./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/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 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:34:58,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:34:58,939 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 12:34:58,944 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:34:58,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:34:58,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:34:58,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:34:58,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:34:58,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:34:58,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:34:58,974 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:34:58,974 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:34:58,975 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:34:58,975 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:34:58,976 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:34:58,976 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:34:58,977 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:34:58,977 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:34:58,978 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:34:58,979 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:34:58,979 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:34:58,980 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:34:58,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:34:58,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:34:58,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:34:58,982 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:34:58,983 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:34:58,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:34:58,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:34:58,997 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:34:58,998 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:34:58,998 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:34:58,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:34:58,999 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:34:58,999 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:34:59,000 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:34:59,000 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:34:59,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:34:59,001 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:34:59,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:34:59,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:34:59,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:34:59,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:34:59,002 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:34:59,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:34:59,003 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:34:59,003 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:34:59,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:34:59,003 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_906f299a-990e-4319-97c1-9abd4e79311e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2023-12-02 12:34:59,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:34:59,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:34:59,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:34:59,260 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:34:59,261 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:34:59,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2023-12-02 12:35:02,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:35:02,372 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:35:02,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2023-12-02 12:35:02,389 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data/1c184fd87/1a6f9746af9549838c2417c7c37841c5/FLAG05dec2c5d [2023-12-02 12:35:02,401 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data/1c184fd87/1a6f9746af9549838c2417c7c37841c5 [2023-12-02 12:35:02,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:35:02,405 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:35:02,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:35:02,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:35:02,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:35:02,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:35:02" (1/1) ... [2023-12-02 12:35:02,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5109e824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:02, skipping insertion in model container [2023-12-02 12:35:02,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:35:02" (1/1) ... [2023-12-02 12:35:02,455 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:35:02,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:35:02,799 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 12:35:02,800 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ef1f54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:02, skipping insertion in model container [2023-12-02 12:35:02,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:35:02,801 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 12:35:02,802 INFO L158 Benchmark]: Toolchain (without parser) took 396.71ms. Allocated memory is still 153.1MB. Free memory was 112.2MB in the beginning and 97.8MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 12:35:02,803 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 153.1MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:35:02,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.22ms. Allocated memory is still 153.1MB. Free memory was 111.8MB in the beginning and 97.8MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 12:35:02,805 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 153.1MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.22ms. Allocated memory is still 153.1MB. Free memory was 111.8MB in the beginning and 97.8MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/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 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:35:04,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:35:04,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 12:35:04,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:35:04,642 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:35:04,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:35:04,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:35:04,677 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:35:04,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:35:04,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:35:04,678 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:35:04,679 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:35:04,679 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:35:04,680 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:35:04,680 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:35:04,681 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:35:04,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:35:04,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:35:04,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:35:04,683 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:35:04,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:35:04,687 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:35:04,687 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:35:04,688 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:35:04,688 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:35:04,688 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:35:04,689 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:35:04,689 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:35:04,690 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 12:35:04,690 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 12:35:04,690 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:35:04,691 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:35:04,691 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:35:04,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:35:04,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 12:35:04,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:35:04,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:35:04,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:35:04,692 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:35:04,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:35:04,693 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 12:35:04,693 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:04,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:35:04,693 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:35:04,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:35:04,694 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_906f299a-990e-4319-97c1-9abd4e79311e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2023-12-02 12:35:04,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:35:05,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:35:05,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:35:05,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:35:05,006 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:35:05,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2023-12-02 12:35:07,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:35:08,082 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:35:08,082 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2023-12-02 12:35:08,099 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data/591fbc7d9/a36c0c667e3f45ceb8e5334da7706693/FLAG5bf8899b2 [2023-12-02 12:35:08,114 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/data/591fbc7d9/a36c0c667e3f45ceb8e5334da7706693 [2023-12-02 12:35:08,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:35:08,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:35:08,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:35:08,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:35:08,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:35:08,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e7170a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08, skipping insertion in model container [2023-12-02 12:35:08,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,177 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:35:08,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:35:08,540 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 12:35:08,558 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:35:08,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:35:08,624 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:35:08,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:35:08,703 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:35:08,709 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:35:08,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08 WrapperNode [2023-12-02 12:35:08,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:35:08,710 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:35:08,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:35:08,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:35:08,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,738 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,756 INFO L138 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 53 [2023-12-02 12:35:08,757 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:35:08,757 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:35:08,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:35:08,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:35:08,765 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,775 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,786 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:35:08,787 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:35:08,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:35:08,788 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:35:08,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (1/1) ... [2023-12-02 12:35:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:35:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:08,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:35:08,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:35:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 12:35:08,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 12:35:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:35:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:35:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:35:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:35:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:35:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 12:35:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:35:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:35:08,990 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:35:08,991 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:35:09,167 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:35:09,197 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:35:09,197 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 12:35:09,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:35:09 BoogieIcfgContainer [2023-12-02 12:35:09,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:35:09,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:35:09,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:35:09,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:35:09,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:35:08" (1/3) ... [2023-12-02 12:35:09,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4788d259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:35:09, skipping insertion in model container [2023-12-02 12:35:09,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:08" (2/3) ... [2023-12-02 12:35:09,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4788d259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:35:09, skipping insertion in model container [2023-12-02 12:35:09,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:35:09" (3/3) ... [2023-12-02 12:35:09,205 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18_2.i [2023-12-02 12:35:09,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:35:09,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-12-02 12:35:09,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:35:09,261 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;@5bdbd0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:35:09,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-12-02 12:35:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.9) internal successors, (38), 31 states have internal predecessors, (38), 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 12:35:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:35:09,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:09,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:09,271 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 12:35:09,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 122895915, now seen corresponding path program 1 times [2023-12-02 12:35:09,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:09,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932766704] [2023-12-02 12:35:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:09,286 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 12:35:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:09,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:09,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:09,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:09,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:09,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:09,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932766704] [2023-12-02 12:35:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932766704] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:09,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:09,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:35:09,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131148090] [2023-12-02 12:35:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:35:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:35:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:35:09,502 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.9) internal successors, (38), 31 states have internal predecessors, (38), 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 12:35:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:09,653 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-12-02 12:35:09,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:35:09,656 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 12:35:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:09,663 INFO L225 Difference]: With dead ends: 62 [2023-12-02 12:35:09,663 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:35:09,664 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 12:35:09,668 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:09,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 93 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:35:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2023-12-02 12:35:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 33 states have internal predecessors, (38), 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 12:35:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-12-02 12:35:09,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 10 [2023-12-02 12:35:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:09,703 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-12-02 12:35:09,703 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 12:35:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-12-02 12:35:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:35:09,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:09,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:09,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:09,907 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 12:35:09,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1010399596, now seen corresponding path program 1 times [2023-12-02 12:35:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354910545] [2023-12-02 12:35:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:09,909 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 12:35:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:09,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:09,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:09,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:09,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:10,000 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 12:35:10,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:10,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354910545] [2023-12-02 12:35:10,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354910545] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:10,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:10,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:35:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780115186] [2023-12-02 12:35:10,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:10,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:35:10,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:35:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:35:10,005 INFO L87 Difference]: Start difference. First operand 38 states and 44 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 12:35:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:10,115 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-12-02 12:35:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:35:10,115 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 12:35:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:10,117 INFO L225 Difference]: With dead ends: 63 [2023-12-02 12:35:10,117 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:35:10,117 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 12:35:10,119 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:10,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 123 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:35:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2023-12-02 12:35:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 37 states have internal predecessors, (44), 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 12:35:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-12-02 12:35:10,127 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 10 [2023-12-02 12:35:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:10,128 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-12-02 12:35:10,128 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 12:35:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-12-02 12:35:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 12:35:10,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:10,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:10,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:35:10,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:10,332 INFO L85 PathProgramCache]: Analyzing trace with hash -485181428, now seen corresponding path program 1 times [2023-12-02 12:35:10,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:10,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495894228] [2023-12-02 12:35:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:10,333 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 12:35:10,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:10,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:10,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:10,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:10,439 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 12:35:10,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:10,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:10,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495894228] [2023-12-02 12:35:10,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495894228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:10,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:10,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:35:10,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612646126] [2023-12-02 12:35:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:10,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:35:10,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:35:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:35:10,443 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:35:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:10,508 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2023-12-02 12:35:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:35:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 12:35:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:10,510 INFO L225 Difference]: With dead ends: 72 [2023-12-02 12:35:10,510 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 12:35:10,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 12:35:10,512 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 58 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 12:35:10,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 58 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 12:35:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2023-12-02 12:35:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 38 states have internal predecessors, (45), 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 12:35:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-12-02 12:35:10,522 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 11 [2023-12-02 12:35:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:10,523 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-12-02 12:35:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:35:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-12-02 12:35:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:35:10,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:10,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:10,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:35:10,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,725 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 12:35:10,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1575928526, now seen corresponding path program 1 times [2023-12-02 12:35:10,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:10,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072885938] [2023-12-02 12:35:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:10,726 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 12:35:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:10,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:10,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:35:10,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:10,819 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 12:35:10,967 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:35:10,968 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 12:35:10,982 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 12:35:10,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:13,821 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 12:35:13,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072885938] [2023-12-02 12:35:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072885938] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1496504728] [2023-12-02 12:35:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:13,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:13,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:13,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 12:35:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:13,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:35:13,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:13,962 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 12:35:13,995 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 12:35:14,017 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 12:35:14,018 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 12:35:14,042 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 12:35:14,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:16,249 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 12:35:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1496504728] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841603570] [2023-12-02 12:35:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:16,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:16,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:16,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:16,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:35:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:16,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:35:16,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:16,333 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 12:35:16,402 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:35:16,403 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 12:35:16,412 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 12:35:16,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:18,711 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 12:35:18,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841603570] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:18,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:35:18,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2023-12-02 12:35:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399597179] [2023-12-02 12:35:18,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:18,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:35:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:18,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:35:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-12-02 12:35:18,715 INFO L87 Difference]: Start difference. First operand 44 states and 54 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 12:35:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:18,928 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-12-02 12:35:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:35:18,928 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 12:35:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:18,929 INFO L225 Difference]: With dead ends: 62 [2023-12-02 12:35:18,930 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 12:35:18,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=22, Invalid=53, Unknown=1, NotChecked=14, Total=90 [2023-12-02 12:35:18,931 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:18,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2023-12-02 12:35:18,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 12:35:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-12-02 12:35:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.625) internal successors, (65), 49 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:35:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2023-12-02 12:35:18,938 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 17 [2023-12-02 12:35:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:18,938 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2023-12-02 12:35:18,938 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 12:35:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2023-12-02 12:35:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:35:18,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:18,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:18,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:35:19,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 12:35:19,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 12:35:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:19,540 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 12:35:19,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1575928527, now seen corresponding path program 1 times [2023-12-02 12:35:19,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284038207] [2023-12-02 12:35:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:19,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:19,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:19,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:19,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:35:19,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:19,608 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 12:35:19,614 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 12:35:19,803 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 12:35:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:19,835 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 12:35:19,849 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:19,849 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 12:35:19,899 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 12:35:19,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:20,341 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284038207] [2023-12-02 12:35:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284038207] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1338268254] [2023-12-02 12:35:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:20,342 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:20,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:20,343 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:20,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 12:35:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:20,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:35:20,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:20,478 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 12:35:20,484 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 12:35:20,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:20,616 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 12:35:20,628 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:20,629 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 12:35:20,655 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 12:35:20,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:22,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1338268254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:22,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217387467] [2023-12-02 12:35:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:22,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:22,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:22,964 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:22,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:35:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:23,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:35:23,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:23,037 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 12:35:23,045 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 12:35:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:23,175 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 12:35:23,189 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:23,190 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 12:35:23,220 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 12:35:23,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:23,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217387467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:23,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:35:23,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-12-02 12:35:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994378292] [2023-12-02 12:35:23,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:35:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:35:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=88, Unknown=1, NotChecked=18, Total=132 [2023-12-02 12:35:23,491 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 8 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 12:35:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:23,983 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-12-02 12:35:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.625) internal successors, (13), 8 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 12:35:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:23,985 INFO L225 Difference]: With dead ends: 92 [2023-12-02 12:35:23,985 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 12:35:23,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-12-02 12:35:23,986 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 79 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:23,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 131 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 235 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2023-12-02 12:35:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 12:35:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2023-12-02 12:35:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.6538461538461537) internal successors, (86), 61 states have internal predecessors, (86), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 12:35:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2023-12-02 12:35:23,996 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 17 [2023-12-02 12:35:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:23,996 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2023-12-02 12:35:23,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.625) internal successors, (13), 8 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 12:35:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2023-12-02 12:35:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:35:23,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:23,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:23,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:35:24,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:35:24,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 12:35:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:24,599 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 12:35:24,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1070369901, now seen corresponding path program 1 times [2023-12-02 12:35:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853104041] [2023-12-02 12:35:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:24,600 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 12:35:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:24,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:24,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:24,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:35:24,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:24,680 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 12:35:24,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:24,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:24,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853104041] [2023-12-02 12:35:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853104041] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:24,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:24,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:35:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837829136] [2023-12-02 12:35:24,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:24,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:35:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:35:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:35:24,682 INFO L87 Difference]: Start difference. First operand 70 states and 101 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 12:35:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:24,745 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2023-12-02 12:35:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:35:24,746 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 12:35:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:24,746 INFO L225 Difference]: With dead ends: 56 [2023-12-02 12:35:24,746 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 12:35:24,747 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 12:35:24,747 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:24,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 12:35:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-02 12:35:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 49 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:35:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2023-12-02 12:35:24,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 17 [2023-12-02 12:35:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:24,752 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2023-12-02 12:35:24,752 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 12:35:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2023-12-02 12:35:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 12:35:24,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:24,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:24,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:24,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:24,954 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 12:35:24,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:24,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1609194569, now seen corresponding path program 1 times [2023-12-02 12:35:24,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:24,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930764178] [2023-12-02 12:35:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:24,955 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 12:35:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:24,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:24,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:25,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:25,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:25,028 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 12:35:25,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:25,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930764178] [2023-12-02 12:35:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930764178] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:25,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:35:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520434745] [2023-12-02 12:35:25,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:25,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:35:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:35:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:35:25,030 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:35:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:25,096 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-12-02 12:35:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:35:25,096 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), 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 18 [2023-12-02 12:35:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:25,097 INFO L225 Difference]: With dead ends: 66 [2023-12-02 12:35:25,097 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 12:35:25,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 12:35:25,098 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:25,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 12:35:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2023-12-02 12:35:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 51 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:35:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2023-12-02 12:35:25,105 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 18 [2023-12-02 12:35:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:25,105 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2023-12-02 12:35:25,105 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), 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 12:35:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2023-12-02 12:35:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 12:35:25,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:25,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:25,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 12:35:25,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,308 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 12:35:25,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1798269046, now seen corresponding path program 1 times [2023-12-02 12:35:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577102513] [2023-12-02 12:35:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:25,309 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 12:35:25,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:25,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:25,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:25,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:25,374 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 12:35:25,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:25,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577102513] [2023-12-02 12:35:25,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577102513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:25,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:25,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:35:25,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602409891] [2023-12-02 12:35:25,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:25,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:35:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:25,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:35:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:35:25,376 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12:35:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:25,444 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-12-02 12:35:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:35:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2023-12-02 12:35:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:25,446 INFO L225 Difference]: With dead ends: 55 [2023-12-02 12:35:25,446 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:35:25,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 12:35:25,447 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:25,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:35:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-12-02 12:35:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.5) internal successors, (54), 44 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:35:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-12-02 12:35:25,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 18 [2023-12-02 12:35:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:25,452 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-12-02 12:35:25,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12:35:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-12-02 12:35:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:35:25,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:25,453 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 12:35:25,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:35:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,655 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 12:35:25,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash 88232968, now seen corresponding path program 1 times [2023-12-02 12:35:25,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:25,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658608221] [2023-12-02 12:35:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:25,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:25,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:25,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:35:25,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:25,870 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 12:35:25,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:25,970 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 12:35:25,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658608221] [2023-12-02 12:35:25,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658608221] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492017388] [2023-12-02 12:35:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:25,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:25,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:25,972 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:25,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-02 12:35:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:26,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:26,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:26,093 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 12:35:26,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:26,138 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 12:35:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492017388] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:26,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977955882] [2023-12-02 12:35:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:26,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:26,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:26,139 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:26,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:35:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:26,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:26,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:26,227 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 12:35:26,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:26,261 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 12:35:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977955882] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:26,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:35:26,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 12:35:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921000651] [2023-12-02 12:35:26,262 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:35:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:35:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:35:26,263 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 12:35:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:26,447 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-12-02 12:35:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 19 [2023-12-02 12:35:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:26,448 INFO L225 Difference]: With dead ends: 54 [2023-12-02 12:35:26,448 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 12:35:26,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:35:26,449 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:26,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 83 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:35:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 12:35:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 12:35:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 44 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:35:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-12-02 12:35:26,452 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 19 [2023-12-02 12:35:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:26,452 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-12-02 12:35:26,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 12:35:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-12-02 12:35:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 12:35:26,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:26,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:26,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:35:26,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2023-12-02 12:35:26,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:27,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:35:27,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash 200628090, now seen corresponding path program 1 times [2023-12-02 12:35:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430568754] [2023-12-02 12:35:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:27,055 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 12:35:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:27,056 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:27,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:27,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:27,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:27,160 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 12:35:27,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:27,234 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 12:35:27,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:27,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430568754] [2023-12-02 12:35:27,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430568754] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:27,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [160776724] [2023-12-02 12:35:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:27,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:27,236 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:27,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 12:35:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:27,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:27,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:27,377 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 12:35:27,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:27,409 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 12:35:27,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [160776724] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:27,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287929000] [2023-12-02 12:35:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:27,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:27,411 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:27,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 12:35:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:27,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:35:27,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:27,515 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 12:35:27,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:27,548 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 12:35:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287929000] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:27,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:35:27,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-12-02 12:35:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108249351] [2023-12-02 12:35:27,548 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:27,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:35:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:35:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:35:27,550 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 12:35:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:27,691 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2023-12-02 12:35:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:35:27,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 20 [2023-12-02 12:35:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:27,693 INFO L225 Difference]: With dead ends: 115 [2023-12-02 12:35:27,693 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 12:35:27,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 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 12:35:27,694 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 208 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:27,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 122 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 12:35:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2023-12-02 12:35:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.392156862745098) internal successors, (71), 55 states have internal predecessors, (71), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 12:35:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2023-12-02 12:35:27,700 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 20 [2023-12-02 12:35:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:27,701 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2023-12-02 12:35:27,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 12:35:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2023-12-02 12:35:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:35:27,702 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:27,702 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] [2023-12-02 12:35:27,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:27,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:28,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:28,304 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 12:35:28,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 28461917, now seen corresponding path program 1 times [2023-12-02 12:35:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427529377] [2023-12-02 12:35:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:28,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:28,306 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:28,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:28,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:35:28,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:28,479 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 12:35:28,486 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 12:35:28,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:28,576 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 12:35:28,576 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 12:35:32,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:32,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427529377] [2023-12-02 12:35:32,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427529377] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:32,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [657491149] [2023-12-02 12:35:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:32,825 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 12:35:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:32,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:35:32,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:33,112 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 12:35:33,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:33,182 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 12:35:33,183 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 12:35:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [657491149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702655385] [2023-12-02 12:35:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:35,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:35,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:35,302 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:35,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 12:35:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:35,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:35:35,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:35,460 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 12:35:35,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:35,532 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 12:35:35,532 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 12:35:37,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702655385] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:37,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:35:37,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2023-12-02 12:35:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935701658] [2023-12-02 12:35:37,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:37,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:35:37,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:35:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=85, Unknown=3, NotChecked=18, Total=132 [2023-12-02 12:35:37,660 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 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 12:35:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:37,936 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2023-12-02 12:35:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:35:37,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 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 22 [2023-12-02 12:35:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:37,938 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:35:37,938 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 12:35:37,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 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 12:35:37,939 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:37,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 149 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2023-12-02 12:35:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 12:35:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2023-12-02 12:35:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 69 states have internal predecessors, (92), 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 12:35:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2023-12-02 12:35:37,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 22 [2023-12-02 12:35:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:37,946 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2023-12-02 12:35:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 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 12:35:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2023-12-02 12:35:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:35:37,947 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:37,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:37,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2023-12-02 12:35:38,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 12:35:38,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:38,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:38,548 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 12:35:38,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:38,548 INFO L85 PathProgramCache]: Analyzing trace with hash 411670461, now seen corresponding path program 1 times [2023-12-02 12:35:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:38,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946705426] [2023-12-02 12:35:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:38,549 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 12:35:38,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:38,550 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:38,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:38,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:35:38,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:38,630 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 12:35:38,636 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 12:35:38,773 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 12:35:38,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:38,792 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 12:35:38,803 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:38,803 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 12:35:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:38,937 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 12:35:38,949 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:38,950 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 12:35:38,998 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 12:35:38,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:39,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:39,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946705426] [2023-12-02 12:35:39,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946705426] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:39,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1352113166] [2023-12-02 12:35:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:39,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:39,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:39,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-12-02 12:35:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:39,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:35:39,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:39,450 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 12:35:39,459 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 12:35:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:39,561 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 12:35:39,574 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:39,575 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 12:35:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:39,682 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 12:35:39,697 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:39,698 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 12:35:39,721 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 12:35:39,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:39,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1352113166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:39,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979178012] [2023-12-02 12:35:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:39,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:39,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:39,958 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:39,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 12:35:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:40,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:35:40,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:40,049 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 12:35:40,055 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 12:35:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:40,159 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 12:35:40,170 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:40,170 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 12:35:40,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:35:40,250 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 12:35:40,261 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:35:40,261 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 12:35:40,284 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 12:35:40,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:40,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979178012] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:35:40,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:35:40,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2023-12-02 12:35:40,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345855286] [2023-12-02 12:35:40,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:40,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:35:40,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:35:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2023-12-02 12:35:40,543 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 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 12:35:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:41,132 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2023-12-02 12:35:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:35:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 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 12:35:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:41,134 INFO L225 Difference]: With dead ends: 108 [2023-12-02 12:35:41,134 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 12:35:41,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=312, Unknown=1, NotChecked=36, Total=420 [2023-12-02 12:35:41,135 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:41,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 158 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 268 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2023-12-02 12:35:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 12:35:41,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2023-12-02 12:35:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.44) internal successors, (108), 79 states have internal predecessors, (108), 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 12:35:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2023-12-02 12:35:41,143 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 26 [2023-12-02 12:35:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:41,143 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2023-12-02 12:35:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 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 12:35:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2023-12-02 12:35:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:35:41,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:41,145 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:41,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 12:35:41,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:41,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2023-12-02 12:35:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:41,746 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 12:35:41,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash 764436572, now seen corresponding path program 1 times [2023-12-02 12:35:41,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094326139] [2023-12-02 12:35:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:41,747 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 12:35:41,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:41,747 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:41,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:41,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:35:41,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:41,950 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 12:35:41,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:42,387 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 12:35:42,597 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 12:35:42,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094326139] [2023-12-02 12:35:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094326139] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711435557] [2023-12-02 12:35:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:42,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:42,598 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:42,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 12:35:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:42,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:35:42,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:42,781 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 12:35:42,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:46,465 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 12:35:46,511 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 12:35:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711435557] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628616722] [2023-12-02 12:35:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:46,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:46,513 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:46,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 12:35:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:46,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:35:46,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:46,666 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 12:35:46,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:54,932 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 12:35:54,973 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 12:35:54,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628616722] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:54,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:35:54,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 15 [2023-12-02 12:35:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038624375] [2023-12-02 12:35:54,974 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:54,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:35:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:35:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=196, Unknown=5, NotChecked=0, Total=240 [2023-12-02 12:35:54,975 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 12:35:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:57,965 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2023-12-02 12:35:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:35:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 27 [2023-12-02 12:35:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:57,967 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:35:57,967 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:35:57,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=83, Invalid=374, Unknown=5, NotChecked=0, Total=462 [2023-12-02 12:35:57,968 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:57,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 224 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 12:35:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:35:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 92. [2023-12-02 12:35:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 77 states have internal predecessors, (103), 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 12:35:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-12-02 12:35:57,976 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 27 [2023-12-02 12:35:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:57,976 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-12-02 12:35:57,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 12:35:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-12-02 12:35:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 12:35:57,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:57,978 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 12:35:57,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 12:35:58,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 12:35:58,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:58,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:58,579 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 12:35:58,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:58,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2072270054, now seen corresponding path program 1 times [2023-12-02 12:35:58,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:58,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692563056] [2023-12-02 12:35:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:58,580 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 12:35:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:58,581 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:58,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:35:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:58,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:35:58,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:58,733 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 12:35:58,884 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 12:35:58,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:59,044 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 12:35:59,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692563056] [2023-12-02 12:35:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692563056] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798079584] [2023-12-02 12:35:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:59,044 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:59,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:59,045 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:59,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 12:35:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:59,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:35:59,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:59,204 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 12:35:59,282 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 12:35:59,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:59,335 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 12:35:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1798079584] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:59,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847854100] [2023-12-02 12:35:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:59,337 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:35:59,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 12:35:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:59,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:35:59,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:59,442 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 12:35:59,529 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 12:35:59,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:59,576 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 12:35:59,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847854100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:59,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:35:59,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 10, 7, 10, 7] total 14 [2023-12-02 12:35:59,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842922991] [2023-12-02 12:35:59,576 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:35:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:35:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:35:59,578 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 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 12:36:02,170 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 12:36:04,319 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 12:36:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:04,816 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2023-12-02 12:36:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 12:36:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 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 28 [2023-12-02 12:36:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:04,818 INFO L225 Difference]: With dead ends: 152 [2023-12-02 12:36:04,818 INFO L226 Difference]: Without dead ends: 152 [2023-12-02 12:36:04,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 12:36:04,820 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 215 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:04,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 139 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 367 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 12:36:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-02 12:36:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2023-12-02 12:36:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 84 states have internal predecessors, (110), 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 12:36:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 133 transitions. [2023-12-02 12:36:04,827 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 133 transitions. Word has length 28 [2023-12-02 12:36:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:04,827 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 133 transitions. [2023-12-02 12:36:04,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 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 12:36:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 133 transitions. [2023-12-02 12:36:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:36:04,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:04,828 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 12:36:04,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:05,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:36:05,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 12:36:05,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:05,429 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 12:36:05,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash 184137851, now seen corresponding path program 1 times [2023-12-02 12:36:05,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:05,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747829870] [2023-12-02 12:36:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:05,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:36:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:05,431 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:05,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:05,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:36:05,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:05,895 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 12:36:06,386 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 12:36:06,473 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 12:36:06,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:06,791 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 12:36:06,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747829870] [2023-12-02 12:36:06,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747829870] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887431886] [2023-12-02 12:36:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:06,791 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:06,792 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:06,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-12-02 12:36:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:06,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:36:06,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:07,100 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 12:36:07,413 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 12:36:07,419 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 12:36:07,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:07,485 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 12:36:07,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887431886] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:07,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341524791] [2023-12-02 12:36:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:07,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:07,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:07,487 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:07,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 12:36:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:07,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:36:07,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:07,615 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 12:36:07,811 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 12:36:07,815 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 12:36:07,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:07,879 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 12:36:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341524791] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:07,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:07,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 11, 7, 11, 7] total 27 [2023-12-02 12:36:07,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789935462] [2023-12-02 12:36:07,880 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:07,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 12:36:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:07,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 12:36:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-12-02 12:36:07,882 INFO L87 Difference]: Start difference. First operand 100 states and 133 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 23 states have internal predecessors, (59), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 12:36:09,923 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 12:36:11,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:36:15,632 WARN L539 Checker$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 12:36:17,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:36:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:18,142 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2023-12-02 12:36:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:36:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 23 states have internal predecessors, (59), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 29 [2023-12-02 12:36:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:18,144 INFO L225 Difference]: With dead ends: 123 [2023-12-02 12:36:18,144 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 12:36:18,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 12:36:18,146 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 245 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:18,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 140 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 430 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2023-12-02 12:36:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 12:36:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2023-12-02 12:36:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 91 states have internal predecessors, (117), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2023-12-02 12:36:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2023-12-02 12:36:18,152 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 29 [2023-12-02 12:36:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:18,152 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2023-12-02 12:36:18,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 23 states have internal predecessors, (59), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 12:36:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2023-12-02 12:36:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 12:36:18,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:18,154 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 12:36:18,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-12-02 12:36:18,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:18,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:18,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:18,755 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 12:36:18,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1413306172, now seen corresponding path program 1 times [2023-12-02 12:36:18,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:18,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486835105] [2023-12-02 12:36:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:18,755 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 12:36:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:18,756 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:18,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:18,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:36:18,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:18,854 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 12:36:18,928 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 12:36:18,964 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 12:36:19,045 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 12:36:19,069 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 12:36:19,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:19,407 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 12:36:19,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486835105] [2023-12-02 12:36:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486835105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [121714813] [2023-12-02 12:36:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:19,407 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:19,408 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:19,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 12:36:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:19,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:36:19,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:19,550 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 12:36:19,592 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 12:36:19,608 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 12:36:19,663 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 12:36:19,669 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 12:36:19,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:21,880 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 12:36:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [121714813] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106960755] [2023-12-02 12:36:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:21,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:21,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:21,882 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:21,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 12:36:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:21,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:36:21,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:21,994 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 12:36:22,052 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 12:36:22,068 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 12:36:22,122 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 12:36:22,130 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 12:36:22,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:26,358 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 12:36:26,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106960755] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:26,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:26,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11, 8, 11, 8] total 18 [2023-12-02 12:36:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466491616] [2023-12-02 12:36:26,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:26,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:36:26,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:36:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=292, Unknown=3, NotChecked=0, Total=342 [2023-12-02 12:36:26,360 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 19 states, 18 states have (on average 2.5) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:36:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:28,358 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2023-12-02 12:36:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:36:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 30 [2023-12-02 12:36:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:28,360 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:36:28,360 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:36:28,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=108, Invalid=701, Unknown=3, NotChecked=0, Total=812 [2023-12-02 12:36:28,361 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 38 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:28,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 296 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 12:36:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:36:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2023-12-02 12:36:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 105 states have (on average 1.361904761904762) internal successors, (143), 111 states have internal predecessors, (143), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2023-12-02 12:36:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 172 transitions. [2023-12-02 12:36:28,367 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 172 transitions. Word has length 30 [2023-12-02 12:36:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:28,367 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 172 transitions. [2023-12-02 12:36:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:36:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 172 transitions. [2023-12-02 12:36:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 12:36:28,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:28,368 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 12:36:28,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 12:36:28,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:28,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 12:36:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:28,969 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 12:36:28,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:28,969 INFO L85 PathProgramCache]: Analyzing trace with hash 568834301, now seen corresponding path program 2 times [2023-12-02 12:36:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15975680] [2023-12-02 12:36:28,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:36:28,970 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 12:36:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:28,971 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:28,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:29,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:36:29,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:36:29,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:36:29,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:29,071 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 12:36:29,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:36:29,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:29,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15975680] [2023-12-02 12:36:29,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15975680] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:36:29,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:36:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:36:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547876706] [2023-12-02 12:36:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:36:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:36:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:36:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:36:29,073 INFO L87 Difference]: Start difference. First operand 130 states and 172 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 12:36:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:29,114 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2023-12-02 12:36:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:36:29,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 30 [2023-12-02 12:36:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:29,116 INFO L225 Difference]: With dead ends: 92 [2023-12-02 12:36:29,116 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 12:36:29,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 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 12:36:29,117 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:29,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 106 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:36:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 12:36:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2023-12-02 12:36:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.328125) internal successors, (85), 72 states have internal predecessors, (85), 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 12:36:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2023-12-02 12:36:29,121 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 30 [2023-12-02 12:36:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:29,121 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2023-12-02 12:36:29,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 12:36:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2023-12-02 12:36:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:36:29,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:29,122 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] [2023-12-02 12:36:29,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:29,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:29,323 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:36:29,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 977593241, now seen corresponding path program 1 times [2023-12-02 12:36:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327026208] [2023-12-02 12:36:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:29,324 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 12:36:29,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:29,325 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:29,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:29,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:36:29,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:29,458 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 12:36:29,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:29,590 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 12:36:29,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327026208] [2023-12-02 12:36:29,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327026208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906040841] [2023-12-02 12:36:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:29,591 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:29,592 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:29,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 12:36:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:29,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:36:29,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:29,736 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 12:36:29,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:29,790 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 12:36:29,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1906040841] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:29,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886098138] [2023-12-02 12:36:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:29,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:29,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:29,792 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 12:36:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:29,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 12:36:29,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:29,877 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 12:36:30,045 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:30,046 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 12:36:30,140 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 12:36:32,205 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_53| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_53|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_53|))) is different from true [2023-12-02 12:36:32,338 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 12:36:32,395 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 12:36:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 12:36:32,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:32,534 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 12:36:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:36:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886098138] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:33,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 13, 11] total 29 [2023-12-02 12:36:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101919162] [2023-12-02 12:36:33,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:33,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 12:36:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 12:36:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=676, Unknown=1, NotChecked=52, Total=812 [2023-12-02 12:36:33,074 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 25 states have internal predecessors, (75), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 12:36:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:37,417 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2023-12-02 12:36:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 12:36:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 25 states have internal predecessors, (75), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 32 [2023-12-02 12:36:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:37,419 INFO L225 Difference]: With dead ends: 96 [2023-12-02 12:36:37,419 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 12:36:37,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=268, Invalid=2086, Unknown=2, NotChecked=94, Total=2450 [2023-12-02 12:36:37,420 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:37,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 235 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 719 Invalid, 0 Unknown, 84 Unchecked, 1.1s Time] [2023-12-02 12:36:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 12:36:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2023-12-02 12:36:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 73 states have internal predecessors, (83), 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 12:36:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-12-02 12:36:37,424 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 32 [2023-12-02 12:36:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:37,424 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-12-02 12:36:37,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 25 states have internal predecessors, (75), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 12:36:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-12-02 12:36:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:36:37,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:37,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 12:36:37,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:36:37,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2023-12-02 12:36:37,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:38,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:38,026 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 12:36:38,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1725665649, now seen corresponding path program 2 times [2023-12-02 12:36:38,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:38,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814834803] [2023-12-02 12:36:38,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:36:38,026 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 12:36:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:38,027 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:38,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:38,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:36:38,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:36:38,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:36:38,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:38,137 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 12:36:38,144 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 12:36:38,304 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 12:36:38,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:38,320 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 12:36:38,331 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:38,331 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 12:36:38,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:38,465 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 12:36:38,481 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:38,481 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 12:36:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:38,615 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 12:36:38,627 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:38,628 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 12:36:38,682 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 12:36:38,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:41,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:41,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814834803] [2023-12-02 12:36:41,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814834803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:36:41,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372035058] [2023-12-02 12:36:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:36:41,101 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:41,102 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:41,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 12:36:41,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:36:41,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:36:41,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:36:41,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:41,291 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 12:36:41,303 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 12:36:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:41,431 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 12:36:41,448 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:41,449 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 12:36:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:41,562 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 12:36:41,575 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:41,575 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 12:36:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:41,673 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 12:36:41,694 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:41,695 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 12:36:41,723 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 12:36:41,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372035058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:36:42,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041768897] [2023-12-02 12:36:42,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:36:42,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:42,119 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:42,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 12:36:42,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:36:42,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:36:42,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 12:36:42,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:42,232 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 12:36:42,241 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 12:36:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:42,360 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 12:36:42,375 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:42,376 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 12:36:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:42,485 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 12:36:42,500 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:42,501 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 12:36:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:36:42,607 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 12:36:42,619 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:36:42,620 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 12:36:42,647 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 12:36:42,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041768897] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:36:44,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:36:44,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2023-12-02 12:36:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419224872] [2023-12-02 12:36:44,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:44,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 12:36:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 12:36:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=171, Unknown=2, NotChecked=26, Total=240 [2023-12-02 12:36:44,961 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 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 12:36:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:45,851 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2023-12-02 12:36:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:36:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 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 12:36:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:45,852 INFO L225 Difference]: With dead ends: 118 [2023-12-02 12:36:45,852 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 12:36:45,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=92, Invalid=462, Unknown=2, NotChecked=44, Total=600 [2023-12-02 12:36:45,853 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:45,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 241 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 391 Invalid, 0 Unknown, 92 Unchecked, 0.6s Time] [2023-12-02 12:36:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 12:36:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2023-12-02 12:36:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.325) internal successors, (106), 87 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 12:36:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-12-02 12:36:45,856 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 35 [2023-12-02 12:36:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:45,856 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-12-02 12:36:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 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 12:36:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-12-02 12:36:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 12:36:45,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:45,857 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] [2023-12-02 12:36:45,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:46,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:46,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2023-12-02 12:36:46,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:46,457 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:36:46,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash -50196627, now seen corresponding path program 1 times [2023-12-02 12:36:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:46,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065168963] [2023-12-02 12:36:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:46,458 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 12:36:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:46,459 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:46,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:36:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:46,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:36:46,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:47,072 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 12:36:47,272 INFO L349 Elim1Store]: treesize reduction 61, result has 33.0 percent of original size [2023-12-02 12:36:47,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 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 12:36:47,327 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-12-02 12:36:47,328 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 1 case distinctions, treesize of input 39 treesize of output 11 [2023-12-02 12:36:47,333 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 5 treesize of output 3 [2023-12-02 12:36:47,647 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 12:37:02,861 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 12:37:02,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:37:03,459 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 24 treesize of output 22 [2023-12-02 12:37:04,178 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_131| (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_131| (_ bv0 1)) (_ bv0 32) (_ bv0 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_131|))))) (not (= |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32)))) (forall ((|v_ULTIMATE.start_entry_point_#t~ret44#1.base_131| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_131| (_ bv0 1)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret44#1.base_131|))) (not (= (bvadd (select .cse0 |c_ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv1 1)) (_ bv0 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store .cse0 |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))))))) is different from false [2023-12-02 12:37:04,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:37:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065168963] [2023-12-02 12:37:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065168963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:37:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185629069] [2023-12-02 12:37:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:04,181 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:37:04,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:37:04,182 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:37:04,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2023-12-02 12:37:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:04,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:37:04,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:37:07,476 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 12:37:07,832 INFO L349 Elim1Store]: treesize reduction 134, result has 25.1 percent of original size [2023-12-02 12:37:07,832 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 12:37:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:37:07,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:37:07,896 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 105 treesize of output 99 [2023-12-02 12:37:08,407 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 12:37:09,616 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_12 (_ BitVec 1)) (|v_ULTIMATE.start_entry_point_#t~mem46#1.base_37| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_37| v_DerPreprocessor_12) |ULTIMATE.start_entry_point_~array~0#1.base|)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_37|) (_ bv0 1)) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_#t~mem46#1.base_37| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (not (= |v_ULTIMATE.start_entry_point_#t~mem46#1.base_37| |ULTIMATE.start_entry_point_~array~0#1.base|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2023-12-02 12:37:09,645 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 12:37:09,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:37:10,503 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 12:37:25,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [185629069] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:37:25,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473382937] [2023-12-02 12:37:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:25,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:37:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:37:25,512 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:37:25,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 12:37:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:25,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 12:37:25,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:37:26,610 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 15 treesize of output 1 [2023-12-02 12:37:26,980 INFO L349 Elim1Store]: treesize reduction 61, result has 33.0 percent of original size [2023-12-02 12:37:26,980 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 12:37:27,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:37:27,035 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 42 treesize of output 48 [2023-12-02 12:37:27,456 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 12:37:41,637 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 12:37:41,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473382937] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:00,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:38:00,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 36 [2023-12-02 12:38:00,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144399271] [2023-12-02 12:38:00,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:00,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 12:38:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 12:38:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3437, Unknown=40, NotChecked=242, Total=4032 [2023-12-02 12:38:00,560 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 38 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 12:38:04,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:38:06,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:38:09,189 WARN L539 Checker$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 12:38:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:13,206 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-12-02 12:38:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:38:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 36 [2023-12-02 12:38:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:13,207 INFO L225 Difference]: With dead ends: 105 [2023-12-02 12:38:13,207 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 12:38:13,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 73.6s TimeCoverageRelationStatistics Valid=427, Invalid=4096, Unknown=41, NotChecked=266, Total=4830 [2023-12-02 12:38:13,210 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 9 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:13,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 231 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 645 Invalid, 31 Unknown, 58 Unchecked, 8.2s Time] [2023-12-02 12:38:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 12:38:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-02 12:38:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.352112676056338) internal successors, (96), 78 states have internal predecessors, (96), 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 12:38:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2023-12-02 12:38:13,214 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 36 [2023-12-02 12:38:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:13,214 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2023-12-02 12:38:13,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 12:38:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2023-12-02 12:38:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 12:38:13,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:13,215 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] [2023-12-02 12:38:13,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:13,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:13,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:13,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:13,816 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 12:38:13,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1812858979, now seen corresponding path program 1 times [2023-12-02 12:38:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837791659] [2023-12-02 12:38:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:13,817 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 12:38:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:13,818 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:13,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:13,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:38:13,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:13,937 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 12:38:13,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:14,040 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 12:38:14,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837791659] [2023-12-02 12:38:14,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837791659] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:14,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260444065] [2023-12-02 12:38:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:38:14,042 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:38:14,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2023-12-02 12:38:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:14,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:38:14,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:14,235 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 12:38:14,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:14,286 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 12:38:14,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260444065] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:14,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834804896] [2023-12-02 12:38:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:14,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:14,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:14,287 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:14,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 12:38:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:14,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:38:14,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:14,414 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 12:38:14,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:14,466 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 12:38:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834804896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:14,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:38:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2023-12-02 12:38:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954906672] [2023-12-02 12:38:14,467 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:38:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:38:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:38:14,469 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 12:38:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:14,750 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-12-02 12:38:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:38:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 40 [2023-12-02 12:38:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:14,752 INFO L225 Difference]: With dead ends: 99 [2023-12-02 12:38:14,752 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 12:38:14,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:38:14,753 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:14,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 158 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:38:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 12:38:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2023-12-02 12:38:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 77 states have internal predecessors, (92), 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 12:38:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2023-12-02 12:38:14,756 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 40 [2023-12-02 12:38:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:14,757 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2023-12-02 12:38:14,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 12:38:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2023-12-02 12:38:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 12:38:14,757 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:14,757 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] [2023-12-02 12:38:14,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2023-12-02 12:38:14,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 12:38:15,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:15,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:15,358 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:38:15,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash 969135340, now seen corresponding path program 1 times [2023-12-02 12:38:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041811012] [2023-12-02 12:38:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:15,359 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 12:38:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:15,360 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:15,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:15,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:38:15,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:15,664 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 12:38:15,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:15,877 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 12:38:16,800 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 12:38:16,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041811012] [2023-12-02 12:38:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041811012] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690642127] [2023-12-02 12:38:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:16,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:38:16,802 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:38:16,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2023-12-02 12:38:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:16,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:38:16,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:17,108 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 12:38:17,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:17,184 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 12:38:17,486 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 12:38:17,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690642127] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001867169] [2023-12-02 12:38:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:17,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:17,487 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:17,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 12:38:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:17,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:38:17,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:17,720 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 12:38:17,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:17,803 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 12:38:18,118 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 12:38:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001867169] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:18,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:38:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2023-12-02 12:38:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952477861] [2023-12-02 12:38:18,119 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 12:38:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 12:38:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:38:18,120 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 12:38:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:22,617 INFO L93 Difference]: Finished difference Result 177 states and 193 transitions. [2023-12-02 12:38:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 12:38:22,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2023-12-02 12:38:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:22,620 INFO L225 Difference]: With dead ends: 177 [2023-12-02 12:38:22,620 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 12:38:22,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 12:38:22,621 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 275 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:22,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 366 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 12:38:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 12:38:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 89. [2023-12-02 12:38:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 77 states have internal predecessors, (90), 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 12:38:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2023-12-02 12:38:22,625 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 41 [2023-12-02 12:38:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:22,625 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2023-12-02 12:38:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 12:38:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2023-12-02 12:38:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:38:22,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:22,626 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] [2023-12-02 12:38:22,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 12:38:22,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2023-12-02 12:38:23,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:23,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:23,227 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:38:23,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash -21575542, now seen corresponding path program 1 times [2023-12-02 12:38:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:23,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260492353] [2023-12-02 12:38:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:23,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:38:23,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:23,228 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:23,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:23,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:38:23,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:23,432 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 12:38:23,562 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 12:38:23,797 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 12:38:23,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:24,171 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 12:38:24,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:24,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260492353] [2023-12-02 12:38:24,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260492353] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845629272] [2023-12-02 12:38:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:24,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:24,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:38:24,173 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:38:24,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2023-12-02 12:38:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:24,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:38:24,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:24,443 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 12:38:24,550 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 12:38:24,714 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 12:38:24,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:24,831 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 12:38:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845629272] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748982751] [2023-12-02 12:38:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:24,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:24,832 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:24,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-02 12:38:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:24,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 12:38:24,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:24,999 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 12:38:25,101 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 12:38:25,254 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 12:38:25,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:25,396 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 12:38:25,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748982751] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:25,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:38:25,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 12, 9] total 18 [2023-12-02 12:38:25,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622091347] [2023-12-02 12:38:25,397 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:25,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:38:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:38:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:38:25,398 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 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 12:38:28,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:38:30,363 WARN L539 Checker$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 12:38:32,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:38:34,330 WARN L539 Checker$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 12:38:36,788 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 12:38:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:36,876 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2023-12-02 12:38:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 12:38:36,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 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 42 [2023-12-02 12:38:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:36,879 INFO L225 Difference]: With dead ends: 158 [2023-12-02 12:38:36,879 INFO L226 Difference]: Without dead ends: 158 [2023-12-02 12:38:36,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=343, Invalid=1819, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 12:38:36,880 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 474 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:36,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 192 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 534 Invalid, 3 Unknown, 0 Unchecked, 9.8s Time] [2023-12-02 12:38:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-02 12:38:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 91. [2023-12-02 12:38:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 79 states have internal predecessors, (92), 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 12:38:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2023-12-02 12:38:36,884 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 42 [2023-12-02 12:38:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:36,885 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2023-12-02 12:38:36,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 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 12:38:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2023-12-02 12:38:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:38:36,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:36,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:36,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:37,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:37,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:37,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:37,486 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 12:38:37,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash -291953667, now seen corresponding path program 3 times [2023-12-02 12:38:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:37,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113323013] [2023-12-02 12:38:37,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:38:37,487 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 12:38:37,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:37,488 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:37,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:37,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:38:37,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:38:37,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 12:38:37,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:37,645 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 12:38:37,652 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 12:38:37,801 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 12:38:37,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:37,821 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 12:38:37,831 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:37,832 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 12:38:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:37,951 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 12:38:37,962 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:37,963 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 12:38:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:38,099 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 12:38:38,109 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:38,110 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 12:38:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:38,243 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 12:38:38,254 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:38,254 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 12:38:38,300 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 12:38:38,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:38,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:38,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113323013] [2023-12-02 12:38:38,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113323013] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:38,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151449755] [2023-12-02 12:38:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:38:38,824 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:38,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:38:38,825 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:38:38,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2023-12-02 12:38:39,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:38:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:38:39,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 12:38:39,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:39,085 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 12:38:39,091 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 5 [2023-12-02 12:38:39,244 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:39,244 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 12:38:39,255 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 12:38:39,393 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:39,393 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 12:38:39,401 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 12:38:39,560 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:38:39,560 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 12:38:39,581 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:39,582 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 12:38:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:39,704 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 12:38:39,714 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:39,714 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 12:38:39,740 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 12:38:39,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151449755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:40,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528539119] [2023-12-02 12:38:40,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:38:40,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:40,119 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:40,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-12-02 12:38:40,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:38:40,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:38:40,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 12:38:40,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:40,316 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 12:38:40,323 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 12:38:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:40,421 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 12:38:40,433 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:40,433 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 12:38:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:40,517 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 12:38:40,531 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:40,531 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 12:38:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:40,629 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 12:38:40,641 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:40,641 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 12:38:40,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:40,736 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 12:38:40,751 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:38:40,751 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 12:38:40,773 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 12:38:40,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:43,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528539119] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:43,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:38:43,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 15] total 19 [2023-12-02 12:38:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845240404] [2023-12-02 12:38:43,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:43,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 12:38:43,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 12:38:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=360, Unknown=1, NotChecked=38, Total=462 [2023-12-02 12:38:43,168 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 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 12:38:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:44,718 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2023-12-02 12:38:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 12:38:44,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 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 12:38:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:44,720 INFO L225 Difference]: With dead ends: 132 [2023-12-02 12:38:44,720 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 12:38:44,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=149, Invalid=1044, Unknown=1, NotChecked=66, Total=1260 [2023-12-02 12:38:44,721 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 331 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 658 Invalid, 0 Unknown, 102 Unchecked, 1.0s Time] [2023-12-02 12:38:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 12:38:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2023-12-02 12:38:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.25) internal successors, (105), 90 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:38:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2023-12-02 12:38:44,725 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 44 [2023-12-02 12:38:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:44,725 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2023-12-02 12:38:44,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 15 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 12:38:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2023-12-02 12:38:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 12:38:44,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:44,729 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] [2023-12-02 12:38:44,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:44,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2023-12-02 12:38:45,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:45,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:45,330 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:38:45,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash -668841717, now seen corresponding path program 1 times [2023-12-02 12:38:45,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:38:45,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780979611] [2023-12-02 12:38:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:45,332 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 12:38:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:38:45,333 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:45,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:38:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:45,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:38:45,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:45,587 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 12:38:45,769 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 12:38:46,135 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 12:38:46,174 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 12:38:46,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:46,677 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 12:38:46,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:38:46,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780979611] [2023-12-02 12:38:46,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780979611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:46,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [274850620] [2023-12-02 12:38:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:46,678 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:38:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:38:46,678 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:38:46,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2023-12-02 12:38:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:46,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:38:46,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:46,956 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 12:38:47,082 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 12:38:47,282 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 12:38:47,288 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 12:38:47,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:47,442 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 12:38:47,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [274850620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:47,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494697862] [2023-12-02 12:38:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:47,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:47,443 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:47,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-12-02 12:38:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:47,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:38:47,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:47,635 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 12:38:47,756 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 12:38:47,954 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 12:38:47,960 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 12:38:47,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:48,106 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 12:38:48,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494697862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:38:48,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:38:48,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13, 9, 13, 9] total 19 [2023-12-02 12:38:48,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120367436] [2023-12-02 12:38:48,107 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 12:38:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:38:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 12:38:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:38:48,108 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 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 12:38:50,163 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 12:38:54,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:38:56,374 WARN L539 Checker$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 12:38:59,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:01,590 WARN L539 Checker$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 12:39:04,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:39:06,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:39:08,511 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 12:39:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:08,511 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2023-12-02 12:39:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 12:39:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 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 43 [2023-12-02 12:39:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:08,522 INFO L225 Difference]: With dead ends: 152 [2023-12-02 12:39:08,522 INFO L226 Difference]: Without dead ends: 152 [2023-12-02 12:39:08,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 227 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=341, Invalid=1729, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 12:39:08,524 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 18 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:08,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 218 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 733 Invalid, 8 Unknown, 0 Unchecked, 17.9s Time] [2023-12-02 12:39:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-02 12:39:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 112. [2023-12-02 12:39:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 97 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:39:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2023-12-02 12:39:08,527 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 43 [2023-12-02 12:39:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:08,528 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2023-12-02 12:39:08,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 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 12:39:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2023-12-02 12:39:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:39:08,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:08,529 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] [2023-12-02 12:39:08,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:08,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:08,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2023-12-02 12:39:09,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:39:09,130 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:39:09,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:09,130 INFO L85 PathProgramCache]: Analyzing trace with hash 740743340, now seen corresponding path program 1 times [2023-12-02 12:39:09,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:39:09,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531506726] [2023-12-02 12:39:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:09,130 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 12:39:09,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:39:09,131 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:09,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:09,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:39:09,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:09,296 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 12:39:09,398 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 12:39:09,443 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 12:39:09,533 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:39:09,534 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 12:39:09,679 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 12:39:09,761 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 12:39:10,098 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 12:39:10,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:10,179 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 12:39:10,227 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 12:39:10,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:10,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:39:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531506726] [2023-12-02 12:39:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531506726] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850388042] [2023-12-02 12:39:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:10,903 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:39:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:39:10,904 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:39:10,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2023-12-02 12:39:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:11,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:39:11,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:11,186 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 12:39:11,230 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 12:39:11,250 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 12:39:11,301 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:39:11,301 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 12:39:11,357 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 12:39:11,394 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 12:39:11,642 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 12:39:11,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:11,677 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 12:39:11,686 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 12:39:11,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:11,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1850388042] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:11,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584965379] [2023-12-02 12:39:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:11,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:11,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:11,935 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:11,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-12-02 12:39:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:12,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:39:12,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:12,080 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 12:39:12,124 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 12:39:12,145 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 12:39:12,194 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:39:12,195 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 12:39:12,258 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 12:39:12,293 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 12:39:12,552 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 12:39:12,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:12,589 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 12:39:12,598 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 12:39:12,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:12,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584965379] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:12,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:39:12,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2023-12-02 12:39:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750719366] [2023-12-02 12:39:12,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:12,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:39:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:39:12,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:39:12,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:39:12,848 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 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 12:39:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:14,145 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2023-12-02 12:39:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 12:39:14,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 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 44 [2023-12-02 12:39:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:14,147 INFO L225 Difference]: With dead ends: 116 [2023-12-02 12:39:14,147 INFO L226 Difference]: Without dead ends: 116 [2023-12-02 12:39:14,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-12-02 12:39:14,148 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:14,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 272 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 12:39:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-02 12:39:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-12-02 12:39:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 101 states have internal predecessors, (116), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-02 12:39:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2023-12-02 12:39:14,154 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 44 [2023-12-02 12:39:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:14,154 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2023-12-02 12:39:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 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 12:39:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2023-12-02 12:39:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 12:39:14,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:14,155 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:39:14,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2023-12-02 12:39:14,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-12-02 12:39:14,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:14,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:14,756 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:39:14,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash -281526388, now seen corresponding path program 2 times [2023-12-02 12:39:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:39:14,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755648991] [2023-12-02 12:39:14,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:14,757 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 12:39:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:39:14,758 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:14,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:14,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:14,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:14,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:39:14,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:39:15,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:39:15,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:39:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755648991] [2023-12-02 12:39:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755648991] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [46710581] [2023-12-02 12:39:15,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:15,423 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:39:15,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:39:15,424 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:39:15,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2023-12-02 12:39:15,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:15,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:15,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:39:15,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:39:15,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:39:15,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [46710581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950803985] [2023-12-02 12:39:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:15,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:15,848 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:15,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-12-02 12:39:15,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:15,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:15,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:39:15,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:39:16,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:39:16,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950803985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:16,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:39:16,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2023-12-02 12:39:16,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359378498] [2023-12-02 12:39:16,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:16,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 12:39:16,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:39:16,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 12:39:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:39:16,161 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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 12:39:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:16,680 INFO L93 Difference]: Finished difference Result 324 states and 360 transitions. [2023-12-02 12:39:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:39:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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 12:39:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:16,683 INFO L225 Difference]: With dead ends: 324 [2023-12-02 12:39:16,683 INFO L226 Difference]: Without dead ends: 324 [2023-12-02 12:39:16,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:39:16,684 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 564 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:16,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 459 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:39:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-02 12:39:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 142. [2023-12-02 12:39:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 122 states have internal predecessors, (142), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2023-12-02 12:39:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2023-12-02 12:39:16,689 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 47 [2023-12-02 12:39:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:16,689 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2023-12-02 12:39:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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 12:39:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2023-12-02 12:39:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 12:39:16,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:16,690 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] [2023-12-02 12:39:16,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:16,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:17,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-12-02 12:39:17,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:17,293 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 12:39:17,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:17,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1110193911, now seen corresponding path program 2 times [2023-12-02 12:39:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:39:17,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958136949] [2023-12-02 12:39:17,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:17,295 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 12:39:17,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:39:17,298 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:17,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:17,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:17,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:17,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:39:17,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:17,486 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 12:39:17,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:17,702 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 12:39:17,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:39:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958136949] [2023-12-02 12:39:17,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958136949] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205410719] [2023-12-02 12:39:17,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:39:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:39:17,704 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:39:17,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2023-12-02 12:39:17,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:17,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:17,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:39:17,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:17,932 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 12:39:17,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:18,009 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 12:39:18,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205410719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:18,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014191518] [2023-12-02 12:39:18,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:18,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:18,010 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:18,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-12-02 12:39:18,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:18,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:18,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:39:18,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:18,167 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 12:39:18,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:18,551 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 12:39:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014191518] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:18,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:39:18,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 19 [2023-12-02 12:39:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791311359] [2023-12-02 12:39:18,552 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:18,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:39:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:39:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:39:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:39:18,553 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 12:39:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:18,846 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2023-12-02 12:39:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:39:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 46 [2023-12-02 12:39:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:18,848 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:39:18,848 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:39:18,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 253 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 12:39:18,849 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:18,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 326 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:39:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:39:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2023-12-02 12:39:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 123 states have internal predecessors, (143), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2023-12-02 12:39:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2023-12-02 12:39:18,855 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 46 [2023-12-02 12:39:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:18,855 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2023-12-02 12:39:18,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 12:39:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2023-12-02 12:39:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 12:39:18,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:18,856 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] [2023-12-02 12:39:18,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:19,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2023-12-02 12:39:19,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-12-02 12:39:19,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:19,458 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 12:39:19,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1744503078, now seen corresponding path program 1 times [2023-12-02 12:39:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:39:19,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910907809] [2023-12-02 12:39:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:19,462 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 12:39:19,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:39:19,463 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:19,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:19,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 12:39:19,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:19,598 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 12:39:19,697 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:39:19,697 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 12:39:19,764 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 12:39:21,809 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_117| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_117|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_117|))) is different from true [2023-12-02 12:39:21,882 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 12:39:23,934 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_118| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_118| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_118|) (_ bv0 32))))) is different from true [2023-12-02 12:39:24,067 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 8 treesize of output 1 [2023-12-02 12:39:24,115 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 12:39:24,159 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 12:39:24,197 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 12:39:24,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:24,362 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 24 treesize of output 22 [2023-12-02 12:39:24,887 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 12:39:24,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:39:24,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910907809] [2023-12-02 12:39:24,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910907809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:24,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1045853153] [2023-12-02 12:39:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:24,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:39:24,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:39:24,889 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:39:24,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2023-12-02 12:39:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:25,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 12:39:25,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:25,137 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 12:39:25,195 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:39:25,195 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 12:39:25,223 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 12:39:27,250 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_123| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_123|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_123|))) is different from true [2023-12-02 12:39:27,335 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 12:39:29,355 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_124| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_124| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_124|) (_ bv0 32))))) is different from true [2023-12-02 12:39:29,500 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 12:39:29,526 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 12:39:29,536 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 12:39:29,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:29,639 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 12:39:29,934 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 12:39:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1045853153] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:29,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578718722] [2023-12-02 12:39:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:29,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:29,936 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:29,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-12-02 12:39:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:30,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:39:30,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:30,062 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 12:39:30,113 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:39:30,113 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 12:39:30,145 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 12:39:32,163 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_129| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_129|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_129|))) is different from true [2023-12-02 12:39:32,238 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 12:39:34,265 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_130| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_130|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_130|))) is different from true [2023-12-02 12:39:34,403 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 12:39:34,504 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 12:39:34,581 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 12:39:34,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:34,794 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 12:39:36,573 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 12:39:36,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578718722] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:36,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:39:36,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16, 13, 17, 16] total 42 [2023-12-02 12:39:36,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405267979] [2023-12-02 12:39:36,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:36,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 12:39:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:39:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 12:39:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1193, Unknown=6, NotChecked=450, Total=1806 [2023-12-02 12:39:36,576 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 43 states, 42 states have (on average 2.642857142857143) internal successors, (111), 38 states have internal predecessors, (111), 10 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-12-02 12:39:49,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:39:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:53,083 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2023-12-02 12:39:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 12:39:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.642857142857143) internal successors, (111), 38 states have internal predecessors, (111), 10 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 48 [2023-12-02 12:39:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:53,086 INFO L225 Difference]: With dead ends: 163 [2023-12-02 12:39:53,086 INFO L226 Difference]: Without dead ends: 163 [2023-12-02 12:39:53,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 226 SyntacticMatches, 17 SemanticMatches, 74 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=742, Invalid=4104, Unknown=8, NotChecked=846, Total=5700 [2023-12-02 12:39:53,089 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 330 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 636 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:53,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 351 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1020 Invalid, 0 Unknown, 636 Unchecked, 3.6s Time] [2023-12-02 12:39:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-02 12:39:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 149. [2023-12-02 12:39:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.2704918032786885) internal successors, (155), 129 states have internal predecessors, (155), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2023-12-02 12:39:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 185 transitions. [2023-12-02 12:39:53,094 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 185 transitions. Word has length 48 [2023-12-02 12:39:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:53,094 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 185 transitions. [2023-12-02 12:39:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.642857142857143) internal successors, (111), 38 states have internal predecessors, (111), 10 states have call successors, (14), 9 states have call predecessors, (14), 10 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-12-02 12:39:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 185 transitions. [2023-12-02 12:39:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 12:39:53,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:53,095 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] [2023-12-02 12:39:53,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2023-12-02 12:39:53,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:53,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-12-02 12:39:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:53,696 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:39:53,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1430209315, now seen corresponding path program 2 times [2023-12-02 12:39:53,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:39:53,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275562560] [2023-12-02 12:39:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:39:53,697 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 12:39:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:39:53,697 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:53,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:39:53,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:39:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:39:53,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 12:39:53,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:54,118 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 12:39:54,194 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 12:39:54,194 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 12:40:01,652 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2023-12-02 12:40:01,653 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 12:40:02,008 INFO L349 Elim1Store]: treesize reduction 277, result has 18.3 percent of original size [2023-12-02 12:40:02,008 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 381 treesize of output 437 [2023-12-02 12:40:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:40:02,190 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2023-12-02 12:40:02,190 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 141 treesize of output 137 [2023-12-02 12:40:07,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:40:07,470 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 153 treesize of output 77 [2023-12-02 12:40:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:40:11,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:25,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:40:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275562560] [2023-12-02 12:40:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275562560] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [490225872] [2023-12-02 12:40:25,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:40:25,336 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:40:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:40:25,337 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:40:25,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2023-12-02 12:40:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:40:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:40:25,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 12:40:25,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:30,463 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 12:40:30,657 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-12-02 12:40:30,657 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 12:40:34,405 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2023-12-02 12:40:34,405 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 12:40:34,779 INFO L349 Elim1Store]: treesize reduction 285, result has 13.9 percent of original size [2023-12-02 12:40:34,779 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 12:40:34,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:40:34,810 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 12:40:36,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:40:36,437 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 12:40:39,105 WARN L876 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_arrayElimCell_216 (_ BitVec 32)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (and (= (store (store (store |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_216 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ bv0 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)) (= (_ bv0 1) (select (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95| (_ bv1 1)) v_arrayElimCell_216)) (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem46#1.base_95|)))))) is different from true [2023-12-02 12:40:39,124 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 12:40:39,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:40,307 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 12:40:44,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [490225872] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023890346] [2023-12-02 12:40:44,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:40:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:44,480 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:44,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-12-02 12:40:44,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:40:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:40:44,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 12:40:44,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:45,148 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 12:40:45,366 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 12:40:45,366 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 12:40:50,875 INFO L349 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2023-12-02 12:40:50,875 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 12:40:51,233 INFO L349 Elim1Store]: treesize reduction 166, result has 10.3 percent of original size [2023-12-02 12:40:51,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 60 [2023-12-02 12:40:51,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 12:40:52,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:40:52,924 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 12:41:20,462 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 12:41:20,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023890346] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:41:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 50 [2023-12-02 12:41:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854836637] [2023-12-02 12:41:35,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:35,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 12:41:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:41:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 12:41:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=5994, Unknown=36, NotChecked=158, Total=6642 [2023-12-02 12:41:35,231 INFO L87 Difference]: Start difference. First operand 149 states and 185 transitions. Second operand has 52 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 43 states have internal predecessors, (100), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:41:37,296 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 12:41:39,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:41:41,340 WARN L539 Checker$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 12:41:43,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:41:45,406 WARN L539 Checker$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 12:41:47,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:41:49,438 WARN L539 Checker$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 12:41:51,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:41:53,606 WARN L539 Checker$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 12:41:55,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:41:57,663 WARN L539 Checker$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 12:41:59,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:01,714 WARN L539 Checker$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 12:42:03,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:05,754 WARN L539 Checker$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 12:42:07,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:09,808 WARN L539 Checker$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 12:42:11,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:13,862 WARN L539 Checker$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 12:42:16,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:19,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:21,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:26,170 WARN L539 Checker$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 12:42:29,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:34,440 WARN L539 Checker$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 12:42:36,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:38,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:40,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:42:42,481 WARN L539 Checker$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 12:42:44,485 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 12:42:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:45,056 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2023-12-02 12:42:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 12:42:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 43 states have internal predecessors, (100), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2023-12-02 12:42:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:45,058 INFO L225 Difference]: With dead ends: 154 [2023-12-02 12:42:45,058 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 12:42:45,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=597, Invalid=7203, Unknown=36, NotChecked=174, Total=8010 [2023-12-02 12:42:45,062 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 5 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 65.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:45,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 446 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1404 Invalid, 34 Unknown, 76 Unchecked, 65.5s Time] [2023-12-02 12:42:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 12:42:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2023-12-02 12:42:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.3018867924528301) internal successors, (138), 114 states have internal predecessors, (138), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:42:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2023-12-02 12:42:45,067 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 50 [2023-12-02 12:42:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:45,068 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2023-12-02 12:42:45,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 43 states have internal predecessors, (100), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:42:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2023-12-02 12:42:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 12:42:45,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:45,069 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:45,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-12-02 12:42:45,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2023-12-02 12:42:45,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:42:45,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:42:45,670 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:42:45,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1613670991, now seen corresponding path program 4 times [2023-12-02 12:42:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:42:45,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835977883] [2023-12-02 12:42:45,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:42:45,670 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 12:42:45,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:42:45,671 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:42:45,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:42:45,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:42:45,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:45,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 12:42:45,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:45,851 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 12:42:45,858 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 12:42:46,024 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 12:42:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:46,044 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 12:42:46,057 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:46,058 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 12:42:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:46,219 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 12:42:46,232 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:46,232 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 12:42:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:46,386 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 12:42:46,401 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:46,402 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 12:42:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:46,567 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 12:42:46,580 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:46,580 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 12:42:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:46,750 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 12:42:46,763 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:46,763 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 12:42:46,827 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 12:42:46,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:47,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:42:47,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835977883] [2023-12-02 12:42:47,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835977883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495393930] [2023-12-02 12:42:47,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:42:47,881 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:42:47,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:42:47,882 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:42:47,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2023-12-02 12:42:48,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:42:48,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:48,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 12:42:48,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:48,195 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 12:42:48,204 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 12:42:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:48,299 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 12:42:48,309 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:48,310 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 12:42:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:48,387 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 12:42:48,397 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:48,398 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 12:42:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:48,475 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 12:42:48,487 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:48,487 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 12:42:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:48,569 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 12:42:48,579 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:48,579 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 12:42:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:48,662 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 12:42:48,674 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:48,674 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 12:42:48,692 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 12:42:48,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:50,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495393930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:50,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675983233] [2023-12-02 12:42:50,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:42:50,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:50,976 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:50,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-12-02 12:42:51,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:42:51,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:51,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 12:42:51,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:51,133 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 12:42:51,141 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 12:42:51,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:51,249 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 12:42:51,259 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:51,259 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 12:42:51,320 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 12:42:51,363 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:42:51,364 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 12:42:51,372 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 12:42:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:51,480 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 12:42:51,492 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:51,492 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 12:42:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:51,582 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 12:42:51,594 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:51,594 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 12:42:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:51,683 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 12:42:51,697 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:42:51,697 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 12:42:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 18 not checked. [2023-12-02 12:42:51,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:54,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675983233] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:54,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:42:54,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2023-12-02 12:42:54,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929775547] [2023-12-02 12:42:54,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:42:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:42:54,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:42:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:42:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=289, Unknown=2, NotChecked=70, Total=420 [2023-12-02 12:42:54,042 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 12:42:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:55,320 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2023-12-02 12:42:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:42:55,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2023-12-02 12:42:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:55,322 INFO L225 Difference]: With dead ends: 175 [2023-12-02 12:42:55,323 INFO L226 Difference]: Without dead ends: 175 [2023-12-02 12:42:55,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=118, Invalid=700, Unknown=2, NotChecked=110, Total=930 [2023-12-02 12:42:55,323 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 138 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:55,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 346 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 617 Invalid, 0 Unknown, 212 Unchecked, 0.9s Time] [2023-12-02 12:42:55,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-02 12:42:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2023-12-02 12:42:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.2924528301886793) internal successors, (137), 114 states have internal predecessors, (137), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:42:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2023-12-02 12:42:55,329 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 53 [2023-12-02 12:42:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:55,329 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2023-12-02 12:42:55,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 12:42:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2023-12-02 12:42:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 12:42:55,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:55,330 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] [2023-12-02 12:42:55,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-12-02 12:42:55,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:42:55,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2023-12-02 12:42:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:42:55,931 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 12:42:55,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1648599298, now seen corresponding path program 2 times [2023-12-02 12:42:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:42:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781454094] [2023-12-02 12:42:55,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:42:55,932 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 12:42:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:42:55,933 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:42:55,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:42:56,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:42:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:56,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 12:42:56,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:56,170 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 12:42:56,257 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 12:42:56,296 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 12:42:56,381 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:42:56,382 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 12:42:56,502 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 12:42:56,573 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 12:42:56,879 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 12:42:56,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:42:56,952 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 12:42:56,989 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 12:42:56,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:57,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:42:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781454094] [2023-12-02 12:42:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781454094] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734188504] [2023-12-02 12:42:57,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:42:57,596 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:42:57,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:42:57,597 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:42:57,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2023-12-02 12:42:57,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:42:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553609665] [2023-12-02 12:42:57,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:42:57,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:57,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:57,810 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:57,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 1 [2023-12-02 12:42:57,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-12-02 12:42:57,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:42:57,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:57,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:42:57,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:58,278 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 12:42:58,455 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 12:42:58,562 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 12:42:58,610 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:42:58,610 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 12:42:58,826 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 12:42:58,954 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 12:42:59,175 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 12:42:59,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:42:59,209 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 12:42:59,217 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 12:42:59,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:00,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553609665] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:00,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:43:00,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 29 [2023-12-02 12:43:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920782944] [2023-12-02 12:43:00,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:43:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 12:43:00,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:43:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 12:43:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 12:43:00,016 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 24 states have internal predecessors, (57), 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 12:43:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:01,731 INFO L93 Difference]: Finished difference Result 144 states and 178 transitions. [2023-12-02 12:43:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:43:01,732 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 24 states have internal predecessors, (57), 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 53 [2023-12-02 12:43:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:01,733 INFO L225 Difference]: With dead ends: 144 [2023-12-02 12:43:01,733 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 12:43:01,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 12:43:01,735 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:01,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 446 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 12:43:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 12:43:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-12-02 12:43:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 125 states have internal predecessors, (149), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:43:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2023-12-02 12:43:01,739 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 53 [2023-12-02 12:43:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:01,740 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2023-12-02 12:43:01,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 24 states have internal predecessors, (57), 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 12:43:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2023-12-02 12:43:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 12:43:01,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:01,741 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] [2023-12-02 12:43:01,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-12-02 12:43:01,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:43:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:43:02,141 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 12:43:02,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash 539034332, now seen corresponding path program 2 times [2023-12-02 12:43:02,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:43:02,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787424950] [2023-12-02 12:43:02,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:43:02,142 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 12:43:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:43:02,143 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:43:02,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:43:02,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:43:02,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:43:02,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 12:43:02,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:43:02,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:03,288 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 36 treesize of output 32 [2023-12-02 12:43:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:43:05,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:43:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787424950] [2023-12-02 12:43:05,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787424950] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:43:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993043013] [2023-12-02 12:43:05,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:43:05,213 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:43:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:43:05,214 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:43:05,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2023-12-02 12:43:05,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:43:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:43:05,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:43:05,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:43:05,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:06,177 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 36 treesize of output 32 [2023-12-02 12:43:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:43:07,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [993043013] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:43:07,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108815114] [2023-12-02 12:43:07,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:43:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:07,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:07,652 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:07,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-12-02 12:43:07,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:43:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:43:07,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 12:43:07,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:43:08,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:08,579 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 36 treesize of output 32 [2023-12-02 12:43:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:43:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108815114] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:43:11,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:43:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 11, 13, 13] total 42 [2023-12-02 12:43:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550113002] [2023-12-02 12:43:11,439 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:43:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 12:43:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:43:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 12:43:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 12:43:11,441 INFO L87 Difference]: Start difference. First operand 144 states and 178 transitions. Second operand has 43 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 39 states have internal predecessors, (129), 21 states have call successors, (21), 1 states have call predecessors, (21), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2023-12-02 12:43:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:39,146 INFO L93 Difference]: Finished difference Result 313 states and 345 transitions. [2023-12-02 12:43:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-02 12:43:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 39 states have internal predecessors, (129), 21 states have call successors, (21), 1 states have call predecessors, (21), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 55 [2023-12-02 12:43:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:39,150 INFO L225 Difference]: With dead ends: 313 [2023-12-02 12:43:39,150 INFO L226 Difference]: Without dead ends: 313 [2023-12-02 12:43:39,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=1397, Invalid=5913, Unknown=0, NotChecked=0, Total=7310 [2023-12-02 12:43:39,152 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1669 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:39,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 626 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 12:43:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-12-02 12:43:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 161. [2023-12-02 12:43:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 135 states have (on average 1.325925925925926) internal successors, (179), 142 states have internal predecessors, (179), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:43:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 208 transitions. [2023-12-02 12:43:39,157 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 208 transitions. Word has length 55 [2023-12-02 12:43:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:39,157 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 208 transitions. [2023-12-02 12:43:39,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 39 states have internal predecessors, (129), 21 states have call successors, (21), 1 states have call predecessors, (21), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2023-12-02 12:43:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 208 transitions. [2023-12-02 12:43:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 12:43:39,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:39,158 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] [2023-12-02 12:43:39,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2023-12-02 12:43:39,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:43:39,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2023-12-02 12:43:39,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:43:39,759 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:43:39,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -469804902, now seen corresponding path program 2 times [2023-12-02 12:43:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:43:39,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606685324] [2023-12-02 12:43:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:43:39,760 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 12:43:39,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:43:39,761 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:43:39,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:43:39,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:43:39,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:43:39,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:43:39,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:40,028 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 12:43:40,144 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 12:43:40,257 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 12:43:40,540 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 12:43:40,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:41,413 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 12:43:41,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:43:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606685324] [2023-12-02 12:43:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606685324] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:43:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52679358] [2023-12-02 12:43:41,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:43:41,414 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:43:41,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:43:41,414 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:43:41,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2023-12-02 12:43:41,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:43:41,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821318455] [2023-12-02 12:43:41,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:43:41,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:41,700 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:41,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-12-02 12:43:41,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 1 [2023-12-02 12:43:41,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:43:41,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:43:41,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 12:43:41,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:42,149 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 12:43:42,378 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 12:43:42,611 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 12:43:42,881 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 12:43:42,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:44,714 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 12:43:44,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821318455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:43:44,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 12:43:44,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 16, 14] total 41 [2023-12-02 12:43:44,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535431016] [2023-12-02 12:43:44,714 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 12:43:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 12:43:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:43:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 12:43:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:43:44,716 INFO L87 Difference]: Start difference. First operand 161 states and 208 transitions. Second operand has 42 states, 40 states have (on average 2.775) internal successors, (111), 36 states have internal predecessors, (111), 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 12:43:49,848 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 12:43:51,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:43:54,307 WARN L539 Checker$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 12:43:56,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:43:58,314 WARN L539 Checker$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 12:44:04,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:44:06,423 WARN L539 Checker$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 12:44:09,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:44:11,018 WARN L539 Checker$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 12:44:13,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:44:18,171 WARN L539 Checker$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 12:44:22,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:26,538 WARN L539 Checker$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 12:44:29,583 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 12:44:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:30,030 INFO L93 Difference]: Finished difference Result 249 states and 275 transitions. [2023-12-02 12:44:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 12:44:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.775) internal successors, (111), 36 states have internal predecessors, (111), 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) Word has length 56 [2023-12-02 12:44:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:30,033 INFO L225 Difference]: With dead ends: 249 [2023-12-02 12:44:30,033 INFO L226 Difference]: Without dead ends: 249 [2023-12-02 12:44:30,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 173 SyntacticMatches, 12 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1581, Invalid=8319, Unknown=0, NotChecked=0, Total=9900 [2023-12-02 12:44:30,035 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1607 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 59 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:30,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 428 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1501 Invalid, 13 Unknown, 0 Unchecked, 31.2s Time] [2023-12-02 12:44:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-02 12:44:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 169. [2023-12-02 12:44:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.297872340425532) internal successors, (183), 149 states have internal predecessors, (183), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:44:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 212 transitions. [2023-12-02 12:44:30,040 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 212 transitions. Word has length 56 [2023-12-02 12:44:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:30,040 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 212 transitions. [2023-12-02 12:44:30,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.775) internal successors, (111), 36 states have internal predecessors, (111), 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 12:44:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 212 transitions. [2023-12-02 12:44:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 12:44:30,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:30,041 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:30,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-12-02 12:44:30,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:44:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:44:30,442 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:44:30,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1679049989, now seen corresponding path program 2 times [2023-12-02 12:44:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:44:30,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348882089] [2023-12-02 12:44:30,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:44:30,442 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 12:44:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:44:30,443 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:44:30,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:44:30,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:44:30,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:44:30,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:44:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:30,770 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 12:44:30,928 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 12:44:31,107 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 12:44:31,551 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 12:44:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:44:31,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:44:32,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:44:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348882089] [2023-12-02 12:44:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348882089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [444461904] [2023-12-02 12:44:32,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:44:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:44:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:44:32,750 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:44:32,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2023-12-02 12:44:33,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:44:33,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932118257] [2023-12-02 12:44:33,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:44:33,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:33,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:33,009 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:33,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-12-02 12:44:33,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 1 [2023-12-02 12:44:33,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:44:33,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:44:33,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 12:44:33,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:33,585 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 12:44:33,864 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 12:44:34,150 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 12:44:34,489 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 12:44:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:44:34,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:44:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932118257] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:36,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 12:44:36,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17, 14] total 42 [2023-12-02 12:44:36,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240327327] [2023-12-02 12:44:36,740 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 12:44:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:44:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 12:44:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 12:44:36,741 INFO L87 Difference]: Start difference. First operand 169 states and 212 transitions. Second operand has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 15 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2023-12-02 12:44:43,033 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 12:44:45,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:47,666 WARN L539 Checker$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 12:44:49,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:51,673 WARN L539 Checker$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 12:44:59,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:45:01,760 WARN L539 Checker$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 12:45:04,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:45:06,979 WARN L539 Checker$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 12:45:08,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:45:18,748 WARN L539 Checker$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 12:45:23,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:45:26,790 WARN L539 Checker$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 12:45:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:27,396 INFO L93 Difference]: Finished difference Result 243 states and 269 transitions. [2023-12-02 12:45:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-02 12:45:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 15 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) Word has length 57 [2023-12-02 12:45:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:27,399 INFO L225 Difference]: With dead ends: 243 [2023-12-02 12:45:27,399 INFO L226 Difference]: Without dead ends: 243 [2023-12-02 12:45:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 176 SyntacticMatches, 13 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=1522, Invalid=7984, Unknown=0, NotChecked=0, Total=9506 [2023-12-02 12:45:27,401 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1412 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 57 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:27,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 353 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1766 Invalid, 13 Unknown, 0 Unchecked, 31.6s Time] [2023-12-02 12:45:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-12-02 12:45:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2023-12-02 12:45:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 143 states have (on average 1.2727272727272727) internal successors, (182), 151 states have internal predecessors, (182), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:45:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2023-12-02 12:45:27,405 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 57 [2023-12-02 12:45:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:27,405 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2023-12-02 12:45:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 15 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2023-12-02 12:45:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2023-12-02 12:45:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 12:45:27,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:27,406 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:27,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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)] Ended with exit code 0 [2023-12-02 12:45:27,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-12-02 12:45:27,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:27,807 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:45:27,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -510942020, now seen corresponding path program 3 times [2023-12-02 12:45:27,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:45:27,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592001300] [2023-12-02 12:45:27,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:45:27,808 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 12:45:27,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:45:27,809 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:45:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (93)] Waiting until timeout for monitored process [2023-12-02 12:45:28,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:45:28,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:28,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 12:45:28,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:28,105 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 12:45:28,222 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 12:45:28,274 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 12:45:28,361 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:45:28,361 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 12:45:28,510 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 12:45:28,584 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 12:45:28,753 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:45:28,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 12:45:29,019 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 12:45:29,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 52 [2023-12-02 12:45:29,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:45:29,785 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 28 treesize of output 17 [2023-12-02 12:45:30,113 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 28 treesize of output 17 [2023-12-02 12:45:30,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:45:30,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 39 [2023-12-02 12:45:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:45:30,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:32,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:45:32,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592001300] [2023-12-02 12:45:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592001300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118786083] [2023-12-02 12:45:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:45:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:45:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:45:32,093 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:45:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2023-12-02 12:45:32,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:45:32,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072486016] [2023-12-02 12:45:32,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:45:32,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:32,430 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:32,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-12-02 12:45:32,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 1 [2023-12-02 12:45:32,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:45:32,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:32,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 12:45:32,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:32,677 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 12:45:32,739 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 12:45:32,761 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 12:45:32,923 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:45:32,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 12:45:33,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 23 [2023-12-02 12:45:33,405 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 12:45:33,780 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:45:33,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 12:45:34,329 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 12:45:34,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 60 [2023-12-02 12:45:34,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:45:35,915 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 22 treesize of output 26 [2023-12-02 12:45:36,501 INFO L349 Elim1Store]: treesize reduction 66, result has 26.7 percent of original size [2023-12-02 12:45:36,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 48 [2023-12-02 12:45:36,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:45:36,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 52 [2023-12-02 12:45:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:45:36,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:39,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072486016] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:39,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:45:39,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2023-12-02 12:45:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876999752] [2023-12-02 12:45:39,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:45:39,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 12:45:39,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:45:39,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 12:45:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3368, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 12:45:39,321 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 45 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 39 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 12:45:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:43,820 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2023-12-02 12:45:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 12:45:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 39 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2023-12-02 12:45:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:43,822 INFO L225 Difference]: With dead ends: 175 [2023-12-02 12:45:43,822 INFO L226 Difference]: Without dead ends: 175 [2023-12-02 12:45:43,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=453, Invalid=4659, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 12:45:43,824 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:43,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 568 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1447 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 12:45:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-02 12:45:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-12-02 12:45:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 146 states have (on average 1.2602739726027397) internal successors, (184), 154 states have internal predecessors, (184), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:45:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2023-12-02 12:45:43,829 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 58 [2023-12-02 12:45:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:43,829 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2023-12-02 12:45:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 39 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 12:45:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2023-12-02 12:45:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 12:45:43,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:43,831 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:43,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (93)] Ended with exit code 0 [2023-12-02 12:45:44,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-12-02 12:45:44,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:44,231 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:45:44,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1762254787, now seen corresponding path program 5 times [2023-12-02 12:45:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:45:44,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844328727] [2023-12-02 12:45:44,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 12:45:44,232 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 12:45:44,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:45:44,233 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:45:44,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (96)] Waiting until timeout for monitored process [2023-12-02 12:45:44,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-02 12:45:44,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:44,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 12:45:44,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:44,505 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 12:45:44,695 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-12-02 12:45:44,695 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 12 treesize of output 18 [2023-12-02 12:45:45,004 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 12:45:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:45,053 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-12-02 12:45:45,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 26 [2023-12-02 12:45:45,072 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:45,072 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 12:45:45,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:45,291 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 12:45:45,304 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:45,304 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 12:45:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:45,471 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 12:45:45,483 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:45,483 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 12:45:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:45,672 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 12:45:45,684 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:45,684 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 12:45:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:45,874 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 12:45:45,886 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:45,887 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 12:45:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 40 trivial. 20 not checked. [2023-12-02 12:45:45,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:50,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:45:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844328727] [2023-12-02 12:45:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844328727] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [561456581] [2023-12-02 12:45:50,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 12:45:50,638 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:45:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:45:50,639 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:45:50,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2023-12-02 12:45:51,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-02 12:45:51,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:51,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-02 12:45:51,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:51,186 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 12:45:51,266 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-12-02 12:45:51,266 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 12 treesize of output 18 [2023-12-02 12:45:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:51,459 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-12-02 12:45:51,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 26 [2023-12-02 12:45:51,480 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:51,480 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 12:45:51,591 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 12:45:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:51,615 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 12:45:51,642 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:45:51,642 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 12:45:51,779 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 12:45:51,779 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 12:45:51,788 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 12:45:51,980 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:45:51,980 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 12:45:52,007 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:52,008 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 12:45:52,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:52,159 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 12:45:52,170 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:52,170 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 12:45:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 91 refuted. 0 times theorem prover too weak. 24 trivial. 32 not checked. [2023-12-02 12:45:52,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [561456581] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166694700] [2023-12-02 12:45:52,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 12:45:52,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:52,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:52,604 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:52,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-12-02 12:45:53,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-02 12:45:53,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:53,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 12:45:53,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:53,870 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 12:45:53,879 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 12:45:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:54,208 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 12:45:54,220 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:54,221 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 12:45:54,548 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 12:45:54,548 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 12:45:54,556 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 12:45:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:54,898 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 12:45:54,929 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-12-02 12:45:54,929 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 20 treesize of output 22 [2023-12-02 12:45:55,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:55,025 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 12:45:55,047 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:55,047 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 12:45:55,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:55,146 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 12:45:55,157 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:55,157 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 12:45:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:45:55,245 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 12:45:55,260 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:45:55,260 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 12:45:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 50 trivial. 20 not checked. [2023-12-02 12:45:55,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:59,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166694700] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:59,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:45:59,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 20] total 33 [2023-12-02 12:45:59,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808611539] [2023-12-02 12:45:59,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:45:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 12:45:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:45:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 12:45:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1015, Unknown=4, NotChecked=130, Total=1260 [2023-12-02 12:45:59,909 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand has 34 states, 32 states have (on average 1.9375) internal successors, (62), 28 states have internal predecessors, (62), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 12:46:03,278 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 12:46:06,826 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 12:46:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:46:08,326 INFO L93 Difference]: Finished difference Result 237 states and 274 transitions. [2023-12-02 12:46:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:46:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.9375) internal successors, (62), 28 states have internal predecessors, (62), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14) Word has length 62 [2023-12-02 12:46:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:46:08,328 INFO L225 Difference]: With dead ends: 237 [2023-12-02 12:46:08,328 INFO L226 Difference]: Without dead ends: 237 [2023-12-02 12:46:08,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=232, Invalid=2222, Unknown=4, NotChecked=194, Total=2652 [2023-12-02 12:46:08,329 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 185 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:46:08,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 719 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1446 Invalid, 2 Unknown, 266 Unchecked, 7.3s Time] [2023-12-02 12:46:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-12-02 12:46:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 175. [2023-12-02 12:46:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 146 states have (on average 1.2534246575342465) internal successors, (183), 154 states have internal predecessors, (183), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:46:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2023-12-02 12:46:08,335 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 62 [2023-12-02 12:46:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:46:08,336 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2023-12-02 12:46:08,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.9375) internal successors, (62), 28 states have internal predecessors, (62), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 12:46:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2023-12-02 12:46:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 12:46:08,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:46:08,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:46:08,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2023-12-02 12:46:08,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (96)] Forceful destruction successful, exit code 0 [2023-12-02 12:46:08,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-12-02 12:46:08,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:46:08,937 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:46:08,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:46:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1388981991, now seen corresponding path program 3 times [2023-12-02 12:46:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:46:08,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070134044] [2023-12-02 12:46:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:46:08,938 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 12:46:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:46:08,939 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:46:08,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (99)] Waiting until timeout for monitored process [2023-12-02 12:46:09,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:46:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:09,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:46:09,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:09,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:10,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:46:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070134044] [2023-12-02 12:46:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070134044] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:46:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019891739] [2023-12-02 12:46:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:46:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:46:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:46:10,556 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:46:10,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2023-12-02 12:46:10,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:46:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:10,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:46:10,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:11,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1019891739] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:46:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952564743] [2023-12-02 12:46:12,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:46:12,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:46:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:46:12,331 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:46:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2023-12-02 12:46:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:46:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:12,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:46:12,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:12,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:46:13,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952564743] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:46:13,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:46:13,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12, 14, 12, 14] total 28 [2023-12-02 12:46:13,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201503151] [2023-12-02 12:46:13,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:46:13,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 12:46:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:46:13,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 12:46:13,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-12-02 12:46:13,183 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:46:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:46:14,108 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2023-12-02 12:46:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:46:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 60 [2023-12-02 12:46:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:46:14,109 INFO L225 Difference]: With dead ends: 170 [2023-12-02 12:46:14,109 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 12:46:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 12:46:14,110 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:46:14,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 401 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:46:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 12:46:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2023-12-02 12:46:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 143 states have internal predecessors, (164), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:46:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2023-12-02 12:46:14,114 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 60 [2023-12-02 12:46:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:46:14,114 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2023-12-02 12:46:14,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:46:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2023-12-02 12:46:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 12:46:14,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:46:14,114 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:46:14,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (100)] Forceful destruction successful, exit code 0 [2023-12-02 12:46:14,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2023-12-02 12:46:14,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (99)] Forceful destruction successful, exit code 0 [2023-12-02 12:46:14,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:46:14,715 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:46:14,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:46:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash -729557780, now seen corresponding path program 4 times [2023-12-02 12:46:14,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:46:14,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724616655] [2023-12-02 12:46:14,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:46:14,716 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 12:46:14,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:46:14,717 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:46:14,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (102)] Waiting until timeout for monitored process [2023-12-02 12:46:14,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:46:14,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:14,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 12:46:14,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:15,073 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 12:46:15,198 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 12:46:15,255 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 12:46:15,365 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:46:15,365 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 12:46:15,521 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 12:46:15,620 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 12:46:16,042 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 12:46:16,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:46:16,150 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 12:46:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:46:16,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:16,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:46:16,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724616655] [2023-12-02 12:46:16,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724616655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:46:16,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988525206] [2023-12-02 12:46:16,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:46:16,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:46:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:46:16,959 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:46:16,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2023-12-02 12:46:17,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:46:17,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:17,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:46:17,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:17,524 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 12:46:17,573 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 12:46:17,598 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 12:46:17,653 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:46:17,654 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 12:46:17,716 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 12:46:17,751 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 12:46:18,028 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 12:46:18,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:46:18,056 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 12:46:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:46:18,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:18,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988525206] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:46:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844353191] [2023-12-02 12:46:18,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:46:18,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:46:18,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:46:18,316 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:46:18,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2023-12-02 12:46:18,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:46:18,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:18,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 12:46:18,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:18,584 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 12:46:18,634 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 12:46:18,658 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 12:46:18,716 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 12:46:18,716 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 12:46:18,781 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 12:46:18,818 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 12:46:19,089 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 12:46:19,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:46:19,117 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 12:46:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:46:19,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:19,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844353191] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:46:19,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:46:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2023-12-02 12:46:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934663293] [2023-12-02 12:46:19,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:46:19,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:46:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:46:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:46:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2023-12-02 12:46:19,390 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 18 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:46:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:46:21,062 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2023-12-02 12:46:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:46:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 18 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 62 [2023-12-02 12:46:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:46:21,064 INFO L225 Difference]: With dead ends: 176 [2023-12-02 12:46:21,064 INFO L226 Difference]: Without dead ends: 176 [2023-12-02 12:46:21,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2023-12-02 12:46:21,064 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:46:21,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 466 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:46:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-12-02 12:46:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2023-12-02 12:46:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 154 states have internal predecessors, (176), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:46:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 205 transitions. [2023-12-02 12:46:21,069 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 205 transitions. Word has length 62 [2023-12-02 12:46:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:46:21,070 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 205 transitions. [2023-12-02 12:46:21,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 18 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:46:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 205 transitions. [2023-12-02 12:46:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 12:46:21,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:46:21,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:46:21,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (102)] Ended with exit code 0 [2023-12-02 12:46:21,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2023-12-02 12:46:21,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2023-12-02 12:46:21,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:46:21,671 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:46:21,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:46:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash 923091690, now seen corresponding path program 2 times [2023-12-02 12:46:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:46:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468204607] [2023-12-02 12:46:21,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:46:21,672 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 12:46:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:46:21,673 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:46:21,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (105)] Waiting until timeout for monitored process [2023-12-02 12:46:21,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:46:21,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:21,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 12:46:21,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:21,877 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 12:46:21,967 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:46:21,967 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 12:46:22,054 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 12:46:24,110 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_279| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_220| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_220|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_279|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_220|))) is different from true [2023-12-02 12:46:24,186 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 12:46:26,232 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_221| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_280| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_221|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_280|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_221|))) is different from true [2023-12-02 12:46:26,317 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 12:46:28,385 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_281| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_222| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_222|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_281|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_222|))) is different from true [2023-12-02 12:46:28,681 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 12:46:28,747 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 12:46:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2023-12-02 12:46:28,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:28,967 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 12:46:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:46:30,099 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:46:30,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468204607] [2023-12-02 12:46:30,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468204607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:46:30,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948271490] [2023-12-02 12:46:30,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:46:30,099 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:46:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:46:30,100 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:46:30,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2023-12-02 12:46:30,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:46:30,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614779298] [2023-12-02 12:46:30,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:46:30,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:46:30,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:46:30,419 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:46:30,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2023-12-02 12:46:30,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 1 [2023-12-02 12:46:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:46:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:46:30,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 12:46:30,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:30,656 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 12:46:30,892 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 12:46:30,892 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 12:46:31,070 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 12:46:33,175 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_228| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_285| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_228|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_285|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_228|))) is different from true [2023-12-02 12:46:33,334 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 12:46:35,443 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_286| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_229| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_229| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_229|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_286|)))) is different from true [2023-12-02 12:46:35,529 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 12:46:37,552 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_230| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_287| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_230| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_230|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_287|)))) is different from true [2023-12-02 12:46:37,698 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 12:46:37,810 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 12:46:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2023-12-02 12:46:37,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:38,189 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 12:46:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:46:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614779298] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:46:41,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 12:46:41,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 22, 20] total 56 [2023-12-02 12:46:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611191715] [2023-12-02 12:46:41,315 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 12:46:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 12:46:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:46:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 12:46:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2274, Unknown=6, NotChecked=618, Total=3192 [2023-12-02 12:46:41,317 INFO L87 Difference]: Start difference. First operand 176 states and 205 transitions. Second operand has 57 states, 55 states have (on average 2.727272727272727) internal successors, (150), 50 states have internal predecessors, (150), 16 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2023-12-02 12:46:59,376 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 12:47:01,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:47:03,394 WARN L539 Checker$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 12:47:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:47:12,655 INFO L93 Difference]: Finished difference Result 201 states and 236 transitions. [2023-12-02 12:47:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-02 12:47:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.727272727272727) internal successors, (150), 50 states have internal predecessors, (150), 16 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) Word has length 62 [2023-12-02 12:47:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:47:12,658 INFO L225 Difference]: With dead ends: 201 [2023-12-02 12:47:12,658 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 12:47:12,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 179 SyntacticMatches, 13 SemanticMatches, 103 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=1452, Invalid=8266, Unknown=8, NotChecked=1194, Total=10920 [2023-12-02 12:47:12,660 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 640 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 119 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:47:12,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 390 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1600 Invalid, 3 Unknown, 784 Unchecked, 10.3s Time] [2023-12-02 12:47:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 12:47:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 180. [2023-12-02 12:47:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 151 states have (on average 1.218543046357616) internal successors, (184), 158 states have internal predecessors, (184), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2023-12-02 12:47:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2023-12-02 12:47:12,664 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 62 [2023-12-02 12:47:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:47:12,665 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2023-12-02 12:47:12,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.727272727272727) internal successors, (150), 50 states have internal predecessors, (150), 16 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2023-12-02 12:47:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2023-12-02 12:47:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 12:47:12,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:47:12,665 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:47:12,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (105)] Ended with exit code 0 [2023-12-02 12:47:12,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2023-12-02 12:47:13,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:47:13,066 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-12-02 12:47:13,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:47:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1967112979, now seen corresponding path program 3 times [2023-12-02 12:47:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:47:13,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403604867] [2023-12-02 12:47:13,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:47:13,067 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 12:47:13,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:47:13,067 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 12:47:13,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_906f299a-990e-4319-97c1-9abd4e79311e/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 (108)] Waiting until timeout for monitored process [2023-12-02 12:47:13,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:47:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:47:13,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 12:47:13,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:47:13,726 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 25 treesize of output 1 [2023-12-02 12:47:14,002 INFO L349 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2023-12-02 12:47:14,003 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 171 treesize of output 215 [2023-12-02 12:47:14,056 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2023-12-02 12:47:14,057 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 59 treesize of output 16 [2023-12-02 12:47:15,602 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 650 treesize of output 403 [2023-12-02 12:47:16,801 INFO L349 Elim1Store]: treesize reduction 689, result has 17.0 percent of original size [2023-12-02 12:47:16,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1222 treesize of output 1471 [2023-12-02 12:47:17,344 INFO L224 Elim1Store]: Index analysis took 146 ms [2023-12-02 12:47:17,370 INFO L349 Elim1Store]: treesize reduction 339, result has 0.3 percent of original size [2023-12-02 12:47:17,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 444 treesize of output 405 [2023-12-02 12:47:17,709 INFO L349 Elim1Store]: treesize reduction 203, result has 19.4 percent of original size [2023-12-02 12:47:17,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 446 treesize of output 382 [2023-12-02 12:47:18,137 INFO L349 Elim1Store]: treesize reduction 19, result has 71.6 percent of original size [2023-12-02 12:47:18,138 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 1695 treesize of output 1333 [2023-12-02 12:47:26,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:47:26,428 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 1 case distinctions, treesize of input 4189 treesize of output 1866 [2023-12-02 12:47:33,438 INFO L349 Elim1Store]: treesize reduction 3012, result has 11.1 percent of original size [2023-12-02 12:47:33,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 8 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 42 case distinctions, treesize of input 24837 treesize of output 25349