./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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_048da828-be6c-4825-ab96-eb980f190ed0/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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:52:04,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:52:04,925 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 12:52:04,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:52:04,932 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:52:04,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:52:04,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:52:04,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:52:04,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:52:04,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:52:04,958 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:52:04,959 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:52:04,959 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:52:04,960 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:52:04,961 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:52:04,961 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:52:04,962 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:52:04,962 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:52:04,963 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:52:04,963 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:52:04,964 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:52:04,964 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:52:04,965 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:52:04,966 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:52:04,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:52:04,966 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:52:04,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:52:04,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:52:04,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:52:04,968 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:52:04,968 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:52:04,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:52:04,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:52:04,970 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:52:04,970 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:52:04,970 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:52:04,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:52:04,973 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:52:04,973 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:52:04,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:52:04,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:52:04,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:52:04,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:52:04,976 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:52:04,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:52:04,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:52:04,978 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:52:04,978 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:52:04,978 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_048da828-be6c-4825-ab96-eb980f190ed0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2023-12-02 12:52:05,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:52:05,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:52:05,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:52:05,235 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:52:05,236 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:52:05,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2023-12-02 12:52:08,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:52:08,277 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:52:08,277 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2023-12-02 12:52:08,295 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data/73e42ff8c/08c7897709474da59a1660c20afdee4d/FLAG83d669aa4 [2023-12-02 12:52:08,308 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data/73e42ff8c/08c7897709474da59a1660c20afdee4d [2023-12-02 12:52:08,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:52:08,312 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:52:08,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:52:08,313 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:52:08,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:52:08,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:52:08" (1/1) ... [2023-12-02 12:52:08,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be4aa18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:08, skipping insertion in model container [2023-12-02 12:52:08,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:52:08" (1/1) ... [2023-12-02 12:52:08,375 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:52:08,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:52:08,728 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 12:52:08,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26ab72da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:08, skipping insertion in model container [2023-12-02 12:52:08,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:52:08,729 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 12:52:08,731 INFO L158 Benchmark]: Toolchain (without parser) took 418.62ms. Allocated memory is still 136.3MB. Free memory was 104.9MB in the beginning and 90.9MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 12:52:08,732 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:52:08,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 416.47ms. Allocated memory is still 136.3MB. Free memory was 104.9MB in the beginning and 90.9MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 12:52:08,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 416.47ms. Allocated memory is still 136.3MB. Free memory was 104.9MB in the beginning and 90.9MB in the end (delta: 14.1MB). 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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_048da828-be6c-4825-ab96-eb980f190ed0/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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:52:10,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:52:10,624 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 12:52:10,630 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:52:10,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:52:10,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:52:10,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:52:10,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:52:10,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:52:10,664 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:52:10,664 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:52:10,665 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:52:10,665 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:52:10,666 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:52:10,667 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:52:10,667 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:52:10,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:52:10,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:52:10,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:52:10,670 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:52:10,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:52:10,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:52:10,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:52:10,672 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:52:10,673 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:52:10,673 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:52:10,674 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:52:10,674 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:52:10,675 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 12:52:10,675 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 12:52:10,676 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:52:10,676 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:52:10,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:52:10,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:52:10,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 12:52:10,677 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:52:10,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:52:10,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:52:10,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:52:10,678 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:52:10,679 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 12:52:10,679 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:10,679 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:52:10,679 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:52:10,680 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:52:10,680 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_048da828-be6c-4825-ab96-eb980f190ed0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2023-12-02 12:52:10,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:52:11,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:52:11,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:52:11,019 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:52:11,019 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:52:11,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2023-12-02 12:52:13,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:52:14,100 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:52:14,101 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2023-12-02 12:52:14,116 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data/f23b105c2/98a6017161e14dd696727903d3c0e3be/FLAGb721ac595 [2023-12-02 12:52:14,129 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/data/f23b105c2/98a6017161e14dd696727903d3c0e3be [2023-12-02 12:52:14,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:52:14,133 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:52:14,134 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:52:14,134 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:52:14,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:52:14,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4265e0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14, skipping insertion in model container [2023-12-02 12:52:14,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:52:14,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:52:14,542 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 12:52:14,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:52:14,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:52:14,608 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:52:14,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:52:14,693 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:52:14,699 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:52:14,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14 WrapperNode [2023-12-02 12:52:14,699 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:52:14,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:52:14,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:52:14,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:52:14,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,748 INFO L138 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 52 [2023-12-02 12:52:14,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:52:14,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:52:14,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:52:14,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:52:14,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:52:14,779 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:52:14,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:52:14,780 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:52:14,781 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (1/1) ... [2023-12-02 12:52:14,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:52:14,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:14,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:52:14,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:52:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 12:52:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 12:52:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:52:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:52:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:52:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:52:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:52:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 12:52:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:52:14,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:52:14,993 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:52:14,996 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:52:15,206 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:52:15,234 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:52:15,234 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 12:52:15,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:52:15 BoogieIcfgContainer [2023-12-02 12:52:15,235 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:52:15,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:52:15,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:52:15,241 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:52:15,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:52:14" (1/3) ... [2023-12-02 12:52:15,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406019bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:52:15, skipping insertion in model container [2023-12-02 12:52:15,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:14" (2/3) ... [2023-12-02 12:52:15,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406019bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:52:15, skipping insertion in model container [2023-12-02 12:52:15,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:52:15" (3/3) ... [2023-12-02 12:52:15,243 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18.i [2023-12-02 12:52:15,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:52:15,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-12-02 12:52:15,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:52:15,311 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;@4f741b7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:52:15,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-12-02 12:52:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:52:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:52:15,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:15,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:15,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 122947809, now seen corresponding path program 1 times [2023-12-02 12:52:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:15,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084479020] [2023-12-02 12:52:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:15,340 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 12:52:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:15,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:15,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:15,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:15,501 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 12:52:15,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:52:15,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084479020] [2023-12-02 12:52:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084479020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:52:15,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:52:15,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:52:15,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001963858] [2023-12-02 12:52:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:52:15,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:52:15,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:52:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:52:15,536 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 12:52:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:15,676 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-12-02 12:52:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:52:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 12:52:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:15,688 INFO L225 Difference]: With dead ends: 64 [2023-12-02 12:52:15,688 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 12:52:15,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 12:52:15,693 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:15,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 101 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:52:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 12:52:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2023-12-02 12:52:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.625) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:52:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-12-02 12:52:15,728 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 10 [2023-12-02 12:52:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:15,728 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-12-02 12:52:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 12:52:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-12-02 12:52:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:52:15,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:15,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:15,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:15,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:15,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1010451490, now seen corresponding path program 1 times [2023-12-02 12:52:15,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:15,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091949266] [2023-12-02 12:52:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:15,939 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 12:52:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:15,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:15,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:15,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:15,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:16,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:52:16,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091949266] [2023-12-02 12:52:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091949266] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:52:16,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:52:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:52:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575303497] [2023-12-02 12:52:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:52:16,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:52:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:52:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:52:16,017 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 12:52:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:16,120 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2023-12-02 12:52:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:52:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 12:52:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:16,123 INFO L225 Difference]: With dead ends: 65 [2023-12-02 12:52:16,123 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 12:52:16,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 12:52:16,125 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 25 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:16,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 129 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:52:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 12:52:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2023-12-02 12:52:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:52:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-02 12:52:16,133 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2023-12-02 12:52:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:16,133 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-02 12:52:16,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 12:52:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-02 12:52:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:52:16,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:16,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:16,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:16,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2137305740, now seen corresponding path program 1 times [2023-12-02 12:52:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:16,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446825063] [2023-12-02 12:52:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:52:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:16,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:16,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:52:16,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:16,436 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 12:52:16,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:52:16,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:16,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446825063] [2023-12-02 12:52:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446825063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:52:16,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:52:16,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:52:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775058836] [2023-12-02 12:52:16,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:52:16,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:52:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:52:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:52:16,439 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12:52:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:16,495 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2023-12-02 12:52:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:52:16,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2023-12-02 12:52:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:16,497 INFO L225 Difference]: With dead ends: 59 [2023-12-02 12:52:16,497 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 12:52:16,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 12:52:16,499 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:16,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 59 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:52:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 12:52:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2023-12-02 12:52:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:52:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-02 12:52:16,506 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 12 [2023-12-02 12:52:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:16,506 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-02 12:52:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 12:52:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-02 12:52:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:52:16,507 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:16,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:16,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:16,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1288895180, now seen corresponding path program 1 times [2023-12-02 12:52:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960031808] [2023-12-02 12:52:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:16,712 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 12:52:16,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:16,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:16,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:52:16,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:16,800 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 12:52:16,950 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:52:16,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 12:52:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:16,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:19,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:19,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960031808] [2023-12-02 12:52:19,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960031808] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:19,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [700045622] [2023-12-02 12:52:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:19,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:19,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:19,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:19,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 12:52:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:19,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:52:19,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:19,400 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 12:52:19,446 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 12:52:19,471 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 12:52:19,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 12:52:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:52:19,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:20,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [700045622] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511553116] [2023-12-02 12:52:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:20,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:20,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:20,729 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:20,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:52:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:20,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:52:20,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:20,809 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 12:52:20,879 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:52:20,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 12:52:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:20,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:24,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511553116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:24,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:52:24,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2023-12-02 12:52:24,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042277674] [2023-12-02 12:52:24,601 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:24,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:52:24,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:52:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-12-02 12:52:24,603 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:52:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:24,840 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-12-02 12:52:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:52:24,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 17 [2023-12-02 12:52:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:24,842 INFO L225 Difference]: With dead ends: 55 [2023-12-02 12:52:24,842 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:52:24,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=22, Invalid=53, Unknown=1, NotChecked=14, Total=90 [2023-12-02 12:52:24,843 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:24,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 97 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2023-12-02 12:52:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:52:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-12-02 12:52:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 12:52:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-12-02 12:52:24,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 17 [2023-12-02 12:52:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:24,852 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-12-02 12:52:24,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:52:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-12-02 12:52:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:52:24,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:24,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:24,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:52:25,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:52:25,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 12:52:25,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:25,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:25,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1288895181, now seen corresponding path program 1 times [2023-12-02 12:52:25,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:25,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986594483] [2023-12-02 12:52:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:25,467 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 12:52:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:25,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:25,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:52:25,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:25,548 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 12:52:25,555 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 12:52:25,791 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 12:52:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:25,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:25,840 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:25,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:52:25,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:28,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:28,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986594483] [2023-12-02 12:52:28,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986594483] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:28,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1447736132] [2023-12-02 12:52:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:28,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:28,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:28,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 12:52:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:28,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:52:28,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:28,379 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 12:52:28,385 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 12:52:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:28,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:28,530 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:28,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:52:28,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1447736132] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438249288] [2023-12-02 12:52:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:29,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:29,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:29,172 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:29,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:52:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:29,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:52:29,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:29,249 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 12:52:29,259 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 12:52:29,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:29,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:29,390 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:29,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:52:29,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438249288] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:30,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:52:30,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2023-12-02 12:52:30,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264059565] [2023-12-02 12:52:30,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:30,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:52:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:52:30,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=106, Unknown=2, NotChecked=20, Total=156 [2023-12-02 12:52:30,059 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 12:52:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:30,710 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2023-12-02 12:52:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:52:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 17 [2023-12-02 12:52:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:30,712 INFO L225 Difference]: With dead ends: 107 [2023-12-02 12:52:30,712 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 12:52:30,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=59, Invalid=249, Unknown=2, NotChecked=32, Total=342 [2023-12-02 12:52:30,713 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 111 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:30,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 172 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2023-12-02 12:52:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 12:52:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2023-12-02 12:52:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 64 states have internal predecessors, (87), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 12:52:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 102 transitions. [2023-12-02 12:52:30,721 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 102 transitions. Word has length 17 [2023-12-02 12:52:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:30,721 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 102 transitions. [2023-12-02 12:52:30,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 12:52:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 102 transitions. [2023-12-02 12:52:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:52:30,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:30,722 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:30,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:52:30,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 12:52:31,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:31,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:31,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 783336555, now seen corresponding path program 1 times [2023-12-02 12:52:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:31,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725804799] [2023-12-02 12:52:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:31,324 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 12:52:31,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:31,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:31,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (11)] Waiting until timeout for monitored process [2023-12-02 12:52:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:31,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:52:31,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:31,401 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:52:31,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725804799] [2023-12-02 12:52:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725804799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:52:31,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:52:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:52:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139711129] [2023-12-02 12:52:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:52:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:52:31,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:52:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:52:31,403 INFO L87 Difference]: Start difference. First operand 72 states and 102 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:52:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:31,478 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2023-12-02 12:52:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:52:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2023-12-02 12:52:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:31,480 INFO L225 Difference]: With dead ends: 65 [2023-12-02 12:52:31,480 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 12:52:31,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 12:52:31,481 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:31,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:52:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 12:52:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-12-02 12:52:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 57 states have internal predecessors, (77), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:52:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2023-12-02 12:52:31,488 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 17 [2023-12-02 12:52:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:31,488 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2023-12-02 12:52:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:52:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2023-12-02 12:52:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:52:31,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:31,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:31,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (11)] Ended with exit code 0 [2023-12-02 12:52:31,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:31,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:31,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1677635320, now seen corresponding path program 1 times [2023-12-02 12:52:31,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909126854] [2023-12-02 12:52:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:31,691 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 12:52:31,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:31,692 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:31,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:31,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:31,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:31,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:52:31,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:31,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909126854] [2023-12-02 12:52:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909126854] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:52:31,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:52:31,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:52:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224893249] [2023-12-02 12:52:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:52:31,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:52:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:52:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:52:31,764 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:52:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:31,827 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2023-12-02 12:52:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:52:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-12-02 12:52:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:31,829 INFO L225 Difference]: With dead ends: 102 [2023-12-02 12:52:31,829 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 12:52:31,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:52:31,830 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:31,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:52:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 12:52:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2023-12-02 12:52:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.588235294117647) internal successors, (81), 59 states have internal predecessors, (81), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:52:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 92 transitions. [2023-12-02 12:52:31,838 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 92 transitions. Word has length 19 [2023-12-02 12:52:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:31,839 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 92 transitions. [2023-12-02 12:52:31,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:52:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 92 transitions. [2023-12-02 12:52:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:52:31,840 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:31,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:31,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:52:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:32,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:32,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash -874521641, now seen corresponding path program 1 times [2023-12-02 12:52:32,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:32,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545548999] [2023-12-02 12:52:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:32,042 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 12:52:32,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:32,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:32,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Waiting until timeout for monitored process [2023-12-02 12:52:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:32,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:52:32,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:32,098 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 12:52:32,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:52:32,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:32,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545548999] [2023-12-02 12:52:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545548999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:52:32,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:52:32,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:52:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006991050] [2023-12-02 12:52:32,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:52:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:52:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:52:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:52:32,100 INFO L87 Difference]: Start difference. First operand 67 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:52:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:32,161 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-12-02 12:52:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:52:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-02 12:52:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:32,163 INFO L225 Difference]: With dead ends: 64 [2023-12-02 12:52:32,163 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 12:52:32,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 12:52:32,164 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:32,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:52:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 12:52:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2023-12-02 12:52:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.5) internal successors, (66), 52 states have internal predecessors, (66), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:52:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-12-02 12:52:32,170 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 19 [2023-12-02 12:52:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:32,170 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-12-02 12:52:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 12:52:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-12-02 12:52:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 12:52:32,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:32,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:32,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:52:32,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:32,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:32,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:32,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1340368552, now seen corresponding path program 1 times [2023-12-02 12:52:32,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:32,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625609538] [2023-12-02 12:52:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:32,373 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 12:52:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:32,374 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:32,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (14)] Waiting until timeout for monitored process [2023-12-02 12:52:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:32,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:52:32,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:32,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:32,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625609538] [2023-12-02 12:52:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625609538] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466734531] [2023-12-02 12:52:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:32,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:32,776 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:32,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-02 12:52:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:32,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:32,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:32,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:32,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466734531] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:32,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372067261] [2023-12-02 12:52:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:32,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:32,953 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:32,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:52:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:33,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:33,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:33,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:33,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372067261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:33,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:52:33,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 12:52:33,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673178860] [2023-12-02 12:52:33,090 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:33,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:52:33,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:52:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:52:33,092 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:52:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:33,257 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-12-02 12:52:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:52:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 20 [2023-12-02 12:52:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:33,259 INFO L225 Difference]: With dead ends: 63 [2023-12-02 12:52:33,259 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:52:33,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:52:33,260 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:33,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 87 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:52:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:52:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 12:52:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.434782608695652) internal successors, (66), 52 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:52:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-12-02 12:52:33,265 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 20 [2023-12-02 12:52:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:33,265 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-12-02 12:52:33,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:52:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-12-02 12:52:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:52:33,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:33,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:33,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 12:52:33,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (14)] Forceful destruction successful, exit code 0 [2023-12-02 12:52:33,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2023-12-02 12:52:33,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:33,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:33,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1690069010, now seen corresponding path program 1 times [2023-12-02 12:52:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:33,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810393819] [2023-12-02 12:52:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:33,872 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 12:52:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:33,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:33,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Waiting until timeout for monitored process [2023-12-02 12:52:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:33,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:33,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:52:33,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:52:34,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:34,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810393819] [2023-12-02 12:52:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810393819] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133936633] [2023-12-02 12:52:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:34,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:34,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:34,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:34,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 12:52:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:34,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:34,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:52:34,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:52:34,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1133936633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846547601] [2023-12-02 12:52:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:34,213 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:34,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 12:52:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:34,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:52:34,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:52:34,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:52:34,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846547601] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:34,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:52:34,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-12-02 12:52:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107846247] [2023-12-02 12:52:34,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:52:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:52:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:52:34,339 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:52:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:34,486 INFO L93 Difference]: Finished difference Result 157 states and 197 transitions. [2023-12-02 12:52:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:52:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-12-02 12:52:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:34,488 INFO L225 Difference]: With dead ends: 157 [2023-12-02 12:52:34,488 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 12:52:34,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 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 12:52:34,490 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 263 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:34,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 144 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:52:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 12:52:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 83. [2023-12-02 12:52:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2023-12-02 12:52:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 112 transitions. [2023-12-02 12:52:34,498 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 112 transitions. Word has length 21 [2023-12-02 12:52:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:34,498 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 112 transitions. [2023-12-02 12:52:34,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:52:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 112 transitions. [2023-12-02 12:52:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 12:52:34,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:34,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:34,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Ended with exit code 0 [2023-12-02 12:52:34,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2023-12-02 12:52:34,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 12:52:35,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:35,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:35,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -608487222, now seen corresponding path program 1 times [2023-12-02 12:52:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:35,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898305867] [2023-12-02 12:52:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:35,104 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 12:52:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:35,105 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (20)] Waiting until timeout for monitored process [2023-12-02 12:52:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:35,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:52:35,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:35,290 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2023-12-02 12:52:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:35,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:35,386 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 12:52:35,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-12-02 12:52:39,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:39,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898305867] [2023-12-02 12:52:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898305867] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:39,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [877449235] [2023-12-02 12:52:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:39,536 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:39,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:39,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:39,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 12:52:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:39,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:52:39,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:39,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:39,904 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 12:52:39,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-12-02 12:52:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [877449235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:42,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520771398] [2023-12-02 12:52:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:42,080 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:42,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 12:52:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:42,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:52:42,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:42,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:42,326 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 12:52:42,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-12-02 12:52:44,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520771398] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:44,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:52:44,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2023-12-02 12:52:44,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870692083] [2023-12-02 12:52:44,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:44,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:52:44,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:52:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=85, Unknown=3, NotChecked=18, Total=132 [2023-12-02 12:52:44,493 INFO L87 Difference]: Start difference. First operand 83 states and 112 transitions. Second operand has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:52:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:44,859 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-12-02 12:52:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:52:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2023-12-02 12:52:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:44,861 INFO L225 Difference]: With dead ends: 116 [2023-12-02 12:52:44,862 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 12:52:44,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=33, Invalid=100, Unknown=3, NotChecked=20, Total=156 [2023-12-02 12:52:44,863 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:44,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2023-12-02 12:52:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 12:52:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2023-12-02 12:52:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 83 states have internal predecessors, (112), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2023-12-02 12:52:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 141 transitions. [2023-12-02 12:52:44,870 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 141 transitions. Word has length 23 [2023-12-02 12:52:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:44,871 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 141 transitions. [2023-12-02 12:52:44,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:52:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 141 transitions. [2023-12-02 12:52:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:52:44,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:44,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:44,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 12:52:45,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (20)] Ended with exit code 0 [2023-12-02 12:52:45,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2023-12-02 12:52:45,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:45,473 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:45,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:45,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1839498759, now seen corresponding path program 1 times [2023-12-02 12:52:45,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:45,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796400431] [2023-12-02 12:52:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:45,474 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 12:52:45,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:45,475 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:45,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (23)] Waiting until timeout for monitored process [2023-12-02 12:52:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:45,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:52:45,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:45,554 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 12:52:45,559 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 12:52:45,698 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 12:52:45,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:45,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:45,727 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:45,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:45,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:45,864 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:45,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2023-12-02 12:52:45,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:46,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796400431] [2023-12-02 12:52:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796400431] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991698074] [2023-12-02 12:52:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:46,262 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:46,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-12-02 12:52:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:46,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:52:46,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:46,415 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 12:52:46,424 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 12:52:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:46,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:46,532 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:46,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:46,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:46,628 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:46,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2023-12-02 12:52:46,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:46,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991698074] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:46,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794900559] [2023-12-02 12:52:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:46,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:46,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:46,894 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:46,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 12:52:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:46,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:52:46,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:46,981 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 12:52:46,987 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 12:52:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:47,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:47,110 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:47,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:47,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:47,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:52:47,214 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:52:47,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:52:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2023-12-02 12:52:47,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:49,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794900559] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:49,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:52:49,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2023-12-02 12:52:49,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859545383] [2023-12-02 12:52:49,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:49,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:52:49,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:52:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:52:49,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-12-02 12:52:49,556 INFO L87 Difference]: Start difference. First operand 100 states and 141 transitions. Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:52:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:50,121 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2023-12-02 12:52:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:52:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-12-02 12:52:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:50,123 INFO L225 Difference]: With dead ends: 144 [2023-12-02 12:52:50,123 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 12:52:50,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=83, Invalid=382, Unknown=1, NotChecked=40, Total=506 [2023-12-02 12:52:50,125 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:50,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 155 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 251 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2023-12-02 12:52:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 12:52:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 106. [2023-12-02 12:52:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.430232558139535) internal successors, (123), 90 states have internal predecessors, (123), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 12:52:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 149 transitions. [2023-12-02 12:52:50,133 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 149 transitions. Word has length 26 [2023-12-02 12:52:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:50,133 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 149 transitions. [2023-12-02 12:52:50,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:52:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 149 transitions. [2023-12-02 12:52:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 12:52:50,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:50,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:50,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2023-12-02 12:52:50,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 12:52:50,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (23)] Forceful destruction successful, exit code 0 [2023-12-02 12:52:50,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:50,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:52:50,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash -783990781, now seen corresponding path program 1 times [2023-12-02 12:52:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:52:50,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112893225] [2023-12-02 12:52:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:50,737 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 12:52:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:52:50,738 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:52:50,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Waiting until timeout for monitored process [2023-12-02 12:52:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:50,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:52:50,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:50,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:51,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 12:52:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:51,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:52:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112893225] [2023-12-02 12:52:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112893225] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824460298] [2023-12-02 12:52:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:51,662 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:52:51,663 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:52:51,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 12:52:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:51,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:52:51,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:51,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:56,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 12:52:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824460298] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:52:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165902261] [2023-12-02 12:52:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:56,183 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:56,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 12:52:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:56,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:52:56,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:52:56,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:04,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 12:53:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:53:04,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165902261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:04,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:53:04,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 17 [2023-12-02 12:53:04,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989585031] [2023-12-02 12:53:04,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:53:04,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 12:53:04,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 12:53:04,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=251, Unknown=5, NotChecked=0, Total=306 [2023-12-02 12:53:04,198 INFO L87 Difference]: Start difference. First operand 106 states and 149 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:53:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:06,155 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2023-12-02 12:53:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:53:06,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 28 [2023-12-02 12:53:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:06,157 INFO L225 Difference]: With dead ends: 154 [2023-12-02 12:53:06,158 INFO L226 Difference]: Without dead ends: 154 [2023-12-02 12:53:06,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=126, Invalid=519, Unknown=5, NotChecked=0, Total=650 [2023-12-02 12:53:06,159 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 264 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:06,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 206 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 12:53:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-02 12:53:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2023-12-02 12:53:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 69 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2023-12-02 12:53:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2023-12-02 12:53:06,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 28 [2023-12-02 12:53:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:06,166 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2023-12-02 12:53:06,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:53:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2023-12-02 12:53:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:53:06,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:06,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:06,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Ended with exit code 0 [2023-12-02 12:53:06,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 12:53:06,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:06,769 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:53:06,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1466089552, now seen corresponding path program 1 times [2023-12-02 12:53:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:06,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651665773] [2023-12-02 12:53:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:06,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:53:06,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:06,771 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:53:06,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (29)] Waiting until timeout for monitored process [2023-12-02 12:53:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:06,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:53:06,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:06,933 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 12:53:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:53:07,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:53:07,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:07,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651665773] [2023-12-02 12:53:07,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651665773] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:07,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1660608789] [2023-12-02 12:53:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:07,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:53:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:53:07,297 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:53:07,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 12:53:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:07,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:53:07,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:07,458 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 12:53:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:53:07,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:53:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1660608789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084399585] [2023-12-02 12:53:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:53:07,611 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:53:07,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 12:53:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:07,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:53:07,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:07,727 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 12:53:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:53:07,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:53:07,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084399585] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:07,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:53:07,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 11, 7, 11, 7] total 15 [2023-12-02 12:53:07,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837204789] [2023-12-02 12:53:07,883 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:53:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:53:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:53:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:53:07,884 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 12:53:10,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:12,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:14,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:16,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:18,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:20,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:21,049 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2023-12-02 12:53:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 12:53:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2023-12-02 12:53:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:21,050 INFO L225 Difference]: With dead ends: 148 [2023-12-02 12:53:21,050 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 12:53:21,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:53:21,052 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 277 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:21,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 137 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 374 Invalid, 6 Unknown, 0 Unchecked, 12.5s Time] [2023-12-02 12:53:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 12:53:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2023-12-02 12:53:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 75 states have internal predecessors, (93), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2023-12-02 12:53:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2023-12-02 12:53:21,056 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 29 [2023-12-02 12:53:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:21,056 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2023-12-02 12:53:21,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 12:53:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2023-12-02 12:53:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 12:53:21,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:21,058 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:21,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 12:53:21,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (29)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:21,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 12:53:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:21,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:53:21,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1795864062, now seen corresponding path program 1 times [2023-12-02 12:53:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710495111] [2023-12-02 12:53:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:21,660 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 12:53:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:21,660 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:53:21,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (32)] Waiting until timeout for monitored process [2023-12-02 12:53:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:21,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:53:21,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:22,169 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 15 treesize of output 1 [2023-12-02 12:53:22,677 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 15 treesize of output 7 [2023-12-02 12:53:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:22,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:53:23,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:23,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710495111] [2023-12-02 12:53:23,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710495111] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:23,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [504806915] [2023-12-02 12:53:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:23,142 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:53:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:53:23,143 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:53:23,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-12-02 12:53:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:23,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:53:23,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:23,532 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 15 treesize of output 1 [2023-12-02 12:53:23,874 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 15 treesize of output 7 [2023-12-02 12:53:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:53:23,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:53:23,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [504806915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:23,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210510274] [2023-12-02 12:53:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:23,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:23,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:53:23,953 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:53:23,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 12:53:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:24,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:53:24,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:24,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:53:24,660 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 23 treesize of output 11 [2023-12-02 12:53:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:53:24,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:53:24,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210510274] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:24,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:53:24,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 12, 7, 12, 7] total 36 [2023-12-02 12:53:24,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366422342] [2023-12-02 12:53:24,804 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:53:24,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:53:24,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:53:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:53:24,806 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 31 states have internal predecessors, (78), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-02 12:53:26,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:29,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:35,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:37,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:39,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:41,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:44,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:47,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:50,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:52,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:55,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:56,170 INFO L93 Difference]: Finished difference Result 216 states and 245 transitions. [2023-12-02 12:53:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-02 12:53:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 31 states have internal predecessors, (78), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 30 [2023-12-02 12:53:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:56,171 INFO L225 Difference]: With dead ends: 216 [2023-12-02 12:53:56,172 INFO L226 Difference]: Without dead ends: 216 [2023-12-02 12:53:56,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1013, Invalid=5149, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 12:53:56,174 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 386 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 27 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:56,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 381 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1410 Invalid, 11 Unknown, 0 Unchecked, 25.9s Time] [2023-12-02 12:53:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-02 12:53:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2023-12-02 12:53:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 90 states have internal predecessors, (108), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (17), 13 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 12:53:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2023-12-02 12:53:56,179 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 30 [2023-12-02 12:53:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:56,180 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2023-12-02 12:53:56,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 31 states have internal predecessors, (78), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-02 12:53:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2023-12-02 12:53:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 12:53:56,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:56,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:56,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (32)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:56,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-12-02 12:53:56,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:56,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:56,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:53:56,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:56,782 INFO L85 PathProgramCache]: Analyzing trace with hash 162789010, now seen corresponding path program 1 times [2023-12-02 12:53:56,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:56,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829100661] [2023-12-02 12:53:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:56,782 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 12:53:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:56,783 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:53:56,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:53:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:56,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:53:56,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:56,905 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 12:53:56,984 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 15 treesize of output 1 [2023-12-02 12:53:57,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:53:57,127 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 19 treesize of output 11 [2023-12-02 12:53:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:53:57,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:53:57,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:57,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829100661] [2023-12-02 12:53:57,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829100661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:57,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [455041621] [2023-12-02 12:53:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:57,495 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:53:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:53:57,496 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:53:57,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 12:53:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:57,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:53:57,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:57,640 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 12:53:57,682 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 15 treesize of output 1 [2023-12-02 12:53:57,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:53:57,762 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 19 treesize of output 11 [2023-12-02 12:53:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:53:57,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:54:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [455041621] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132248255] [2023-12-02 12:54:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:01,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:01,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:54:01,984 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:54:01,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 12:54:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:02,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:54:02,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:02,072 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 12:54:02,115 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 15 treesize of output 1 [2023-12-02 12:54:02,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:54:02,182 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 19 treesize of output 11 [2023-12-02 12:54:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:54:02,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:54:02,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132248255] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:02,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:54:02,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 12, 8, 12, 8] total 18 [2023-12-02 12:54:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454119902] [2023-12-02 12:54:02,402 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:54:02,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:54:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:54:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=292, Unknown=2, NotChecked=0, Total=342 [2023-12-02 12:54:02,403 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:54:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:04,316 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2023-12-02 12:54:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 12:54:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 31 [2023-12-02 12:54:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:04,318 INFO L225 Difference]: With dead ends: 156 [2023-12-02 12:54:04,319 INFO L226 Difference]: Without dead ends: 156 [2023-12-02 12:54:04,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=165, Invalid=955, Unknown=2, NotChecked=0, Total=1122 [2023-12-02 12:54:04,320 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 77 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:04,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 291 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:54:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-02 12:54:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2023-12-02 12:54:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 102 states have (on average 1.2941176470588236) internal successors, (132), 108 states have internal predecessors, (132), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (21), 15 states have call predecessors, (21), 11 states have call successors, (21) [2023-12-02 12:54:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2023-12-02 12:54:04,325 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 31 [2023-12-02 12:54:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:04,325 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2023-12-02 12:54:04,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 12:54:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2023-12-02 12:54:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 12:54:04,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:04,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:54:04,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:04,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 12:54:04,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-02 12:54:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:04,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:54:04,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -246035215, now seen corresponding path program 2 times [2023-12-02 12:54:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74187978] [2023-12-02 12:54:04,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:04,928 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 12:54:04,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:04,929 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:04,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:04,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:04,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:04,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:54:04,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:54:05,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:54:05,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:54:05,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74187978] [2023-12-02 12:54:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74187978] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:54:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:54:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:54:05,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861908711] [2023-12-02 12:54:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:54:05,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:54:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:54:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:54:05,036 INFO L87 Difference]: Start difference. First operand 129 states and 164 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 12:54:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:05,079 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2023-12-02 12:54:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:54:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-02 12:54:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:05,080 INFO L225 Difference]: With dead ends: 105 [2023-12-02 12:54:05,081 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 12:54:05,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 12:54:05,081 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:05,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 120 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:54:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 12:54:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2023-12-02 12:54:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 63 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:54:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-12-02 12:54:05,085 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 31 [2023-12-02 12:54:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:05,085 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-12-02 12:54:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 12:54:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-12-02 12:54:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 12:54:05,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:05,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:54:05,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:05,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:05,287 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:54:05,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1821445266, now seen corresponding path program 1 times [2023-12-02 12:54:05,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:05,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962149280] [2023-12-02 12:54:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:05,288 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 12:54:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:05,288 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (39)] Waiting until timeout for monitored process [2023-12-02 12:54:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:05,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:54:05,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:54:05,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:54:05,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:54:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962149280] [2023-12-02 12:54:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962149280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1586572377] [2023-12-02 12:54:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:05,501 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:54:05,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:54:05,502 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:54:05,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 12:54:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:05,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:54:05,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:54:05,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:54:05,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1586572377] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:05,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081962878] [2023-12-02 12:54:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:54:05,711 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:54:05,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 12:54:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:05,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:54:05,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:54:05,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:54:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081962878] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:06,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:54:06,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2023-12-02 12:54:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946615795] [2023-12-02 12:54:06,014 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:54:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:54:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:54:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:54:06,015 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:54:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:06,201 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2023-12-02 12:54:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:54:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 33 [2023-12-02 12:54:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:06,202 INFO L225 Difference]: With dead ends: 83 [2023-12-02 12:54:06,202 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 12:54:06,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:54:06,203 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:06,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 192 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:54:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 12:54:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2023-12-02 12:54:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 68 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:54:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-12-02 12:54:06,208 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 33 [2023-12-02 12:54:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:06,208 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-12-02 12:54:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:54:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-12-02 12:54:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:54:06,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:06,209 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 12:54:06,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 12:54:06,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (39)] Forceful destruction successful, exit code 0 [2023-12-02 12:54:06,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2023-12-02 12:54:06,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:54:06,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:54:06,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1905347661, now seen corresponding path program 2 times [2023-12-02 12:54:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:06,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233092514] [2023-12-02 12:54:06,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:06,811 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 12:54:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:06,811 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:06,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Waiting until timeout for monitored process [2023-12-02 12:54:06,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:06,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:54:06,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:06,930 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 12:54:06,936 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 12:54:07,111 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 12:54:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:07,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:07,145 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:07,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:07,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:07,296 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:07,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:07,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:07,458 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:07,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2023-12-02 12:54:07,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:07,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:54:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233092514] [2023-12-02 12:54:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233092514] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:54:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790248508] [2023-12-02 12:54:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:07,847 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:54:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:54:07,847 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:54:07,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 12:54:07,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:07,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:07,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:54:07,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:08,009 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 12:54:08,017 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 12:54:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:08,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:08,118 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:08,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:08,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:08,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:08,225 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:08,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:08,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:08,348 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:08,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2023-12-02 12:54:08,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1790248508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:54:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232091267] [2023-12-02 12:54:10,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:10,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:10,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:54:10,700 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:54:10,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 12:54:10,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:10,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:54:10,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:10,810 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 12:54:10,817 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 12:54:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:10,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:10,919 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:10,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:11,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:11,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:11,040 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:11,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:11,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:11,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:54:11,148 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:11,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2023-12-02 12:54:11,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:13,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232091267] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:54:13,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:54:13,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2023-12-02 12:54:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832879113] [2023-12-02 12:54:13,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:54:13,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:54:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:54:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=197, Unknown=1, NotChecked=28, Total=272 [2023-12-02 12:54:13,505 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:54:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:14,369 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2023-12-02 12:54:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:54:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-12-02 12:54:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:14,371 INFO L225 Difference]: With dead ends: 120 [2023-12-02 12:54:14,371 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 12:54:14,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=107, Invalid=546, Unknown=1, NotChecked=48, Total=702 [2023-12-02 12:54:14,372 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:14,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 281 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 408 Invalid, 0 Unknown, 109 Unchecked, 0.6s Time] [2023-12-02 12:54:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 12:54:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 79. [2023-12-02 12:54:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:54:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2023-12-02 12:54:14,375 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 35 [2023-12-02 12:54:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:14,375 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2023-12-02 12:54:14,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:54:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2023-12-02 12:54:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:54:14,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:14,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:54:14,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2023-12-02 12:54:14,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Ended with exit code 0 [2023-12-02 12:54:14,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-02 12:54:14,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:14,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:54:14,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1937801214, now seen corresponding path program 1 times [2023-12-02 12:54:14,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:14,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871124952] [2023-12-02 12:54:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:14,978 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 12:54:14,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:14,979 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:14,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (45)] Waiting until timeout for monitored process [2023-12-02 12:54:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:15,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:54:15,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:15,062 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 12:54:15,181 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:15,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:15,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:54:15,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 12:54:17,537 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 16 treesize of output 8 [2023-12-02 12:54:17,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 12:54:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:17,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:18,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-12-02 12:54:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:18,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:54:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871124952] [2023-12-02 12:54:18,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871124952] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:18,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [105364745] [2023-12-02 12:54:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:18,281 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:54:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:54:18,282 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:54:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2023-12-02 12:54:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:18,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 12:54:18,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:18,434 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 12:54:18,485 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:18,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:18,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:54:18,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 12:54:20,704 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 16 treesize of output 8 [2023-12-02 12:54:20,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 12:54:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:20,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:25,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-12-02 12:54:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [105364745] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:25,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028473143] [2023-12-02 12:54:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:25,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:25,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:54:25,168 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:54:25,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 12:54:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:25,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 12:54:25,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:25,254 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 12:54:25,313 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:54:25,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:54:25,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:54:27,404 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_70| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_70|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_70|))) is different from true [2023-12-02 12:54:27,569 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 16 treesize of output 8 [2023-12-02 12:54:27,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 12:54:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 12:54:27,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:27,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-02 12:54:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:54:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028473143] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:28,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:54:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14, 12, 15, 14] total 36 [2023-12-02 12:54:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127446168] [2023-12-02 12:54:28,676 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:54:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:54:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:54:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=4, NotChecked=68, Total=1332 [2023-12-02 12:54:28,678 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 12:54:30,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:54:32,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:54:34,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:54:39,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:54:41,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:54:43,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:54:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:47,347 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2023-12-02 12:54:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 12:54:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 35 [2023-12-02 12:54:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:47,348 INFO L225 Difference]: With dead ends: 134 [2023-12-02 12:54:47,348 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 12:54:47,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 157 SyntacticMatches, 14 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=646, Invalid=3514, Unknown=4, NotChecked=126, Total=4290 [2023-12-02 12:54:47,350 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 270 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 41 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:47,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 265 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 929 Invalid, 6 Unknown, 125 Unchecked, 13.8s Time] [2023-12-02 12:54:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 12:54:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2023-12-02 12:54:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 73 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:54:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2023-12-02 12:54:47,355 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 35 [2023-12-02 12:54:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:47,355 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2023-12-02 12:54:47,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 12:54:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2023-12-02 12:54:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 12:54:47,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:47,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 12:54:47,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (45)] Ended with exit code 0 [2023-12-02 12:54:47,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2023-12-02 12:54:47,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 12:54:47,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:47,957 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:54:47,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1788843013, now seen corresponding path program 1 times [2023-12-02 12:54:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972338652] [2023-12-02 12:54:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:54:47,958 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 12:54:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:47,959 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:54:47,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Waiting until timeout for monitored process [2023-12-02 12:54:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:54:48,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:54:48,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:48,490 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 15 treesize of output 1 [2023-12-02 12:54:48,671 INFO L349 Elim1Store]: treesize reduction 61, result has 33.0 percent of original size [2023-12-02 12:54:48,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 155 [2023-12-02 12:54:48,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-12-02 12:54:49,019 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 82 treesize of output 50 [2023-12-02 12:54:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:54:57,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:55:01,350 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_142| (_ BitVec 32))) (or (= (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_142| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_142|))))) is different from false [2023-12-02 12:55:01,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:55:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972338652] [2023-12-02 12:55:01,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972338652] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:55:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797663683] [2023-12-02 12:55:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:01,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:55:01,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:55:01,353 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:55:01,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2023-12-02 12:55:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:55:01,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:55:01,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:04,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:55:04,803 INFO L349 Elim1Store]: treesize reduction 134, result has 25.1 percent of original size [2023-12-02 12:55:04,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 121 treesize of output 173 [2023-12-02 12:55:04,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:55:04,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 73 [2023-12-02 12:55:05,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-12-02 12:55:06,368 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_#t~mem46#1.base_39| (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (select (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_39| v_DerPreprocessor_15) |ULTIMATE.start_entry_point_~array~0#1.base|)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_39|) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_#t~mem46#1.base_39| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (bvadd (select (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_39| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv1 1)) (_ bv0 1))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2023-12-02 12:55:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:55:06,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:55:07,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-02 12:55:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1797663683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:55:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604759479] [2023-12-02 12:55:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:55:24,367 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:55:24,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 12:55:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:55:24,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 12:55:24,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:24,719 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 15 treesize of output 1 [2023-12-02 12:55:24,801 INFO L349 Elim1Store]: treesize reduction 61, result has 33.0 percent of original size [2023-12-02 12:55:24,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 155 [2023-12-02 12:55:24,846 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-12-02 12:55:24,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 11 [2023-12-02 12:55:25,056 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 82 treesize of output 50 [2023-12-02 12:55:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:55:36,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:55:46,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604759479] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:55:46,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:55:46,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2023-12-02 12:55:46,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271091184] [2023-12-02 12:55:46,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:55:46,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 12:55:46,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:55:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 12:55:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2583, Unknown=26, NotChecked=210, Total=3080 [2023-12-02 12:55:46,976 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 30 states, 27 states have (on average 2.074074074074074) internal successors, (56), 25 states have internal predecessors, (56), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:55:49,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:55:51,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:55:55,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:55:57,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:02,232 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-12-02 12:56:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:56:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.074074074074074) internal successors, (56), 25 states have internal predecessors, (56), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2023-12-02 12:56:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:02,233 INFO L225 Difference]: With dead ends: 90 [2023-12-02 12:56:02,233 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 12:56:02,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=350, Invalid=3052, Unknown=28, NotChecked=230, Total=3660 [2023-12-02 12:56:02,236 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 9 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:02,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 178 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 479 Invalid, 17 Unknown, 59 Unchecked, 9.9s Time] [2023-12-02 12:56:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 12:56:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-02 12:56:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.25) internal successors, (70), 63 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:56:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-12-02 12:56:02,238 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 37 [2023-12-02 12:56:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:02,239 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-12-02 12:56:02,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.074074074074074) internal successors, (56), 25 states have internal predecessors, (56), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:56:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-12-02 12:56:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 12:56:02,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:02,239 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:02,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:02,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:02,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Ended with exit code 0 [2023-12-02 12:56:02,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:02,840 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:56:02,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1171679818, now seen corresponding path program 1 times [2023-12-02 12:56:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:56:02,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560722011] [2023-12-02 12:56:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:02,841 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 12:56:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:56:02,842 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:02,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:02,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:56:02,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:56:02,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:56:03,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:56:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560722011] [2023-12-02 12:56:03,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560722011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374715304] [2023-12-02 12:56:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:03,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:56:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:56:03,092 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:56:03,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2023-12-02 12:56:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:03,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:56:03,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:56:03,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:56:03,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [374715304] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:03,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625688284] [2023-12-02 12:56:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:03,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:03,337 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:03,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 12:56:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:03,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:56:03,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:56:03,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:56:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625688284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:03,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:56:03,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2023-12-02 12:56:03,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517213794] [2023-12-02 12:56:03,525 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:03,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:56:03,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:56:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:56:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:56:03,526 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:56:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:03,837 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2023-12-02 12:56:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:56:03,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 41 [2023-12-02 12:56:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:03,839 INFO L225 Difference]: With dead ends: 123 [2023-12-02 12:56:03,839 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 12:56:03,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:56:03,840 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 205 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:03,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 174 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:56:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 12:56:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2023-12-02 12:56:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.2) internal successors, (78), 71 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:56:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2023-12-02 12:56:03,844 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 41 [2023-12-02 12:56:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:03,844 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2023-12-02 12:56:03,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:56:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2023-12-02 12:56:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:56:03,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:03,845 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:03,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2023-12-02 12:56:04,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 12:56:04,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:04,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:04,446 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:56:04,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -999443522, now seen corresponding path program 2 times [2023-12-02 12:56:04,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:56:04,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066448796] [2023-12-02 12:56:04,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:56:04,447 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 12:56:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:56:04,448 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:04,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:04,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:56:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:04,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:56:04,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:04,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:05,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-12-02 12:56:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:06,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:56:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066448796] [2023-12-02 12:56:06,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066448796] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187084780] [2023-12-02 12:56:06,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:56:06,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:56:06,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:56:06,603 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:56:06,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2023-12-02 12:56:06,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:56:06,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:06,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:56:06,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:06,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:07,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-12-02 12:56:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187084780] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51389692] [2023-12-02 12:56:07,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:56:07,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:07,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:07,972 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:07,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-02 12:56:08,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:56:08,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:08,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:56:08,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:08,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:08,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-12-02 12:56:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:08,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51389692] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:08,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:56:08,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10, 10, 10, 10] total 25 [2023-12-02 12:56:08,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629517602] [2023-12-02 12:56:08,600 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:08,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 12:56:08,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:56:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 12:56:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 12:56:08,601 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 26 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:56:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:14,937 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2023-12-02 12:56:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 12:56:14,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 42 [2023-12-02 12:56:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:14,940 INFO L225 Difference]: With dead ends: 185 [2023-12-02 12:56:14,940 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 12:56:14,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=494, Invalid=1762, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 12:56:14,941 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 691 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:14,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 345 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 12:56:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 12:56:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 94. [2023-12-02 12:56:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 82 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:56:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2023-12-02 12:56:14,946 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 42 [2023-12-02 12:56:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:14,946 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2023-12-02 12:56:14,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:56:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2023-12-02 12:56:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:56:14,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:14,947 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:14,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-12-02 12:56:15,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:15,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Ended with exit code 0 [2023-12-02 12:56:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:15,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:56:15,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1155586169, now seen corresponding path program 3 times [2023-12-02 12:56:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:56:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713313533] [2023-12-02 12:56:15,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:15,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:56:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:56:15,549 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:15,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Waiting until timeout for monitored process [2023-12-02 12:56:15,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:56:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:15,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 12:56:15,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:15,738 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 12:56:15,744 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 12:56:15,923 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 12:56:15,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:15,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:15,955 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:15,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:16,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:16,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:16,106 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:16,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:16,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:16,264 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:16,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:16,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:16,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:16,432 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:16,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 8 not checked. [2023-12-02 12:56:16,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:18,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:56:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713313533] [2023-12-02 12:56:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713313533] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1566316038] [2023-12-02 12:56:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:56:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:56:18,893 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:56:18,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2023-12-02 12:56:19,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:56:19,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:19,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 12:56:19,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:19,203 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 12:56:19,211 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 12:56:19,354 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:19,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:19,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:19,497 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:56:19,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 12:56:19,518 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:19,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:19,664 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:56:19,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 12:56:19,684 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:19,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:19,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:19,828 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:19,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 8 not checked. [2023-12-02 12:56:19,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:20,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1566316038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:20,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379288168] [2023-12-02 12:56:20,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:20,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:20,208 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:20,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-12-02 12:56:20,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:56:20,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:20,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 12:56:20,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:20,382 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 12:56:20,390 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 12:56:20,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:20,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:20,490 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:20,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:20,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:20,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:20,583 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:20,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:20,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:20,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:20,676 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:20,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:56:20,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:56:20,775 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:56:20,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:56:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 8 not checked. [2023-12-02 12:56:20,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:21,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379288168] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:21,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:56:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 16] total 20 [2023-12-02 12:56:21,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843205009] [2023-12-02 12:56:21,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:56:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:56:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:56:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=396, Unknown=1, NotChecked=40, Total=506 [2023-12-02 12:56:21,568 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:56:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:22,972 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2023-12-02 12:56:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 12:56:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-12-02 12:56:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:22,974 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:56:22,974 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:56:22,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=167, Invalid=1168, Unknown=1, NotChecked=70, Total=1406 [2023-12-02 12:56:22,975 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 170 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:22,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 327 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 602 Invalid, 0 Unknown, 115 Unchecked, 0.9s Time] [2023-12-02 12:56:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:56:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 98. [2023-12-02 12:56:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 85 states have internal predecessors, (101), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:56:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2023-12-02 12:56:22,978 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 44 [2023-12-02 12:56:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:22,978 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2023-12-02 12:56:22,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:56:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2023-12-02 12:56:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 12:56:22,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:22,979 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:22,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-12-02 12:56:23,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2023-12-02 12:56:23,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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)] Ended with exit code 0 [2023-12-02 12:56:23,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:23,580 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:56:23,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash -917978123, now seen corresponding path program 1 times [2023-12-02 12:56:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:56:23,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059503971] [2023-12-02 12:56:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:23,581 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 12:56:23,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:56:23,582 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:23,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (60)] Waiting until timeout for monitored process [2023-12-02 12:56:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:23,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:56:23,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:23,782 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 12:56:23,899 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 23 treesize of output 11 [2023-12-02 12:56:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:56:24,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:24,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:56:24,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059503971] [2023-12-02 12:56:24,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059503971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946957661] [2023-12-02 12:56:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:24,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:56:24,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:56:24,514 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:56:24,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2023-12-02 12:56:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:24,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:56:24,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:24,800 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 12:56:24,917 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 23 treesize of output 11 [2023-12-02 12:56:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:56:25,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1946957661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:25,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681967189] [2023-12-02 12:56:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:25,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:25,224 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:25,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-12-02 12:56:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:25,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:56:25,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:25,382 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 12:56:25,483 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 23 treesize of output 11 [2023-12-02 12:56:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:56:25,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681967189] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:25,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:56:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13, 9, 13, 9] total 19 [2023-12-02 12:56:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571963297] [2023-12-02 12:56:25,770 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:25,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 12:56:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:56:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 12:56:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:56:25,772 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 12:56:28,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:31,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:33,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:56:35,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:37,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:39,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:42,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:42,164 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2023-12-02 12:56:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 12:56:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2023-12-02 12:56:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:42,169 INFO L225 Difference]: With dead ends: 160 [2023-12-02 12:56:42,169 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 12:56:42,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 228 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 12:56:42,170 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 532 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 20 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:42,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 173 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 477 Invalid, 7 Unknown, 0 Unchecked, 14.9s Time] [2023-12-02 12:56:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 12:56:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2023-12-02 12:56:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 91 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:56:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2023-12-02 12:56:42,174 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 43 [2023-12-02 12:56:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:42,174 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2023-12-02 12:56:42,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 12:56:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2023-12-02 12:56:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:56:42,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:42,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:42,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:42,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (60)] Ended with exit code 0 [2023-12-02 12:56:42,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-12-02 12:56:42,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:42,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:56:42,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1607449341, now seen corresponding path program 1 times [2023-12-02 12:56:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:56:42,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175862708] [2023-12-02 12:56:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:42,776 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 12:56:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:56:42,777 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:56:42,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (63)] Waiting until timeout for monitored process [2023-12-02 12:56:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:42,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:56:42,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:43,051 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 15 treesize of output 1 [2023-12-02 12:56:43,190 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 23 treesize of output 11 [2023-12-02 12:56:43,517 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 15 treesize of output 7 [2023-12-02 12:56:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:56:43,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:44,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:56:44,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175862708] [2023-12-02 12:56:44,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175862708] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:44,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096632341] [2023-12-02 12:56:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:44,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:56:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:56:44,059 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:56:44,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2023-12-02 12:56:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:44,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:56:44,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:44,359 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 15 treesize of output 1 [2023-12-02 12:56:44,482 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 23 treesize of output 11 [2023-12-02 12:56:44,676 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 15 treesize of output 7 [2023-12-02 12:56:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:56:44,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:44,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2096632341] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:44,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286220917] [2023-12-02 12:56:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:44,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:44,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:44,838 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:44,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-12-02 12:56:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:44,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:56:44,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:45,022 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 15 treesize of output 1 [2023-12-02 12:56:45,156 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 23 treesize of output 11 [2023-12-02 12:56:45,370 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 15 treesize of output 7 [2023-12-02 12:56:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:56:45,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:56:45,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286220917] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:45,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:56:45,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 14, 9, 14, 9] total 20 [2023-12-02 12:56:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122952738] [2023-12-02 12:56:45,538 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:56:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:56:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:56:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-12-02 12:56:45,540 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 12:56:47,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:51,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:53,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:56:55,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:56:59,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:57:01,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:57:03,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:57:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:03,699 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2023-12-02 12:57:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 12:57:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 44 [2023-12-02 12:57:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:03,701 INFO L225 Difference]: With dead ends: 157 [2023-12-02 12:57:03,701 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 12:57:03,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 232 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=398, Invalid=1858, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 12:57:03,702 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 441 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:03,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 181 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 575 Invalid, 7 Unknown, 0 Unchecked, 15.6s Time] [2023-12-02 12:57:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 12:57:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2023-12-02 12:57:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 92 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:57:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2023-12-02 12:57:03,708 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 44 [2023-12-02 12:57:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:03,708 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2023-12-02 12:57:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 12:57:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2023-12-02 12:57:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:57:03,709 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:03,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:03,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2023-12-02 12:57:03,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-12-02 12:57:04,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (63)] Ended with exit code 0 [2023-12-02 12:57:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:57:04,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:57:04,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1708677897, now seen corresponding path program 1 times [2023-12-02 12:57:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:57:04,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149122808] [2023-12-02 12:57:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:04,311 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 12:57:04,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:57:04,312 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:57:04,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (66)] Waiting until timeout for monitored process [2023-12-02 12:57:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:04,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:57:04,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:04,488 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 12:57:04,584 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 15 treesize of output 1 [2023-12-02 12:57:04,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:57:04,720 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:57:04,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 12:57:04,856 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 39 treesize of output 23 [2023-12-02 12:57:04,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:57:05,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2023-12-02 12:57:05,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:57:05,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 12:57:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:57:05,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:06,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:57:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149122808] [2023-12-02 12:57:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149122808] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049618768] [2023-12-02 12:57:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:06,008 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:57:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:57:06,009 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:57:06,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2023-12-02 12:57:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:06,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:57:06,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:06,281 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 12:57:06,329 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 15 treesize of output 1 [2023-12-02 12:57:06,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:57:06,398 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:57:06,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 12:57:06,449 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 39 treesize of output 23 [2023-12-02 12:57:06,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:57:06,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2023-12-02 12:57:06,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:57:06,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 12:57:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:57:06,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049618768] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380734099] [2023-12-02 12:57:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:06,985 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:06,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-12-02 12:57:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:07,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:57:07,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:07,120 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 12:57:07,163 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 15 treesize of output 1 [2023-12-02 12:57:07,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:57:07,230 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:57:07,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 12:57:07,283 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 39 treesize of output 23 [2023-12-02 12:57:07,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:57:07,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2023-12-02 12:57:07,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:57:07,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 12:57:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:57:07,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:07,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380734099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:07,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:57:07,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2023-12-02 12:57:07,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527123004] [2023-12-02 12:57:07,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:07,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 12:57:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:57:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 12:57:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-12-02 12:57:07,822 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (4), 3 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 12:57:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:09,014 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2023-12-02 12:57:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:57:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2023-12-02 12:57:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:09,016 INFO L225 Difference]: With dead ends: 106 [2023-12-02 12:57:09,017 INFO L226 Difference]: Without dead ends: 106 [2023-12-02 12:57:09,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2023-12-02 12:57:09,017 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:09,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 264 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 12:57:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-02 12:57:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-12-02 12:57:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 92 states have internal predecessors, (105), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:57:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2023-12-02 12:57:09,021 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 45 [2023-12-02 12:57:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:09,021 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2023-12-02 12:57:09,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 4 states have call successors, (4), 3 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 12:57:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2023-12-02 12:57:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 12:57:09,022 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:09,022 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:09,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2023-12-02 12:57:09,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-12-02 12:57:09,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (66)] Ended with exit code 0 [2023-12-02 12:57:09,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:57:09,623 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:57:09,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1361922634, now seen corresponding path program 1 times [2023-12-02 12:57:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:57:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070522485] [2023-12-02 12:57:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:09,624 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 12:57:09,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:57:09,625 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:57:09,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (69)] Waiting until timeout for monitored process [2023-12-02 12:57:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:09,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:57:09,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:57:09,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:57:10,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:57:10,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070522485] [2023-12-02 12:57:10,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070522485] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:10,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458814593] [2023-12-02 12:57:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:10,036 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:57:10,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:57:10,037 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:57:10,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2023-12-02 12:57:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:10,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:57:10,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:57:10,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:57:10,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458814593] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:10,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231960721] [2023-12-02 12:57:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:10,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:10,396 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:10,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-12-02 12:57:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:10,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:57:10,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:57:10,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:57:10,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231960721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:10,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:57:10,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 19 [2023-12-02 12:57:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991870205] [2023-12-02 12:57:10,952 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:10,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:57:10,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:57:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:57:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:57:10,953 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:57:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:11,351 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2023-12-02 12:57:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:57:11,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 47 [2023-12-02 12:57:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:11,353 INFO L225 Difference]: With dead ends: 104 [2023-12-02 12:57:11,353 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 12:57:11,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-12-02 12:57:11,354 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:11,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 409 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:57:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 12:57:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2023-12-02 12:57:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 86 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:57:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2023-12-02 12:57:11,357 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 47 [2023-12-02 12:57:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:11,358 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2023-12-02 12:57:11,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:57:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2023-12-02 12:57:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 12:57:11,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:11,359 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:11,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2023-12-02 12:57:11,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (69)] Ended with exit code 0 [2023-12-02 12:57:11,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-12-02 12:57:11,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:11,960 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:57:11,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1157329895, now seen corresponding path program 2 times [2023-12-02 12:57:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:57:11,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467453783] [2023-12-02 12:57:11,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:57:11,960 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 12:57:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:57:11,961 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:57:11,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (72)] Waiting until timeout for monitored process [2023-12-02 12:57:12,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:57:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:12,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:57:12,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:12,086 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 12:57:12,173 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:12,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:12,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:57:14,283 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_125| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_145| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_125|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_145|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_125|))) is different from true [2023-12-02 12:57:14,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-12-02 12:57:16,394 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_126| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_146| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_126|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_146|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_126|))) is different from true [2023-12-02 12:57:16,574 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 16 treesize of output 8 [2023-12-02 12:57:16,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 12:57:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2023-12-02 12:57:16,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:16,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-12-02 12:57:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:57:17,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:57:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467453783] [2023-12-02 12:57:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467453783] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775972658] [2023-12-02 12:57:17,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:57:17,340 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:57:17,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:57:17,341 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:57:17,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2023-12-02 12:57:17,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:17,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557876460] [2023-12-02 12:57:17,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:57:17,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:17,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 1 [2023-12-02 12:57:17,544 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:17,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-12-02 12:57:17,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:57:17,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:17,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 12:57:17,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:17,669 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 12:57:17,710 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:17,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:17,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:57:19,748 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149|)))) is different from true [2023-12-02 12:57:19,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-12-02 12:57:21,832 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150|)))) is different from true [2023-12-02 12:57:21,953 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 16 treesize of output 8 [2023-12-02 12:57:22,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 12:57:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2023-12-02 12:57:22,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:22,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-12-02 12:57:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:57:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557876460] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:23,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 12:57:23,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17, 17] total 39 [2023-12-02 12:57:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391817089] [2023-12-02 12:57:23,696 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 12:57:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:57:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 12:57:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1114, Unknown=4, NotChecked=284, Total=1560 [2023-12-02 12:57:23,698 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 40 states, 39 states have (on average 2.717948717948718) internal successors, (106), 36 states have internal predecessors, (106), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-02 12:57:37,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:57:39,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:57:41,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:57:43,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:57:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:49,513 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2023-12-02 12:57:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-02 12:57:49,515 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.717948717948718) internal successors, (106), 36 states have internal predecessors, (106), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 49 [2023-12-02 12:57:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:49,516 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:57:49,516 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:57:49,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 146 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1265, Invalid=6401, Unknown=6, NotChecked=700, Total=8372 [2023-12-02 12:57:49,519 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 322 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 65 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:49,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 361 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1194 Invalid, 4 Unknown, 572 Unchecked, 10.8s Time] [2023-12-02 12:57:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:57:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2023-12-02 12:57:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 88 states have internal predecessors, (96), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:57:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2023-12-02 12:57:49,522 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 49 [2023-12-02 12:57:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:49,522 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2023-12-02 12:57:49,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.717948717948718) internal successors, (106), 36 states have internal predecessors, (106), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-02 12:57:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2023-12-02 12:57:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 12:57:49,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:49,523 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:49,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (72)] Ended with exit code 0 [2023-12-02 12:57:49,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-12-02 12:57:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:49,924 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:57:49,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash -521257523, now seen corresponding path program 4 times [2023-12-02 12:57:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:57:49,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330774792] [2023-12-02 12:57:49,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:57:49,924 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 12:57:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:57:49,925 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:57:49,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (75)] Waiting until timeout for monitored process [2023-12-02 12:57:50,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:57:50,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:50,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 12:57:50,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:50,091 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 12:57:50,099 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 12:57:50,291 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 12:57:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:50,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:50,327 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:50,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:50,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:50,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:50,497 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:50,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:50,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:50,678 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:50,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:50,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:50,839 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:50,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:51,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:51,023 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:51,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 10 not checked. [2023-12-02 12:57:51,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:53,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:57:53,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330774792] [2023-12-02 12:57:53,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330774792] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:53,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209460717] [2023-12-02 12:57:53,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:57:53,480 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:57:53,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:57:53,481 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:57:53,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2023-12-02 12:57:53,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:57:53,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:53,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 12:57:53,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:53,741 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 12:57:53,748 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 12:57:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:53,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:53,853 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:53,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:53,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:53,955 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:53,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:54,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:54,050 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:54,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:54,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:54,142 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:54,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:54,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:54,239 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:57:54,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 12:57:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 10 not checked. [2023-12-02 12:57:54,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209460717] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713319860] [2023-12-02 12:57:56,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:57:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:56,587 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:56,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-12-02 12:57:56,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:57:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:56,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-02 12:57:56,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:56,744 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 12:57:56,752 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 12:57:56,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:56,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:56,978 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 12:57:56,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 12:57:57,279 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 12:57:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:57,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:57,365 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-12-02 12:57:57,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-12-02 12:57:57,677 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-12-02 12:57:57,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-12-02 12:57:57,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:58,098 INFO L349 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2023-12-02 12:57:58,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2023-12-02 12:57:58,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:58,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:57:58,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:57:58,641 INFO L349 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2023-12-02 12:57:58,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2023-12-02 12:57:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 24 trivial. 22 not checked. [2023-12-02 12:57:58,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:58:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713319860] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:58:01,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:58:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2023-12-02 12:58:01,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582295460] [2023-12-02 12:58:01,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:58:01,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:58:01,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:58:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:58:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=596, Unknown=3, NotChecked=102, Total=812 [2023-12-02 12:58:01,016 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 27 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:58:04,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:58:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:58:05,407 INFO L93 Difference]: Finished difference Result 172 states and 191 transitions. [2023-12-02 12:58:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:58:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 53 [2023-12-02 12:58:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:58:05,409 INFO L225 Difference]: With dead ends: 172 [2023-12-02 12:58:05,409 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 12:58:05,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=253, Invalid=1644, Unknown=3, NotChecked=170, Total=2070 [2023-12-02 12:58:05,410 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 245 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:58:05,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 422 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 679 Invalid, 2 Unknown, 270 Unchecked, 3.5s Time] [2023-12-02 12:58:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 12:58:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 107. [2023-12-02 12:58:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 92 states have internal predecessors, (100), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 12:58:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2023-12-02 12:58:05,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 53 [2023-12-02 12:58:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:58:05,413 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2023-12-02 12:58:05,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 10 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:58:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2023-12-02 12:58:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 12:58:05,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:58:05,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:05,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 0 [2023-12-02 12:58:05,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (75)] Forceful destruction successful, exit code 0 [2023-12-02 12:58:05,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-12-02 12:58:06,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:06,015 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:58:06,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:58:06,015 INFO L85 PathProgramCache]: Analyzing trace with hash -202497366, now seen corresponding path program 2 times [2023-12-02 12:58:06,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:58:06,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450059049] [2023-12-02 12:58:06,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:58:06,016 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 12:58:06,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:58:06,017 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 12:58:06,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (78)] Waiting until timeout for monitored process [2023-12-02 12:58:06,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:58:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:58:06,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 12:58:06,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:06,467 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 15 treesize of output 1 [2023-12-02 12:58:06,549 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 12:58:06,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-12-02 12:58:13,845 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2023-12-02 12:58:13,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 137 [2023-12-02 12:58:14,195 INFO L349 Elim1Store]: treesize reduction 277, result has 18.3 percent of original size [2023-12-02 12:58:14,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 499 treesize of output 547 [2023-12-02 12:58:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:58:14,337 INFO L349 Elim1Store]: treesize reduction 77, result has 20.6 percent of original size [2023-12-02 12:58:14,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 90 [2023-12-02 12:58:14,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-12-02 12:58:18,658 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~array~0#1.base|))) (let ((.cse4 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1))) (.cse1 (select .cse5 |c_ULTIMATE.start_entry_point_~array~0#1.offset|))) (and (let ((.cse0 (select .cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~array~0#1.offset|)))) (let ((.cse3 (select |c_#valid| .cse0))) (or (let ((.cse2 (store .cse4 .cse1 (select |c_#valid| .cse1)))) (and (not (= .cse0 .cse1)) (= |c_#valid| (store .cse2 .cse0 .cse3)) (= (select .cse2 .cse0) (_ bv0 1)))) (and (exists ((v_DerPreprocessor_23 (_ BitVec 1))) (= (_ bv0 1) (select (store .cse4 .cse1 v_DerPreprocessor_23) .cse0))) (= (store .cse4 .cse0 .cse3) |c_#valid|))))) (= (select .cse4 .cse1) (_ bv0 1)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= (_ bv2 32) |c_ULTIMATE.start_entry_point_~i~0#1|) (or (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_169| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153| (_ BitVec 32))) (let ((.cse6 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153|))) (and (not (= (select .cse6 (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_169|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153|)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153| (select .cse6 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_169|)))))) (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_169| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153| (_ BitVec 32))) (let ((.cse8 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153|))) (let ((.cse7 (select .cse8 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_169|))) (and (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_153| .cse7)) (= (select .cse8 (bvadd (_ bv4 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_169|)) .cse7))))))))) is different from true [2023-12-02 12:58:20,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:58:20,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2023-12-02 12:58:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-12-02 12:58:27,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:58:38,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:58:38,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450059049] [2023-12-02 12:58:38,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450059049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:58:38,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1373075883] [2023-12-02 12:58:38,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:58:38,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:58:38,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:58:38,063 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:58:38,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2023-12-02 12:58:38,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:58:38,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:58:38,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 12:58:38,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:45,508 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 15 treesize of output 1 [2023-12-02 12:58:45,707 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-12-02 12:58:45,707 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-12-02 12:58:52,247 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2023-12-02 12:58:52,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 80 [2023-12-02 12:58:52,678 INFO L349 Elim1Store]: treesize reduction 285, result has 13.9 percent of original size [2023-12-02 12:58:52,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 93 treesize of output 90 [2023-12-02 12:58:52,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:58:52,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 58 [2023-12-02 12:58:54,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:58:54,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 35 [2023-12-02 12:59:01,302 WARN L876 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem46#1.base_90| (_ BitVec 32)) (v_arrayElimCell_276 (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (and (= (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_90|) (_ bv0 1)) (= (select (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_90| (_ bv1 1)) v_arrayElimCell_276) (_ bv0 1)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= |c_#valid| (store (store (store |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_276 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_90| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))))))) is different from true [2023-12-02 12:59:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:59:01,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:59:02,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-12-02 12:59:14,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1373075883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:59:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084695802] [2023-12-02 12:59:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:59:14,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:59:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:59:14,640 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:59:14,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-12-02 12:59:14,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:59:14,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:59:14,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 12:59:14,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:59:14,885 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 15 treesize of output 1 [2023-12-02 12:59:14,919 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 12:59:14,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-12-02 12:59:18,410 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2023-12-02 12:59:18,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 137 [2023-12-02 12:59:18,611 INFO L349 Elim1Store]: treesize reduction 277, result has 18.3 percent of original size [2023-12-02 12:59:18,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 275 treesize of output 339 [2023-12-02 12:59:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:59:18,851 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2023-12-02 12:59:18,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 198 treesize of output 174 [2023-12-02 12:59:25,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:59:25,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2023-12-02 12:59:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-12-02 12:59:33,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:59:48,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084695802] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:59:48,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:59:48,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 24] total 42 [2023-12-02 12:59:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973424985] [2023-12-02 12:59:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:59:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 12:59:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:59:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 12:59:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=4721, Unknown=32, NotChecked=282, Total=5402 [2023-12-02 12:59:48,101 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 44 states, 41 states have (on average 1.975609756097561) internal successors, (81), 37 states have internal predecessors, (81), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:59:50,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:59:52,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:59:54,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:59:56,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:59:58,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:00,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:02,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:04,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:06,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:08,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:10,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:12,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:14,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:16,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:18,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:21,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:23,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:25,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:27,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:30,743 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~array~0#1.base|))) (let ((.cse1 (select .cse5 |c_ULTIMATE.start_entry_point_~array~0#1.offset|)) (.cse4 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (and (let ((.cse0 (select .cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~array~0#1.offset|)))) (let ((.cse3 (select |c_#valid| .cse0))) (or (let ((.cse2 (store .cse4 .cse1 (select |c_#valid| .cse1)))) (and (not (= .cse0 .cse1)) (= |c_#valid| (store .cse2 .cse0 .cse3)) (= (select .cse2 .cse0) (_ bv0 1)))) (and (exists ((v_DerPreprocessor_23 (_ BitVec 1))) (= (_ bv0 1) (select (store .cse4 .cse1 v_DerPreprocessor_23) .cse0))) (= (store .cse4 .cse0 .cse3) |c_#valid|))))) (= (bvadd |c_ULTIMATE.start_entry_point_~j~0#1| (_ bv1 32)) (_ bv0 32)) (= (select .cse4 .cse1) (_ bv0 1)) (exists ((|v_ULTIMATE.start_entry_point_#t~mem46#1.base_90| (_ BitVec 32)) (v_arrayElimCell_276 (_ BitVec 32))) (and (= (store (store .cse4 v_arrayElimCell_276 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_90| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_90|)) (= (_ bv0 1) (select (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_90| (_ bv1 1)) v_arrayElimCell_276)))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ BitVec 32))) (and (= (_ bv0 1) (select .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95|)) (exists ((v_DerPreprocessor_36 (_ BitVec 1)) (v_DerPreprocessor_26 (_ BitVec 1)) (v_arrayElimCell_291 (_ BitVec 32))) (and (not (= v_arrayElimCell_291 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95|)) (= (select (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (select (store (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (select (store (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| v_DerPreprocessor_36) v_arrayElimCell_291 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95|)) v_arrayElimCell_291 v_DerPreprocessor_26) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95|)) v_arrayElimCell_291) (_ bv0 1)) (= (store (store .cse4 v_arrayElimCell_291 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ bv0 1)) |c_#valid|))))) (exists ((|v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ BitVec 32))) (and (= (_ bv0 1) (select .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95|)) (exists ((v_DerPreprocessor_23 (_ BitVec 1)) (v_arrayElimCell_291 (_ BitVec 32))) (and (= (select (store .cse4 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| v_DerPreprocessor_23) v_arrayElimCell_291) (_ bv0 1)) (= (store (store .cse4 v_arrayElimCell_291 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ bv0 1)) |c_#valid|)))))) (= (_ bv2 32) |c_ULTIMATE.start_entry_point_~i~0#1|)))) is different from true [2023-12-02 13:00:38,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:40,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:42,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:44,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:46,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:48,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:49,129 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2023-12-02 13:00:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 13:00:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.975609756097561) internal successors, (81), 37 states have internal predecessors, (81), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 51 [2023-12-02 13:00:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:49,131 INFO L225 Difference]: With dead ends: 112 [2023-12-02 13:00:49,131 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 13:00:49,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 158 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 91.0s TimeCoverageRelationStatistics Valid=480, Invalid=5660, Unknown=34, NotChecked=468, Total=6642 [2023-12-02 13:00:49,134 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 5 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 54.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:49,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 397 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1039 Invalid, 32 Unknown, 192 Unchecked, 54.1s Time] [2023-12-02 13:00:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 13:00:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-12-02 13:00:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 76 states have internal predecessors, (82), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 13:00:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-12-02 13:00:49,138 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 51 [2023-12-02 13:00:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:49,138 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-12-02 13:00:49,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.975609756097561) internal successors, (81), 37 states have internal predecessors, (81), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 13:00:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-12-02 13:00:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 13:00:49,139 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:49,140 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:49,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-12-02 13:00:49,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (78)] Ended with exit code 0 [2023-12-02 13:00:49,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2023-12-02 13:00:49,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:00:49,744 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 13:00:49,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2143742499, now seen corresponding path program 2 times [2023-12-02 13:00:49,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:00:49,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739927973] [2023-12-02 13:00:49,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:00:49,745 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 13:00:49,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:00:49,746 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 13:00:49,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (81)] Waiting until timeout for monitored process [2023-12-02 13:00:49,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:00:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:00:49,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 13:00:49,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:50,009 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 13:00:50,115 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 15 treesize of output 1 [2023-12-02 13:00:50,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 13:00:50,237 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 13:00:50,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 13:00:50,365 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 39 treesize of output 23 [2023-12-02 13:00:50,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 13:00:50,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2023-12-02 13:00:50,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:00:50,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 13:00:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:00:50,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:51,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:00:51,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739927973] [2023-12-02 13:00:51,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739927973] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:00:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143066828] [2023-12-02 13:00:51,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:00:51,534 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:00:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:00:51,535 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:00:51,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2023-12-02 13:00:51,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:00:51,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108333505] [2023-12-02 13:00:51,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:00:51,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:51,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:51,788 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:51,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 1 [2023-12-02 13:00:51,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-12-02 13:00:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:00:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:00:51,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:00:51,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:52,283 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 13:00:52,507 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 15 treesize of output 1 [2023-12-02 13:00:52,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 13:00:52,655 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 13:00:52,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 13:00:52,903 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 39 treesize of output 23 [2023-12-02 13:00:53,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 13:00:53,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2023-12-02 13:00:53,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:00:53,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 13:00:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:00:53,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108333505] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:00:54,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:00:54,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 31 [2023-12-02 13:00:54,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731255113] [2023-12-02 13:00:54,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:00:54,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:00:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:00:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:00:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:00:54,173 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 26 states have internal predecessors, (58), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:00:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:55,693 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2023-12-02 13:00:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 13:00:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 26 states have internal predecessors, (58), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 54 [2023-12-02 13:00:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:55,695 INFO L225 Difference]: With dead ends: 102 [2023-12-02 13:00:55,695 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 13:00:55,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=239, Invalid=2017, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 13:00:55,696 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:55,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 362 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 13:00:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 13:00:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-12-02 13:00:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 88 states have internal predecessors, (95), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 13:00:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2023-12-02 13:00:55,700 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 54 [2023-12-02 13:00:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:55,700 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2023-12-02 13:00:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 26 states have internal predecessors, (58), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:00:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2023-12-02 13:00:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 13:00:55,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:55,702 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:55,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-12-02 13:00:55,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (81)] Ended with exit code 0 [2023-12-02 13:00:56,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 13:00:56,102 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 13:00:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1447731229, now seen corresponding path program 3 times [2023-12-02 13:00:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:00:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855784168] [2023-12-02 13:00:56,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:00:56,103 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 13:00:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:00:56,104 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 13:00:56,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (84)] Waiting until timeout for monitored process [2023-12-02 13:00:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:00:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:00:56,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:00:56,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 13:00:58,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:00:59,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-12-02 13:01:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 13:01:02,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:01:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855784168] [2023-12-02 13:01:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855784168] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [42240854] [2023-12-02 13:01:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:02,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:01:02,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:01:02,178 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:01:02,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2023-12-02 13:01:02,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:01:02,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:02,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:01:02,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:01:08,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:13,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 13:01:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:01:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [42240854] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:13,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028043339] [2023-12-02 13:01:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:13,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:13,683 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:13,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-12-02 13:01:14,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:01:14,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:14,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:01:14,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:01:21,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:25,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 13:01:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:01:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028043339] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:25,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:01:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 16, 14, 15, 15] total 60 [2023-12-02 13:01:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107459060] [2023-12-02 13:01:25,887 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:01:25,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 13:01:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:01:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 13:01:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3276, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 13:01:25,889 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 61 states, 60 states have (on average 2.25) internal successors, (135), 61 states have internal predecessors, (135), 14 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 13:01:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:48,375 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2023-12-02 13:01:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 13:01:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.25) internal successors, (135), 61 states have internal predecessors, (135), 14 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 56 [2023-12-02 13:01:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:48,378 INFO L225 Difference]: With dead ends: 146 [2023-12-02 13:01:48,378 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 13:01:48,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=1512, Invalid=6678, Unknown=0, NotChecked=0, Total=8190 [2023-12-02 13:01:48,380 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 680 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:48,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 422 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 13:01:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 13:01:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2023-12-02 13:01:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 89 states have internal predecessors, (97), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 13:01:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2023-12-02 13:01:48,383 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 56 [2023-12-02 13:01:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:48,383 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2023-12-02 13:01:48,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.25) internal successors, (135), 61 states have internal predecessors, (135), 14 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 13:01:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2023-12-02 13:01:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 13:01:48,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:48,384 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:48,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2023-12-02 13:01:48,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (84)] Ended with exit code 0 [2023-12-02 13:01:48,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2023-12-02 13:01:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:01:48,985 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 13:01:48,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1447731230, now seen corresponding path program 2 times [2023-12-02 13:01:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:01:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296590499] [2023-12-02 13:01:48,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:01:48,986 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 13:01:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:01:48,986 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 13:01:48,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (87)] Waiting until timeout for monitored process [2023-12-02 13:01:49,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:01:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:49,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 13:01:49,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:49,319 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:01:49,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:01:49,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:01:51,474 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_172| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_172|) (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_172|))) is different from true [2023-12-02 13:01:51,556 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 24 treesize of output 12 [2023-12-02 13:01:53,620 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_173| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_173| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_173|) (_ bv4 32))))) is different from true [2023-12-02 13:01:53,886 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 16 treesize of output 8 [2023-12-02 13:01:53,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 13:01:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 16 not checked. [2023-12-02 13:01:53,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:01:54,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-12-02 13:01:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:01:54,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:01:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296590499] [2023-12-02 13:01:54,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296590499] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:01:54,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303161689] [2023-12-02 13:01:54,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:01:54,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:01:54,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:01:54,613 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:01:54,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2023-12-02 13:01:54,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:01:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941563096] [2023-12-02 13:01:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:01:54,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:54,853 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:54,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-12-02 13:01:54,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 1 [2023-12-02 13:01:54,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:01:54,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:54,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 13:01:54,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:55,352 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:01:55,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:01:55,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:01:57,661 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_178| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_178|) (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_178|))) is different from true [2023-12-02 13:01:57,809 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 24 treesize of output 12 [2023-12-02 13:01:59,924 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_179| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_179|) (_ bv4 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_179|))) is different from true [2023-12-02 13:02:00,085 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 16 treesize of output 8 [2023-12-02 13:02:00,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 13:02:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 16 not checked. [2023-12-02 13:02:00,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:00,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-12-02 13:02:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:02:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941563096] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:01,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 13:02:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 20, 15] total 44 [2023-12-02 13:02:01,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332375966] [2023-12-02 13:02:01,890 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 13:02:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:02:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 13:02:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1485, Unknown=4, NotChecked=324, Total=1980 [2023-12-02 13:02:01,891 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 45 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 39 states have internal predecessors, (109), 15 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (18), 16 states have call predecessors, (18), 15 states have call successors, (18) [2023-12-02 13:02:16,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:02:19,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:02:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:02:23,393 INFO L93 Difference]: Finished difference Result 164 states and 177 transitions. [2023-12-02 13:02:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 13:02:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 39 states have internal predecessors, (109), 15 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (18), 16 states have call predecessors, (18), 15 states have call successors, (18) Word has length 56 [2023-12-02 13:02:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:02:23,396 INFO L225 Difference]: With dead ends: 164 [2023-12-02 13:02:23,396 INFO L226 Difference]: Without dead ends: 164 [2023-12-02 13:02:23,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=883, Invalid=5605, Unknown=8, NotChecked=644, Total=7140 [2023-12-02 13:02:23,397 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 527 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 630 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:02:23,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 472 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1237 Invalid, 2 Unknown, 630 Unchecked, 6.7s Time] [2023-12-02 13:02:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-02 13:02:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 107. [2023-12-02 13:02:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 92 states have internal predecessors, (99), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 13:02:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2023-12-02 13:02:23,401 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 56 [2023-12-02 13:02:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:02:23,401 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2023-12-02 13:02:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 39 states have internal predecessors, (109), 15 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (18), 16 states have call predecessors, (18), 15 states have call successors, (18) [2023-12-02 13:02:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2023-12-02 13:02:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 13:02:23,402 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:02:23,402 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:02:23,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (87)] Ended with exit code 0 [2023-12-02 13:02:23,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-12-02 13:02:23,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:23,803 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 13:02:23,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:02:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1929995152, now seen corresponding path program 2 times [2023-12-02 13:02:23,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:02:23,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47733501] [2023-12-02 13:02:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:02:23,804 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 13:02:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:02:23,805 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 13:02:23,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/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 (90)] Waiting until timeout for monitored process [2023-12-02 13:02:23,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:02:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:23,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:02:23,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:24,075 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 13:02:24,220 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 23 treesize of output 11 [2023-12-02 13:02:24,359 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 23 treesize of output 11 [2023-12-02 13:02:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:02:24,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 13:02:25,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:02:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47733501] [2023-12-02 13:02:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47733501] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1251267906] [2023-12-02 13:02:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:02:25,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:02:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:02:25,757 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:02:25,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2023-12-02 13:02:26,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:02:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50178505] [2023-12-02 13:02:26,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:02:26,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:02:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:02:26,037 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:02:26,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-12-02 13:02:26,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048da828-be6c-4825-ab96-eb980f190ed0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 1 [2023-12-02 13:02:26,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:02:26,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:02:26,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 13:02:26,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:02:26,610 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 13:02:26,847 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 23 treesize of output 11 [2023-12-02 13:02:27,093 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 23 treesize of output 11 [2023-12-02 13:02:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 13:02:27,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 13:02:29,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50178505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:02:29,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 13:02:29,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17, 14] total 43 [2023-12-02 13:02:29,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544782820] [2023-12-02 13:02:29,349 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 13:02:29,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 13:02:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:02:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 13:02:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 13:02:29,351 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 44 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 38 states have internal predecessors, (114), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2023-12-02 13:02:36,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:02:38,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:02:40,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:02:42,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:03:02,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:03:04,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:04:03,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:04:37,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:04:39,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:04:41,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:04:43,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:05:18,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:06:45,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:07:04,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]