:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:34:52,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:52,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965612087] [2023-12-02 15:34:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965612087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:52,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:34:52,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256292397] [2023-12-02 15:34:52,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:34:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:34:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:34:52,835 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:53,331 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2023-12-02 15:34:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:34:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 15:34:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:53,332 INFO L225 Difference]: With dead ends: 85 [2023-12-02 15:34:53,332 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 15:34:53,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:34:53,333 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:53,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 371 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:34:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 15:34:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-02 15:34:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.528301886792453) internal successors, (81), 75 states have internal predecessors, (81), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2023-12-02 15:34:53,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 18 [2023-12-02 15:34:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:53,338 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2023-12-02 15:34:53,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2023-12-02 15:34:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 15:34:53,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:53,339 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:53,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:53,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:53,539 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:53,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1250339911, now seen corresponding path program 1 times [2023-12-02 15:34:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:53,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52402345] [2023-12-02 15:34:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:53,540 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 [2023-12-02 15:34:53,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:53,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:53,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 15:34:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:53,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:53,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:53,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:53,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:53,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52402345] [2023-12-02 15:34:53,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52402345] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:53,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467209964] [2023-12-02 15:34:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:53,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:53,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:53,876 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:53,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 15:34:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:54,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:54,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:54,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1467209964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53075103] [2023-12-02 15:34:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:54,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:54,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:54,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:54,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 15:34:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:54,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:34:54,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:54,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:34:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:34:54,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53075103] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:54,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:34:54,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8] total 21 [2023-12-02 15:34:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604480651] [2023-12-02 15:34:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:54,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:34:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:34:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:34:54,378 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-12-02 15:34:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:54,820 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-12-02 15:34:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:34:54,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 21 [2023-12-02 15:34:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:54,821 INFO L225 Difference]: With dead ends: 83 [2023-12-02 15:34:54,821 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 15:34:54,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:34:54,823 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 24 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:54,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 300 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:34:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 15:34:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 15:34:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.490566037735849) internal successors, (79), 73 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-12-02 15:34:54,827 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 21 [2023-12-02 15:34:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:54,827 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-12-02 15:34:54,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-12-02 15:34:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-12-02 15:34:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 15:34:54,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:54,828 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:54,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:55,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-02 15:34:55,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 15:34:55,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:55,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:55,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1250339912, now seen corresponding path program 1 times [2023-12-02 15:34:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:55,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510510357] [2023-12-02 15:34:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:55,430 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 [2023-12-02 15:34:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:55,431 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:55,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:55,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:55,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:55,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:55,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:55,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510510357] [2023-12-02 15:34:55,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510510357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:55,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12750154] [2023-12-02 15:34:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:55,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:55,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:55,816 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:55,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 15:34:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:56,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:56,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:56,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:56,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12750154] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:56,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104333572] [2023-12-02 15:34:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:56,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:56,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:56,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:56,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 15:34:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:56,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:34:56,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:56,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:34:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:34:56,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104333572] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:56,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:34:56,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 8, 8] total 22 [2023-12-02 15:34:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402773988] [2023-12-02 15:34:56,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:56,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:34:56,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:34:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:34:56,478 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-12-02 15:34:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:57,020 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2023-12-02 15:34:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:34:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 21 [2023-12-02 15:34:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:57,021 INFO L225 Difference]: With dead ends: 81 [2023-12-02 15:34:57,021 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 15:34:57,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:34:57,023 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:57,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 382 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:34:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 15:34:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 15:34:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-12-02 15:34:57,027 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 21 [2023-12-02 15:34:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:57,028 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-12-02 15:34:57,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-12-02 15:34:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-12-02 15:34:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 15:34:57,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:57,029 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:57,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:57,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 15:34:57,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 15:34:57,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:57,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:57,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash 177255861, now seen corresponding path program 1 times [2023-12-02 15:34:57,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:57,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783609679] [2023-12-02 15:34:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:57,631 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 [2023-12-02 15:34:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:57,632 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:57,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 15:34:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:57,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:57,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:57,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:57,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783609679] [2023-12-02 15:34:57,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783609679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894779773] [2023-12-02 15:34:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:57,970 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:57,971 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:57,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-02 15:34:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:58,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:34:58,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:34:58,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894779773] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:58,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:34:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 18 [2023-12-02 15:34:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145267694] [2023-12-02 15:34:58,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:58,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:34:58,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:34:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:34:58,168 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:58,337 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2023-12-02 15:34:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 15:34:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:58,338 INFO L225 Difference]: With dead ends: 81 [2023-12-02 15:34:58,338 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 15:34:58,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:34:58,340 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:58,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 267 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 15:34:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 15:34:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 71 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:34:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-12-02 15:34:58,345 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 20 [2023-12-02 15:34:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:58,345 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-12-02 15:34:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:34:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-12-02 15:34:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 15:34:58,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:58,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:58,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2023-12-02 15:34:58,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-12-02 15:34:58,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:58,747 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:58,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash 889803271, now seen corresponding path program 1 times [2023-12-02 15:34:58,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:58,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52632613] [2023-12-02 15:34:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:58,748 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 [2023-12-02 15:34:58,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:58,749 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:58,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 15:34:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:58,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:34:58,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:34:58,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:58,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:58,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52632613] [2023-12-02 15:34:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52632613] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:58,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:34:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062162038] [2023-12-02 15:34:58,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:58,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:58,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:58,853 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 15:34:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:59,020 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-12-02 15:34:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-12-02 15:34:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:59,022 INFO L225 Difference]: With dead ends: 86 [2023-12-02 15:34:59,022 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 15:34:59,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:59,022 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:59,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 115 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 15:34:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2023-12-02 15:34:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.5) internal successors, (66), 61 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:34:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-12-02 15:34:59,025 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 23 [2023-12-02 15:34:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:59,026 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-12-02 15:34:59,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 15:34:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-12-02 15:34:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:34:59,026 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:59,026 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:59,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 15:34:59,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:59,227 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:34:59,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash -57750687, now seen corresponding path program 1 times [2023-12-02 15:34:59,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:59,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395748404] [2023-12-02 15:34:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:59,228 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 [2023-12-02 15:34:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:59,229 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:34:59,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 15:34:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:59,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:59,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:59,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:59,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395748404] [2023-12-02 15:34:59,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395748404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:59,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2023312388] [2023-12-02 15:34:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:59,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:59,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:59,572 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:59,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 15:34:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:59,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:34:59,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:34:59,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:59,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2023312388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:59,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:34:59,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-12-02 15:34:59,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635437723] [2023-12-02 15:34:59,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:59,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:34:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:59,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:34:59,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:34:59,813 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:35:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:00,031 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2023-12-02 15:35:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:35:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 15:35:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:00,033 INFO L225 Difference]: With dead ends: 68 [2023-12-02 15:35:00,033 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 15:35:00,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:35:00,034 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 12 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:00,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 298 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:35:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 15:35:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 15:35:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 60 states have internal predecessors, (65), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:35:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-12-02 15:35:00,037 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 22 [2023-12-02 15:35:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:00,037 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-12-02 15:35:00,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:35:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-12-02 15:35:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:35:00,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:00,038 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:00,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 15:35:00,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2023-12-02 15:35:00,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:00,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:00,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:00,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2037403193, now seen corresponding path program 1 times [2023-12-02 15:35:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:00,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084242544] [2023-12-02 15:35:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:00,440 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 [2023-12-02 15:35:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:00,441 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:00,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-12-02 15:35:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:00,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:00,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:00,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:00,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084242544] [2023-12-02 15:35:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084242544] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1136882457] [2023-12-02 15:35:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:00,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:00,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:00,769 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:00,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 15:35:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:00,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:00,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:01,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:01,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1136882457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:01,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822746077] [2023-12-02 15:35:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:01,033 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:01,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 15:35:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:01,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:35:01,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:01,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:35:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:01,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:01,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822746077] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:01,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:35:01,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8] total 21 [2023-12-02 15:35:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599715175] [2023-12-02 15:35:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:01,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:35:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:35:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:35:01,378 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:01,876 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-12-02 15:35:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:35:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 15:35:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:01,878 INFO L225 Difference]: With dead ends: 78 [2023-12-02 15:35:01,878 INFO L226 Difference]: Without dead ends: 78 [2023-12-02 15:35:01,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:01,879 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:01,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:35:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-02 15:35:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-12-02 15:35:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 58 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:35:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-12-02 15:35:01,883 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 28 [2023-12-02 15:35:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:01,884 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-12-02 15:35:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-12-02 15:35:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:35:01,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:01,885 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:01,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-12-02 15:35:02,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2023-12-02 15:35:02,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 15:35:02,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:02,489 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:02,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2037403194, now seen corresponding path program 1 times [2023-12-02 15:35:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70243103] [2023-12-02 15:35:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:02,490 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 [2023-12-02 15:35:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:02,491 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:02,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-12-02 15:35:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:02,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:02,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:02,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:02,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:02,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70243103] [2023-12-02 15:35:02,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70243103] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:02,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988421959] [2023-12-02 15:35:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:02,838 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:02,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:02,839 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:02,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 15:35:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:03,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:03,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:03,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988421959] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159228561] [2023-12-02 15:35:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:03,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:03,098 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:03,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 15:35:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:03,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 15:35:03,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:03,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:35:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:03,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:03,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159228561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:03,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:35:03,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 8, 8] total 22 [2023-12-02 15:35:03,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585689219] [2023-12-02 15:35:03,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:03,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:35:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:03,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:35:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:35:03,571 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:04,077 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-12-02 15:35:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:35:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 15:35:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:04,078 INFO L225 Difference]: With dead ends: 64 [2023-12-02 15:35:04,078 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 15:35:04,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:35:04,079 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:04,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 265 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:35:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 15:35:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-02 15:35:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 56 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:35:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-12-02 15:35:04,082 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 28 [2023-12-02 15:35:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:04,082 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-12-02 15:35:04,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-12-02 15:35:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 15:35:04,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:04,082 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1] [2023-12-02 15:35:04,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 15:35:04,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-12-02 15:35:04,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 15:35:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:04,684 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:04,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1385872201, now seen corresponding path program 1 times [2023-12-02 15:35:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:04,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224538538] [2023-12-02 15:35:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:04,684 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 [2023-12-02 15:35:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:04,685 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:04,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 15:35:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:04,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:04,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:04,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:05,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224538538] [2023-12-02 15:35:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224538538] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1069232741] [2023-12-02 15:35:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:05,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:05,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:05,081 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:05,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 15:35:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:05,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:05,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:05,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1069232741] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:05,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:35:05,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-12-02 15:35:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128896120] [2023-12-02 15:35:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:05,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:35:05,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:35:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:35:05,369 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2023-12-02 15:35:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:05,551 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2023-12-02 15:35:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:35:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 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 32 [2023-12-02 15:35:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:05,552 INFO L225 Difference]: With dead ends: 64 [2023-12-02 15:35:05,552 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 15:35:05,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:35:05,553 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:05,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 268 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:35:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 15:35:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-02 15:35:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 56 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:35:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-12-02 15:35:05,555 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 32 [2023-12-02 15:35:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:05,556 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-12-02 15:35:05,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2023-12-02 15:35:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-12-02 15:35:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:35:05,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:05,556 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2023-12-02 15:35:05,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-12-02 15:35:05,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 15:35:05,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:05,957 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_kobject_putErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:05,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -295516537, now seen corresponding path program 1 times [2023-12-02 15:35:05,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:05,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18005937] [2023-12-02 15:35:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:05,958 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 [2023-12-02 15:35:05,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:05,959 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:05,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 15:35:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:06,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:06,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:06,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:06,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18005937] [2023-12-02 15:35:06,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18005937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436816660] [2023-12-02 15:35:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:06,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:06,332 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:06,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 15:35:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:06,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:06,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:06,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:06,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436816660] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:06,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911025448] [2023-12-02 15:35:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:06,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:06,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:06,637 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:06,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 15:35:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:06,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:35:06,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:06,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:35:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:07,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:07,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911025448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:07,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:35:07,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8, 8, 8] total 23 [2023-12-02 15:35:07,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347995902] [2023-12-02 15:35:07,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:07,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:35:07,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:35:07,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-12-02 15:35:07,058 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:07,615 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2023-12-02 15:35:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:35:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 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 34 [2023-12-02 15:35:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:07,616 INFO L225 Difference]: With dead ends: 90 [2023-12-02 15:35:07,616 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 15:35:07,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-12-02 15:35:07,617 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 83 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:07,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 190 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:35:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 15:35:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2023-12-02 15:35:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 65 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2023-12-02 15:35:07,620 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 34 [2023-12-02 15:35:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:07,620 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2023-12-02 15:35:07,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2023-12-02 15:35:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:35:07,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:07,621 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2023-12-02 15:35:07,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 15:35:07,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:08,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-12-02 15:35:08,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:08,222 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_kobject_putErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:08,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash -295516536, now seen corresponding path program 1 times [2023-12-02 15:35:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:08,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469496736] [2023-12-02 15:35:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:08,223 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 [2023-12-02 15:35:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:08,224 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:08,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 15:35:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:08,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:08,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:08,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:08,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:08,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469496736] [2023-12-02 15:35:08,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469496736] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:08,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064536656] [2023-12-02 15:35:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:08,626 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:08,627 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:08,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 15:35:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:08,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:08,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:08,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064536656] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027338130] [2023-12-02 15:35:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:08,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:08,954 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:08,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 15:35:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:09,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 15:35:09,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:09,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:35:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:09,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:09,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027338130] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:09,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:35:09,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 8, 8, 8] total 24 [2023-12-02 15:35:09,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652011994] [2023-12-02 15:35:09,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:09,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:35:09,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:35:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:09,533 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:10,109 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2023-12-02 15:35:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:35:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (3), 3 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 34 [2023-12-02 15:35:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:10,110 INFO L225 Difference]: With dead ends: 73 [2023-12-02 15:35:10,110 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 15:35:10,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:35:10,111 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:10,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 254 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:35:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 15:35:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-12-02 15:35:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 63 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2023-12-02 15:35:10,116 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 34 [2023-12-02 15:35:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:10,116 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2023-12-02 15:35:10,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2023-12-02 15:35:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 15:35:10,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:10,118 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:10,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2023-12-02 15:35:10,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 15:35:10,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 15:35:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:10,719 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_kobject_putErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:10,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 952138710, now seen corresponding path program 1 times [2023-12-02 15:35:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641460522] [2023-12-02 15:35:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:10,720 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 [2023-12-02 15:35:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:10,721 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:10,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 15:35:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:10,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:10,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:11,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:11,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641460522] [2023-12-02 15:35:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641460522] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238424730] [2023-12-02 15:35:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:11,204 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:11,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2023-12-02 15:35:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:11,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:11,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:11,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:11,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238424730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:11,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298314661] [2023-12-02 15:35:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:11,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:11,580 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:11,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 15:35:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:11,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:35:11,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:11,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:35:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:12,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:12,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298314661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:12,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:35:12,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 8, 8, 8] total 24 [2023-12-02 15:35:12,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031391233] [2023-12-02 15:35:12,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:12,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:35:12,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:35:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:12,016 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:12,680 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2023-12-02 15:35:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:35:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 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 37 [2023-12-02 15:35:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:12,682 INFO L225 Difference]: With dead ends: 83 [2023-12-02 15:35:12,682 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 15:35:12,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:35:12,683 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:12,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 183 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:35:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 15:35:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2023-12-02 15:35:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 63 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2023-12-02 15:35:12,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 37 [2023-12-02 15:35:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:12,686 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2023-12-02 15:35:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2023-12-02 15:35:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 15:35:12,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:12,687 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:12,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 15:35:12,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-12-02 15:35:13,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2023-12-02 15:35:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:13,288 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_kobject_putErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:13,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 952138711, now seen corresponding path program 1 times [2023-12-02 15:35:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942843231] [2023-12-02 15:35:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:13,289 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 [2023-12-02 15:35:13,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:13,290 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:13,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 15:35:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:13,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:13,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:13,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:13,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942843231] [2023-12-02 15:35:13,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942843231] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:13,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2141539099] [2023-12-02 15:35:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:13,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:13,743 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:13,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 15:35:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:14,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:14,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:14,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:14,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2141539099] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:14,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834501271] [2023-12-02 15:35:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:14,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:14,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:14,164 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:14,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 15:35:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:14,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 15:35:14,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:14,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:35:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:14,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:14,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834501271] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:14,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 15:35:14,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8, 8, 8] total 25 [2023-12-02 15:35:14,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884286775] [2023-12-02 15:35:14,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:14,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:35:14,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:35:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-12-02 15:35:14,804 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:15,498 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-12-02 15:35:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:35:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 3 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 37 [2023-12-02 15:35:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:15,499 INFO L225 Difference]: With dead ends: 71 [2023-12-02 15:35:15,499 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 15:35:15,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2023-12-02 15:35:15,501 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 91 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:15,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 200 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:35:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 15:35:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-02 15:35:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 61 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-12-02 15:35:15,504 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 37 [2023-12-02 15:35:15,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:15,504 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-12-02 15:35:15,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-12-02 15:35:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 15:35:15,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:15,505 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:15,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 15:35:15,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:15,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 15:35:16,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:16,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_kobject_putErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:16,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash 177326482, now seen corresponding path program 1 times [2023-12-02 15:35:16,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:16,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30246730] [2023-12-02 15:35:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:16,107 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 [2023-12-02 15:35:16,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:16,108 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:16,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 15:35:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:16,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:16,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:16,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:16,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30246730] [2023-12-02 15:35:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30246730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [482058763] [2023-12-02 15:35:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:16,550 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:16,551 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:16,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2023-12-02 15:35:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:16,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:35:16,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:17,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [482058763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:17,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:35:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 8] total 24 [2023-12-02 15:35:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362540468] [2023-12-02 15:35:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:17,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:35:17,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:35:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:17,129 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:17,812 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2023-12-02 15:35:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:35:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (3), 3 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 39 [2023-12-02 15:35:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:17,813 INFO L225 Difference]: With dead ends: 70 [2023-12-02 15:35:17,813 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 15:35:17,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:35:17,814 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 87 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:17,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 187 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:35:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 15:35:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-02 15:35:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 60 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-12-02 15:35:17,818 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 39 [2023-12-02 15:35:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:17,818 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-12-02 15:35:17,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-12-02 15:35:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 15:35:17,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:17,819 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:17,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:18,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2023-12-02 15:35:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:18,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:18,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -26745371, now seen corresponding path program 1 times [2023-12-02 15:35:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109947887] [2023-12-02 15:35:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:18,221 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 [2023-12-02 15:35:18,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:18,221 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2023-12-02 15:35:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:18,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:18,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:35:18,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:35:18,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109947887] [2023-12-02 15:35:18,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109947887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [493316749] [2023-12-02 15:35:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:18,604 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:18,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2023-12-02 15:35:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:18,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:18,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:35:19,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [493316749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:19,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:35:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 21 [2023-12-02 15:35:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158029562] [2023-12-02 15:35:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:19,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:35:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:35:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:35:19,005 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:35:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:19,305 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-12-02 15:35:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:35:19,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2023-12-02 15:35:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:19,307 INFO L225 Difference]: With dead ends: 74 [2023-12-02 15:35:19,307 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 15:35:19,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:19,307 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:19,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 259 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:35:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 15:35:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-02 15:35:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-12-02 15:35:19,311 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 42 [2023-12-02 15:35:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:19,311 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-12-02 15:35:19,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:35:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-12-02 15:35:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 15:35:19,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:19,312 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:19,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2023-12-02 15:35:19,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:19,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:19,713 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:19,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash -76405728, now seen corresponding path program 1 times [2023-12-02 15:35:19,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:19,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211896454] [2023-12-02 15:35:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:19,714 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 [2023-12-02 15:35:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:19,715 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2023-12-02 15:35:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:19,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:19,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:19,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:20,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211896454] [2023-12-02 15:35:20,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211896454] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1015476699] [2023-12-02 15:35:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:20,165 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:20,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2023-12-02 15:35:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:20,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:20,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:20,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:20,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1015476699] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:20,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506702238] [2023-12-02 15:35:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:20,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:20,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:20,627 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:20,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 15:35:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:20,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:20,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:20,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:35:21,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506702238] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:21,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:35:21,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2023-12-02 15:35:21,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60523874] [2023-12-02 15:35:21,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:21,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:35:21,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:35:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:35:21,190 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:35:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:21,801 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2023-12-02 15:35:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:35:21,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-12-02 15:35:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:21,803 INFO L225 Difference]: With dead ends: 76 [2023-12-02 15:35:21,803 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 15:35:21,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:21,803 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 14 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:21,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 450 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:35:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 15:35:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 15:35:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.15) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 15:35:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2023-12-02 15:35:21,807 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 42 [2023-12-02 15:35:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:21,808 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2023-12-02 15:35:21,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:35:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2023-12-02 15:35:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 15:35:21,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:21,809 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:21,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2023-12-02 15:35:22,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:22,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:22,410 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:22,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1406905408, now seen corresponding path program 2 times [2023-12-02 15:35:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438539948] [2023-12-02 15:35:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:22,411 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 [2023-12-02 15:35:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:22,412 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2023-12-02 15:35:22,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:35:22,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:22,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 15:35:22,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:22,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 8 [2023-12-02 15:35:23,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 12 [2023-12-02 15:35:23,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:23,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 37 [2023-12-02 15:35:23,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:23,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 38 [2023-12-02 15:35:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 15:35:23,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:23,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438539948] [2023-12-02 15:35:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438539948] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:23,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:35:23,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-02 15:35:23,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960458536] [2023-12-02 15:35:23,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 15:35:23,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 15:35:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:35:23,823 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:25,629 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2023-12-02 15:35:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 15:35:25,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 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 48 [2023-12-02 15:35:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:25,630 INFO L225 Difference]: With dead ends: 69 [2023-12-02 15:35:25,630 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 15:35:25,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 15:35:25,631 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:25,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 401 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:35:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 15:35:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 15:35:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:35:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2023-12-02 15:35:25,634 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 48 [2023-12-02 15:35:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:25,634 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2023-12-02 15:35:25,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:35:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2023-12-02 15:35:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 15:35:25,635 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:25,635 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:25,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:25,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:25,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:25,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1488811899, now seen corresponding path program 1 times [2023-12-02 15:35:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:25,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36487300] [2023-12-02 15:35:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:25,837 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 [2023-12-02 15:35:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:25,838 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:25,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2023-12-02 15:35:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:26,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:35:26,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:35:26,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:35:26,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36487300] [2023-12-02 15:35:26,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36487300] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011163198] [2023-12-02 15:35:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:26,825 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:26,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:26,825 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:26,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2023-12-02 15:35:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:27,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:35:27,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:35:27,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:35:27,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011163198] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:27,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240940027] [2023-12-02 15:35:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:27,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:27,410 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:27,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 15:35:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:27,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 15:35:27,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:35:27,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:35:28,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240940027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:28,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:35:28,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 37 [2023-12-02 15:35:28,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725415925] [2023-12-02 15:35:28,918 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:28,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 15:35:28,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:28,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 15:35:28,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 15:35:28,921 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:35:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:30,994 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-12-02 15:35:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 15:35:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2023-12-02 15:35:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:30,996 INFO L225 Difference]: With dead ends: 81 [2023-12-02 15:35:30,996 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 15:35:30,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 15:35:30,997 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:30,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 740 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:35:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 15:35:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 15:35:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 15:35:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-12-02 15:35:31,000 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 56 [2023-12-02 15:35:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:31,000 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-12-02 15:35:31,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 15:35:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-12-02 15:35:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 15:35:31,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:31,001 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:31,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2023-12-02 15:35:31,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:31,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:31,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:31,602 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:35:31,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1441210331, now seen corresponding path program 2 times [2023-12-02 15:35:31,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:31,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098894165] [2023-12-02 15:35:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:31,603 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 [2023-12-02 15:35:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:31,604 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:35:31,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2023-12-02 15:35:32,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:32,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-02 15:35:32,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:35:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:35:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:35:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:35:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:35:32,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 33 [2023-12-02 15:35:32,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:32,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 45 [2023-12-02 15:35:32,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:32,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 81 [2023-12-02 15:35:33,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:33,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 129 [2023-12-02 15:35:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-02 15:35:35,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:51,281 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= v_DerPreprocessor_3 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|))) (store (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|))) (store (select |c_#memory_int| |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|) .cse0 (select v_DerPreprocessor_3 .cse0))) .cse1 (select v_DerPreprocessor_3 .cse1))))) (= (let ((.cse2 (bvadd (_ bv4294967295 32) (let ((.cse3 (bvadd (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base| v_DerPreprocessor_3) |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base|))) (concat (concat (concat (select .cse4 (bvadd |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset| (_ bv15 32))) (select .cse4 (bvadd (_ bv14 32) |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset|))) (select .cse4 (bvadd |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset| (_ bv13 32)))) (select .cse4 (bvadd |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset| (_ bv12 32))))) (_ bv1 32)))) (concat (concat (concat ((_ extract 31 24) .cse3) ((_ extract 23 16) .cse3)) ((_ extract 15 8) .cse3)) ((_ extract 7 0) .cse3)))))) (concat (concat (concat ((_ extract 31 24) .cse2) ((_ extract 23 16) .cse2)) ((_ extract 15 8) .cse2)) ((_ extract 7 0) .cse2))) (_ bv1 32)))) is different from false [2023-12-02 15:35:51,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098894165] [2023-12-02 15:35:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098894165] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:35:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [660340548] [2023-12-02 15:35:51,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:51,289 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:51,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2023-12-02 15:35:53,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:53,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 122 conjunts are in the unsatisfiable core [2023-12-02 15:35:53,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:55,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:35:55,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:35:55,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:35:55,264 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:35:55,264 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:35:55,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 33 [2023-12-02 15:35:55,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:55,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 45 [2023-12-02 15:35:55,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:55,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 81 [2023-12-02 15:35:55,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:35:55,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 129 [2023-12-02 15:35:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 15:35:55,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:56,866 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|))) (store (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|))) (store (select |c_#memory_int| |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|) .cse0 (select v_DerPreprocessor_6 .cse0))) .cse1 (select v_DerPreprocessor_6 .cse1))) v_DerPreprocessor_6)) (= (_ bv1 32) (let ((.cse2 (bvadd (_ bv4294967295 32) (let ((.cse3 (bvadd (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base| v_DerPreprocessor_6) |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base|))) (concat (concat (concat (select .cse4 (bvadd |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset| (_ bv15 32))) (select .cse4 (bvadd (_ bv14 32) |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset|))) (select .cse4 (bvadd |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset| (_ bv13 32)))) (select .cse4 (bvadd |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset| (_ bv12 32))))) (_ bv1 32)))) (concat (concat (concat ((_ extract 31 24) .cse3) ((_ extract 23 16) .cse3)) ((_ extract 15 8) .cse3)) ((_ extract 7 0) .cse3)))))) (concat (concat (concat ((_ extract 31 24) .cse2) ((_ extract 23 16) .cse2)) ((_ extract 15 8) .cse2)) ((_ extract 7 0) .cse2)))))) is different from false [2023-12-02 15:35:56,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [660340548] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:35:56,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947892250] [2023-12-02 15:35:56,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:56,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:56,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:56,873 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:56,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-12-02 15:36:00,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:36:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:36:00,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 123 conjunts are in the unsatisfiable core [2023-12-02 15:36:00,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:00,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:36:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:36:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:36:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:36:02,021 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:36:02,022 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:36:02,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 33 [2023-12-02 15:36:02,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 15:36:04,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2023-12-02 15:36:06,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 81 [2023-12-02 15:36:06,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2023-12-02 15:36:19,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 129 [2023-12-02 15:36:19,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 257 [2023-12-02 15:36:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-12-02 15:36:23,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947892250] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:36:59,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:36:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 39, 28] total 65 [2023-12-02 15:36:59,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73103069] [2023-12-02 15:36:59,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:36:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-02 15:36:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:36:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-02 15:36:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=9642, Unknown=20, NotChecked=398, Total=10506 [2023-12-02 15:36:59,480 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 65 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:37:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:37:50,444 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2023-12-02 15:37:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 15:37:50,444 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 62 [2023-12-02 15:37:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:37:50,445 INFO L225 Difference]: With dead ends: 81 [2023-12-02 15:37:50,445 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 15:37:50,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 120.3s TimeCoverageRelationStatistics Valid=880, Invalid=17186, Unknown=32, NotChecked=534, Total=18632 [2023-12-02 15:37:50,452 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:37:50,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 626 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 15:37:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 15:37:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 15:37:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:37:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2023-12-02 15:37:50,455 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 62 [2023-12-02 15:37:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:37:50,456 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2023-12-02 15:37:50,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 15:37:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2023-12-02 15:37:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 15:37:50,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:37:50,457 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:37:50,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-12-02 15:37:50,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2023-12-02 15:37:50,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2023-12-02 15:37:51,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:37:51,058 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_kobject_putErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:37:51,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:37:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1668084553, now seen corresponding path program 1 times [2023-12-02 15:37:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:37:51,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424616105] [2023-12-02 15:37:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:37:51,058 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 [2023-12-02 15:37:51,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:37:51,059 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:37:51,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2023-12-02 15:37:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:37:51,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 152 conjunts are in the unsatisfiable core [2023-12-02 15:37:51,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:37:51,656 INFO L378 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 [2023-12-02 15:37:51,699 INFO L378 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 19 treesize of output 18 [2023-12-02 15:37:51,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-12-02 15:37:51,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-12-02 15:37:51,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-12-02 15:37:52,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-12-02 15:37:52,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-12-02 15:37:52,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 78 [2023-12-02 15:37:52,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2023-12-02 15:37:52,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2023-12-02 15:37:52,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2023-12-02 15:37:53,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2023-12-02 15:37:53,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 128 [2023-12-02 15:37:53,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 138 [2023-12-02 15:37:54,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 148 [2023-12-02 15:37:54,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:37:54,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 117 treesize of output 158 [2023-12-02 15:37:55,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-12-02 15:37:56,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:37:56,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 107 treesize of output 107 [2023-12-02 15:37:56,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:37:56,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:37:57,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:37:57,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:37:58,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:37:58,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:37:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:37:58,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:37:59,259 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3620 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base| v_ArrVal_3620) |c_ldv_kobject_put_ldv_kref_sub_~kref#1.base|) (bvadd |c_ldv_kobject_put_ldv_kref_sub_~kref#1.offset| (_ bv4294967284 32)))) (not (= (let ((.cse2 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv3 32)))) (store (let ((.cse1 (bvadd (_ bv2 32) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|))) (store (let ((.cse0 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv1 32)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base|) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (select v_ArrVal_3620 |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|)) .cse0 (select v_ArrVal_3620 .cse0))) .cse1 (select v_ArrVal_3620 .cse1))) .cse2 (select v_ArrVal_3620 .cse2))) v_ArrVal_3620)))) is different from false [2023-12-02 15:38:06,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:38:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424616105] [2023-12-02 15:38:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424616105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:38:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913765416] [2023-12-02 15:38:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:38:06,541 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:38:06,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:38:06,542 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:38:06,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2023-12-02 15:38:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:38:07,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 149 conjunts are in the unsatisfiable core [2023-12-02 15:38:07,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:38:07,525 INFO L378 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 [2023-12-02 15:38:07,559 INFO L378 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 19 treesize of output 18 [2023-12-02 15:38:07,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-12-02 15:38:07,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-12-02 15:38:07,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-12-02 15:38:07,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-12-02 15:38:07,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-12-02 15:38:08,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 78 [2023-12-02 15:38:08,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2023-12-02 15:38:08,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2023-12-02 15:38:08,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2023-12-02 15:38:08,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2023-12-02 15:38:08,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 128 [2023-12-02 15:38:08,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 138 [2023-12-02 15:38:09,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 148 [2023-12-02 15:38:09,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:09,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 117 treesize of output 158 [2023-12-02 15:38:10,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-12-02 15:38:10,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:10,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 107 treesize of output 107 [2023-12-02 15:38:10,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:10,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:38:11,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:11,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:38:11,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:11,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:38:12,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:12,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 78 treesize of output 114 [2023-12-02 15:38:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:38:13,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:38:13,746 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3838 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (let ((.cse2 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv3 32)))) (store (let ((.cse1 (bvadd (_ bv2 32) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|))) (store (let ((.cse0 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv1 32)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base|) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (select v_ArrVal_3838 |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|)) .cse0 (select v_ArrVal_3838 .cse0))) .cse1 (select v_ArrVal_3838 .cse1))) .cse2 (select v_ArrVal_3838 .cse2))) v_ArrVal_3838)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base| v_ArrVal_3838) |c_ldv_kobject_put_ldv_kref_sub_~kref#1.base|) (_ bv0 32)) (_ bv0 32)))) is different from false [2023-12-02 15:38:15,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913765416] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:38:15,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075772682] [2023-12-02 15:38:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:38:15,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:38:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:38:15,688 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:38:15,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-12-02 15:38:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:38:16,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 184 conjunts are in the unsatisfiable core [2023-12-02 15:38:16,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:38:16,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:38:17,920 INFO L378 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 [2023-12-02 15:38:18,305 INFO L378 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 19 treesize of output 18 [2023-12-02 15:38:18,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-12-02 15:38:19,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-12-02 15:38:19,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-12-02 15:38:20,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-12-02 15:38:20,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-12-02 15:38:21,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 78 [2023-12-02 15:38:22,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2023-12-02 15:38:22,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2023-12-02 15:38:23,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2023-12-02 15:38:24,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2023-12-02 15:38:25,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 128 [2023-12-02 15:38:25,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 138 [2023-12-02 15:38:26,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 148 [2023-12-02 15:38:27,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 158 [2023-12-02 15:38:30,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-12-02 15:38:31,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2023-12-02 15:38:34,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 107 [2023-12-02 15:38:37,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:38:38,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 31 [2023-12-02 15:38:41,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:38:43,656 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:38:43,656 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 10 [2023-12-02 15:38:43,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:38:43,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 91 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 107 treesize of output 101 [2023-12-02 15:38:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:38:44,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:38:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075772682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:38:57,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:38:57,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 48] total 91 [2023-12-02 15:38:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879392012] [2023-12-02 15:38:57,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:38:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-12-02 15:38:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:38:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-12-02 15:38:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=15505, Unknown=3, NotChecked=506, Total=16770 [2023-12-02 15:38:57,731 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 92 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 86 states have internal predecessors, (111), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 15:39:17,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:39:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:39:52,597 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2023-12-02 15:39:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 15:39:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 86 states have internal predecessors, (111), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 63 [2023-12-02 15:39:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:39:52,598 INFO L225 Difference]: With dead ends: 74 [2023-12-02 15:39:52,598 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 15:39:52,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8290 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=1104, Invalid=20363, Unknown=3, NotChecked=582, Total=22052 [2023-12-02 15:39:52,600 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:39:52,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 305 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 37.2s Time] [2023-12-02 15:39:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 15:39:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-02 15:39:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 15:39:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-12-02 15:39:52,602 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 63 [2023-12-02 15:39:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:39:52,603 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-12-02 15:39:52,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 86 states have internal predecessors, (111), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 15:39:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-12-02 15:39:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 15:39:52,603 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:39:52,604 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:39:52,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-12-02 15:39:52,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2023-12-02 15:39:53,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2023-12-02 15:39:53,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:39:53,204 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_kobject_putErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 15:39:53,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:39:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -171013440, now seen corresponding path program 1 times [2023-12-02 15:39:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:39:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394165266] [2023-12-02 15:39:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:39:53,205 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 [2023-12-02 15:39:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:39:53,206 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 15:39:53,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2023-12-02 15:39:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:39:53,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 152 conjunts are in the unsatisfiable core [2023-12-02 15:39:53,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:39:53,917 INFO L378 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 [2023-12-02 15:39:53,991 INFO L378 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 19 treesize of output 18 [2023-12-02 15:39:54,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-12-02 15:39:54,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-12-02 15:39:54,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-12-02 15:39:54,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-12-02 15:39:54,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-12-02 15:39:54,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 78 [2023-12-02 15:39:55,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2023-12-02 15:39:55,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2023-12-02 15:39:55,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2023-12-02 15:39:55,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2023-12-02 15:39:56,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 128 [2023-12-02 15:39:56,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 138 [2023-12-02 15:39:57,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 148 [2023-12-02 15:39:57,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:39:57,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 117 treesize of output 158 [2023-12-02 15:39:59,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-12-02 15:39:59,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:39:59,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 99 treesize of output 121 [2023-12-02 15:40:01,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:40:01,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:40:02,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:40:02,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:40:04,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:40:04,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:40:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:40:05,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:05,750 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4263 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base| v_ArrVal_4263) |c_ldv_kobject_put_ldv_kref_sub_~kref#1.base|) (bvadd |c_ldv_kobject_put_ldv_kref_sub_~kref#1.offset| (_ bv4294967284 32)))) (not (= (let ((.cse2 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv3 32)))) (store (let ((.cse1 (bvadd (_ bv2 32) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|))) (store (let ((.cse0 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv1 32)))) (store (store (select |c_#memory_$Pointer$.base| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base|) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (select v_ArrVal_4263 |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|)) .cse0 (select v_ArrVal_4263 .cse0))) .cse1 (select v_ArrVal_4263 .cse1))) .cse2 (select v_ArrVal_4263 .cse2))) v_ArrVal_4263)))) is different from false [2023-12-02 15:40:08,928 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4257 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (let ((.cse2 (bvadd (_ bv3 32) |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.offset|))) (store (let ((.cse1 (bvadd (_ bv2 32) |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.offset|))) (store (let ((.cse0 (bvadd (_ bv1 32) |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.offset|))) (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.base|) |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.offset| (select v_ArrVal_4257 |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.offset|)) .cse0 (select v_ArrVal_4257 .cse0))) .cse1 (select v_ArrVal_4257 .cse1))) .cse2 (select v_ArrVal_4257 .cse2))) v_ArrVal_4257)) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_atomic_add_return_~v#1.base| v_ArrVal_4257) |c_ULTIMATE.start_entry_point_~kobj~2#1.base|) |c_ULTIMATE.start_entry_point_~kobj~2#1.offset|) (_ bv0 32)))) is different from false [2023-12-02 15:40:09,029 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4257 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_kobject_get_~kobj#1.base| v_ArrVal_4257) |c_ULTIMATE.start_entry_point_~kobj~2#1.base|) |c_ULTIMATE.start_entry_point_~kobj~2#1.offset|) (_ bv0 32)) (not (= (let ((.cse3 (bvadd |c_ULTIMATE.start_ldv_kobject_get_~kobj#1.offset| (_ bv15 32)))) (store (let ((.cse2 (bvadd (_ bv14 32) |c_ULTIMATE.start_ldv_kobject_get_~kobj#1.offset|))) (store (let ((.cse1 (bvadd |c_ULTIMATE.start_ldv_kobject_get_~kobj#1.offset| (_ bv13 32)))) (store (let ((.cse0 (bvadd |c_ULTIMATE.start_ldv_kobject_get_~kobj#1.offset| (_ bv12 32)))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_kobject_get_~kobj#1.base|) .cse0 (select v_ArrVal_4257 .cse0))) .cse1 (select v_ArrVal_4257 .cse1))) .cse2 (select v_ArrVal_4257 .cse2))) .cse3 (select v_ArrVal_4257 .cse3))) v_ArrVal_4257)))) is different from false [2023-12-02 15:41:08,849 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4252 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_kref_init_~kref#1.base| v_ArrVal_4252))) (store .cse0 |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base| (store (store (select .cse0 |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.offset|) |c_ULTIMATE.start_ldv_kobject_init_internal_~kobj#1.base|))) |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.base|) |c_ULTIMATE.start_ldv_kobject_create_~kobj~1#1.offset|) (_ bv0 32)) (not (= v_ArrVal_4252 (let ((.cse3 (bvadd |c_ULTIMATE.start_ldv_kref_init_~kref#1.offset| (_ bv3 32)))) (store (let ((.cse2 (bvadd (_ bv2 32) |c_ULTIMATE.start_ldv_kref_init_~kref#1.offset|))) (store (let ((.cse1 (bvadd |c_ULTIMATE.start_ldv_kref_init_~kref#1.offset| (_ bv1 32)))) (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ldv_kref_init_~kref#1.base|) |c_ULTIMATE.start_ldv_kref_init_~kref#1.offset| (select v_ArrVal_4252 |c_ULTIMATE.start_ldv_kref_init_~kref#1.offset|)) .cse1 (select v_ArrVal_4252 .cse1))) .cse2 (select v_ArrVal_4252 .cse2))) .cse3 (select v_ArrVal_4252 .cse3))))))) is different from false [2023-12-02 15:42:04,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 389 treesize of output 385 [2023-12-02 15:42:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 121 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 15:42:09,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:42:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394165266] [2023-12-02 15:42:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394165266] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:42:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906696945] [2023-12-02 15:42:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:09,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:42:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:42:09,799 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:42:09,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2023-12-02 15:42:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:10,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 149 conjunts are in the unsatisfiable core [2023-12-02 15:42:10,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:42:10,819 INFO L378 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 [2023-12-02 15:42:10,856 INFO L378 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 19 treesize of output 18 [2023-12-02 15:42:10,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-12-02 15:42:10,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-12-02 15:42:11,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-12-02 15:42:11,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-12-02 15:42:11,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-12-02 15:42:11,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 78 [2023-12-02 15:42:11,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2023-12-02 15:42:11,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2023-12-02 15:42:11,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2023-12-02 15:42:11,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2023-12-02 15:42:12,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 128 [2023-12-02 15:42:12,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 138 [2023-12-02 15:42:12,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 148 [2023-12-02 15:42:12,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:12,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 117 treesize of output 158 [2023-12-02 15:42:13,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-12-02 15:42:13,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:13,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 99 treesize of output 121 [2023-12-02 15:42:14,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:14,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:42:14,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:14,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:42:16,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:16,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:42:18,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:18,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 66 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 92 treesize of output 136 [2023-12-02 15:42:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:42:19,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:42:22,074 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4470 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (let ((.cse2 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv3 32)))) (store (let ((.cse1 (bvadd (_ bv2 32) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|))) (store (let ((.cse0 (bvadd |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (_ bv1 32)))) (store (store (select |c_#memory_$Pointer$.base| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base|) |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset| (select v_ArrVal_4470 |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.offset|)) .cse0 (select v_ArrVal_4470 .cse0))) .cse1 (select v_ArrVal_4470 .cse1))) .cse2 (select v_ArrVal_4470 .cse2))) v_ArrVal_4470)) (= (select (select (store |c_#memory_$Pointer$.base| |c_ldv_kobject_put_ldv_atomic_sub_return_~v#1.base| v_ArrVal_4470) |c_ldv_kobject_put_ldv_kref_sub_~kref#1.base|) (_ bv0 32)) (_ bv0 32)))) is different from false [2023-12-02 15:42:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906696945] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:42:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123764982] [2023-12-02 15:42:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:26,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:42:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:42:26,195 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:42:26,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85834e1-7aba-44eb-82f5-602cbde28da8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-12-02 15:42:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:26,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 184 conjunts are in the unsatisfiable core [2023-12-02 15:42:26,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:42:27,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 15:42:30,454 INFO L378 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 [2023-12-02 15:42:30,961 INFO L378 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 19 treesize of output 18 [2023-12-02 15:42:31,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-12-02 15:42:32,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-12-02 15:42:32,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-12-02 15:42:33,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-12-02 15:42:34,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2023-12-02 15:42:35,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 78 [2023-12-02 15:42:36,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2023-12-02 15:42:36,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2023-12-02 15:42:37,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2023-12-02 15:42:38,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2023-12-02 15:42:39,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 128 [2023-12-02 15:42:41,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 138 [2023-12-02 15:42:42,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 148 [2023-12-02 15:42:44,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 158 [2023-12-02 15:42:49,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2023-12-02 15:42:50,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2023-12-02 15:42:56,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 121 [2023-12-02 15:43:01,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:43:03,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2023-12-02 15:43:12,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:43:17,080 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:43:17,081 INFO L378 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 10 [2023-12-02 15:43:17,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:43:17,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 120 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 121 [2023-12-02 15:43:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:43:18,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:46:52,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 389 treesize of output 385 [2023-12-02 15:46:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 1 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:46:59,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123764982] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:46:59,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2023-12-02 15:46:59,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 42, 47, 50, 47] total 174 [2023-12-02 15:46:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999971313] [2023-12-02 15:46:59,302 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2023-12-02 15:46:59,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2023-12-02 15:46:59,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:46:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2023-12-02 15:46:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2597, Invalid=27851, Unknown=22, NotChecked=1750, Total=32220 [2023-12-02 15:46:59,306 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 174 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 164 states have internal predecessors, (208), 9 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 15:48:06,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 15:48:09,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 15:48:12,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 15:49:34,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]