./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/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_12102a17-8ae2-4b60-9b71-0bcea987afd0/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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:32:57,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:32:57,924 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 15:32:57,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:32:57,929 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:32:57,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:32:57,952 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:32:57,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:32:57,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:32:57,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:32:57,954 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:32:57,954 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:32:57,955 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:32:57,955 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:32:57,956 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:32:57,956 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:32:57,957 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:32:57,957 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:32:57,958 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:32:57,958 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:32:57,958 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:32:57,959 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:32:57,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:32:57,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:32:57,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:32:57,961 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:32:57,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:32:57,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:32:57,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:32:57,962 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:32:57,962 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:32:57,963 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:32:57,963 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:32:57,963 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:32:57,963 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:32:57,964 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:32:57,964 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:32:57,964 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:32:57,964 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:32:57,964 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:32:57,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:32:57,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:32:57,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:32:57,965 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:32:57,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:32:57,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:32:57,966 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:32:57,966 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:32:57,966 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_12102a17-8ae2-4b60-9b71-0bcea987afd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2023-12-02 15:32:58,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:32:58,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:32:58,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:32:58,205 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:32:58,205 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:32:58,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-12-02 15:33:00,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:33:01,083 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:33:01,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-12-02 15:33:01,091 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data/9eb19d89a/f2841a5520e6438bace1d2999ad485f1/FLAG2afb45db7 [2023-12-02 15:33:01,105 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data/9eb19d89a/f2841a5520e6438bace1d2999ad485f1 [2023-12-02 15:33:01,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:33:01,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:33:01,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:33:01,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:33:01,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:33:01,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:33:01" (1/1) ... [2023-12-02 15:33:01,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662d26c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:01, skipping insertion in model container [2023-12-02 15:33:01,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:33:01" (1/1) ... [2023-12-02 15:33:01,144 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:33:01,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:33:01,334 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-12-02 15:33:01,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21ee618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:01, skipping insertion in model container [2023-12-02 15:33:01,334 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:33:01,335 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 15:33:01,337 INFO L158 Benchmark]: Toolchain (without parser) took 226.65ms. Allocated memory is still 151.0MB. Free memory was 112.1MB in the beginning and 102.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 15:33:01,337 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 15:33:01,338 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.35ms. Allocated memory is still 151.0MB. Free memory was 112.1MB in the beginning and 102.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 15:33:01,340 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 100.7MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.35ms. Allocated memory is still 151.0MB. Free memory was 112.1MB in the beginning and 102.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/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_12102a17-8ae2-4b60-9b71-0bcea987afd0/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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:33:03,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:33:03,160 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 15:33:03,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:33:03,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:33:03,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:33:03,196 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:33:03,197 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:33:03,197 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:33:03,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:33:03,198 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:33:03,199 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:33:03,199 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:33:03,200 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:33:03,200 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:33:03,201 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:33:03,202 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:33:03,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:33:03,203 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:33:03,203 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:33:03,204 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:33:03,205 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:33:03,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:33:03,205 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:33:03,206 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:33:03,206 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:33:03,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:33:03,207 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:33:03,208 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 15:33:03,208 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 15:33:03,208 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:33:03,209 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:33:03,209 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:33:03,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:33:03,210 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 15:33:03,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:33:03,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:33:03,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:33:03,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:33:03,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:33:03,211 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 15:33:03,211 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:03,212 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:33:03,212 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:33:03,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:33:03,212 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_12102a17-8ae2-4b60-9b71-0bcea987afd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2023-12-02 15:33:03,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:33:03,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:33:03,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:33:03,519 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:33:03,519 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:33:03,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-12-02 15:33:06,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:33:06,422 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:33:06,423 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-12-02 15:33:06,430 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data/c03f0e5cc/c2f8605f47dd462986c2d2567700565b/FLAGd163c111b [2023-12-02 15:33:06,444 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/data/c03f0e5cc/c2f8605f47dd462986c2d2567700565b [2023-12-02 15:33:06,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:33:06,448 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:33:06,449 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:33:06,449 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:33:06,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:33:06,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7b1bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06, skipping insertion in model container [2023-12-02 15:33:06,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,478 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:33:06,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:33:06,655 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 15:33:06,660 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:33:06,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:33:06,689 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:33:06,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:33:06,731 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:33:06,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06 WrapperNode [2023-12-02 15:33:06,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:33:06,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:33:06,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:33:06,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:33:06,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,777 INFO L138 Inliner]: procedures = 26, calls = 42, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 188 [2023-12-02 15:33:06,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:33:06,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:33:06,779 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:33:06,779 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:33:06,786 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,792 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,813 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:33:06,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:33:06,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:33:06,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:33:06,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (1/1) ... [2023-12-02 15:33:06,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:33:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:06,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:33:06,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:33:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:33:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 15:33:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:33:06,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 15:33:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 15:33:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 15:33:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 15:33:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 15:33:06,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:33:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:33:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:33:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:33:06,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 15:33:06,891 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 15:33:07,015 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:33:07,017 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:33:07,615 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:33:07,881 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:33:07,881 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 15:33:07,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:33:07 BoogieIcfgContainer [2023-12-02 15:33:07,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:33:07,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:33:07,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:33:07,887 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:33:07,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:33:06" (1/3) ... [2023-12-02 15:33:07,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768e58ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:33:07, skipping insertion in model container [2023-12-02 15:33:07,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:33:06" (2/3) ... [2023-12-02 15:33:07,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768e58ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:33:07, skipping insertion in model container [2023-12-02 15:33:07,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:33:07" (3/3) ... [2023-12-02 15:33:07,890 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-12-02 15:33:07,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:33:07,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-02 15:33:07,909 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 15:33:07,980 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 15:33:08,010 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 69 transitions, 152 flow [2023-12-02 15:33:08,080 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1024 states, 848 states have (on average 3.3160377358490565) internal successors, (2812), 1023 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:08,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:33:08,106 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;@1cd395dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:33:08,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-12-02 15:33:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 1024 states, 848 states have (on average 3.3160377358490565) internal successors, (2812), 1023 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 15:33:08,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:08,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 15:33:08,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:08,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 618758, now seen corresponding path program 1 times [2023-12-02 15:33:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:08,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436402213] [2023-12-02 15:33:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:08,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:08,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:08,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:08,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 15:33:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:08,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:33:08,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:08,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 15:33:08,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:08,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:08,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:33:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:08,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:08,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:08,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:33:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:08,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:08,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:08,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436402213] [2023-12-02 15:33:08,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436402213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:08,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:08,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:33:08,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956857428] [2023-12-02 15:33:08,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:33:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:33:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:33:08,435 INFO L87 Difference]: Start difference. First operand has 1024 states, 848 states have (on average 3.3160377358490565) internal successors, (2812), 1023 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:08,663 INFO L93 Difference]: Finished difference Result 1021 states and 2809 transitions. [2023-12-02 15:33:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:33:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 15:33:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:08,691 INFO L225 Difference]: With dead ends: 1021 [2023-12-02 15:33:08,691 INFO L226 Difference]: Without dead ends: 1021 [2023-12-02 15:33:08,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:33:08,696 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:08,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2023-12-02 15:33:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1021. [2023-12-02 15:33:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 847 states have (on average 3.3164108618654073) internal successors, (2809), 1020 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2809 transitions. [2023-12-02 15:33:08,799 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2809 transitions. Word has length 3 [2023-12-02 15:33:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:08,799 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 2809 transitions. [2023-12-02 15:33:08,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2809 transitions. [2023-12-02 15:33:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 15:33:08,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:08,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 15:33:08,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:09,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:09,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:09,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash 618759, now seen corresponding path program 1 times [2023-12-02 15:33:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:09,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687606146] [2023-12-02 15:33:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:09,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:09,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:09,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 15:33:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:09,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:33:09,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:09,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:09,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:09,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:09,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:09,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:09,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:09,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:09,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:09,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:09,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:09,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687606146] [2023-12-02 15:33:09,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687606146] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:09,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:09,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:33:09,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716540688] [2023-12-02 15:33:09,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:33:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:33:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:33:09,242 INFO L87 Difference]: Start difference. First operand 1021 states and 2809 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:09,778 INFO L93 Difference]: Finished difference Result 1023 states and 2811 transitions. [2023-12-02 15:33:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:33:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 15:33:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:09,790 INFO L225 Difference]: With dead ends: 1023 [2023-12-02 15:33:09,790 INFO L226 Difference]: Without dead ends: 1023 [2023-12-02 15:33:09,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:33:09,792 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:09,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:33:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2023-12-02 15:33:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2023-12-02 15:33:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 849 states have (on average 3.3109540636042403) internal successors, (2811), 1022 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2811 transitions. [2023-12-02 15:33:09,845 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2811 transitions. Word has length 3 [2023-12-02 15:33:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:09,845 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 2811 transitions. [2023-12-02 15:33:09,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2811 transitions. [2023-12-02 15:33:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:33:09,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:09,846 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-12-02 15:33:09,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 15:33:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:10,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:10,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash 594647455, now seen corresponding path program 1 times [2023-12-02 15:33:10,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:10,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296031390] [2023-12-02 15:33:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:10,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:10,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:10,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 15:33:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:10,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:33:10,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:10,129 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 7 [2023-12-02 15:33:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:10,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:10,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:10,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:10,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296031390] [2023-12-02 15:33:10,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296031390] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:10,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1167726149] [2023-12-02 15:33:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:10,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:10,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:10,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-12-02 15:33:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:10,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:33:10,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:10,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:10,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:10,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:10,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:11,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:11,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1167726149] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:11,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12775764] [2023-12-02 15:33:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:11,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:11,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:11,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:11,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:33:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:11,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:33:11,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:11,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:11,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:11,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:11,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:11,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12775764] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:11,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:11,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-12-02 15:33:11,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200369635] [2023-12-02 15:33:11,528 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:33:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:33:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:11,530 INFO L87 Difference]: Start difference. First operand 1023 states and 2811 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:12,726 INFO L93 Difference]: Finished difference Result 1029 states and 2820 transitions. [2023-12-02 15:33:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:33:12,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:33:12,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:12,734 INFO L225 Difference]: With dead ends: 1029 [2023-12-02 15:33:12,734 INFO L226 Difference]: Without dead ends: 1029 [2023-12-02 15:33:12,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:33:12,736 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:12,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 153 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:33:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2023-12-02 15:33:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1029. [2023-12-02 15:33:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 855 states have (on average 3.2982456140350878) internal successors, (2820), 1028 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2820 transitions. [2023-12-02 15:33:12,764 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2820 transitions. Word has length 5 [2023-12-02 15:33:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:12,765 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 2820 transitions. [2023-12-02 15:33:12,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2820 transitions. [2023-12-02 15:33:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:33:12,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:12,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:33:12,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:12,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2023-12-02 15:33:13,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:33:13,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:13,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:13,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash 594647444, now seen corresponding path program 1 times [2023-12-02 15:33:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:13,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833277940] [2023-12-02 15:33:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:13,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:13,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:13,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 15:33:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:13,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:33:13,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:13,453 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:33:13,453 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 19 treesize of output 22 [2023-12-02 15:33:13,486 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-12-02 15:33:13,486 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 24 treesize of output 22 [2023-12-02 15:33:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:13,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:13,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833277940] [2023-12-02 15:33:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833277940] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:13,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:33:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581657805] [2023-12-02 15:33:13,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:33:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:33:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:33:13,589 INFO L87 Difference]: Start difference. First operand 1029 states and 2820 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:13,777 INFO L93 Difference]: Finished difference Result 860 states and 2297 transitions. [2023-12-02 15:33:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:33:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:33:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:13,785 INFO L225 Difference]: With dead ends: 860 [2023-12-02 15:33:13,785 INFO L226 Difference]: Without dead ends: 860 [2023-12-02 15:33:13,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:33:13,786 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:13,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 16 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-12-02 15:33:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2023-12-02 15:33:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 732 states have (on average 3.137978142076503) internal successors, (2297), 859 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2297 transitions. [2023-12-02 15:33:13,818 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2297 transitions. Word has length 5 [2023-12-02 15:33:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:13,818 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 2297 transitions. [2023-12-02 15:33:13,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2297 transitions. [2023-12-02 15:33:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:33:13,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:13,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:33:13,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 15:33:14,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:14,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:14,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 594647445, now seen corresponding path program 1 times [2023-12-02 15:33:14,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:14,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502507518] [2023-12-02 15:33:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:14,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:14,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 15:33:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:14,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:14,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,140 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:33:14,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2023-12-02 15:33:14,150 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 10 treesize of output 8 [2023-12-02 15:33:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-12-02 15:33:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,188 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 5 treesize of output 3 [2023-12-02 15:33:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:14,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:14,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502507518] [2023-12-02 15:33:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502507518] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [685293405] [2023-12-02 15:33:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:14,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:14,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:14,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:14,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 15:33:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:14,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:33:14,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 15:33:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,925 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 5 treesize of output 3 [2023-12-02 15:33:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:14,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 15:33:14,961 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 10 treesize of output 8 [2023-12-02 15:33:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:15,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [685293405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:15,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:33:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2023-12-02 15:33:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557338474] [2023-12-02 15:33:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:33:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:33:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:15,043 INFO L87 Difference]: Start difference. First operand 860 states and 2297 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:15,253 INFO L93 Difference]: Finished difference Result 691 states and 1774 transitions. [2023-12-02 15:33:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:33:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:33:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:15,264 INFO L225 Difference]: With dead ends: 691 [2023-12-02 15:33:15,265 INFO L226 Difference]: Without dead ends: 691 [2023-12-02 15:33:15,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:15,266 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:15,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 15 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-12-02 15:33:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2023-12-02 15:33:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 609 states have (on average 2.9129720853858787) internal successors, (1774), 690 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1774 transitions. [2023-12-02 15:33:15,282 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1774 transitions. Word has length 5 [2023-12-02 15:33:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:15,283 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 1774 transitions. [2023-12-02 15:33:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1774 transitions. [2023-12-02 15:33:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 15:33:15,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:15,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:15,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:15,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 15:33:15,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:15,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:15,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1597460586, now seen corresponding path program 1 times [2023-12-02 15:33:15,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:15,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362746135] [2023-12-02 15:33:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:15,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:15,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:15,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 15:33:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:15,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:33:15,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:15,778 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:33:15,779 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-12-02 15:33:15,795 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:33:15,795 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-12-02 15:33:15,819 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:33:15,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-12-02 15:33:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:15,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:15,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362746135] [2023-12-02 15:33:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362746135] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:15,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:15,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:33:15,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752832752] [2023-12-02 15:33:15,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:15,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:33:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:33:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:33:15,925 INFO L87 Difference]: Start difference. First operand 691 states and 1774 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:16,071 INFO L93 Difference]: Finished difference Result 657 states and 1703 transitions. [2023-12-02 15:33:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:33:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 15:33:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:16,077 INFO L225 Difference]: With dead ends: 657 [2023-12-02 15:33:16,077 INFO L226 Difference]: Without dead ends: 657 [2023-12-02 15:33:16,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:33:16,078 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:16,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:33:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-12-02 15:33:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2023-12-02 15:33:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 593 states have (on average 2.8718381112984823) internal successors, (1703), 656 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1703 transitions. [2023-12-02 15:33:16,094 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1703 transitions. Word has length 8 [2023-12-02 15:33:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:16,094 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 1703 transitions. [2023-12-02 15:33:16,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1703 transitions. [2023-12-02 15:33:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 15:33:16,095 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:16,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:16,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:33:16,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:16,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:16,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1597460585, now seen corresponding path program 1 times [2023-12-02 15:33:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:16,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288685059] [2023-12-02 15:33:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:16,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:16,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:16,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:16,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:33:16,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:16,400 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 15:33:16,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2023-12-02 15:33:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:16,428 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-12-02 15:33:16,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 13 [2023-12-02 15:33:16,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:16,466 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-12-02 15:33:16,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 15:33:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:16,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:17,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288685059] [2023-12-02 15:33:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288685059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:17,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2017531066] [2023-12-02 15:33:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:17,265 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:17,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:17,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:17,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-02 15:33:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:17,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:33:17,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:17,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 15:33:17,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:17,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 15:33:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:17,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 15:33:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:17,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:17,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2017531066] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:17,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:33:17,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2023-12-02 15:33:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253983909] [2023-12-02 15:33:17,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:17,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:33:17,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:33:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:17,565 INFO L87 Difference]: Start difference. First operand 657 states and 1703 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:17,818 INFO L93 Difference]: Finished difference Result 623 states and 1632 transitions. [2023-12-02 15:33:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:33:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 15:33:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:17,823 INFO L225 Difference]: With dead ends: 623 [2023-12-02 15:33:17,823 INFO L226 Difference]: Without dead ends: 623 [2023-12-02 15:33:17,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:17,824 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:17,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-12-02 15:33:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2023-12-02 15:33:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 577 states have (on average 2.82842287694974) internal successors, (1632), 622 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1632 transitions. [2023-12-02 15:33:17,838 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1632 transitions. Word has length 8 [2023-12-02 15:33:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:17,838 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 1632 transitions. [2023-12-02 15:33:17,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1632 transitions. [2023-12-02 15:33:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:33:17,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:17,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:17,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:18,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2023-12-02 15:33:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:18,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:18,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2018395151, now seen corresponding path program 1 times [2023-12-02 15:33:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:18,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405394018] [2023-12-02 15:33:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:18,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:18,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:18,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:18,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:33:18,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:18,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-12-02 15:33:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:18,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:18,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:33:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:18,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:18,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:18,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:33:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:18,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:18,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405394018] [2023-12-02 15:33:18,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405394018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:18,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:18,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:33:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56764111] [2023-12-02 15:33:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:33:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:33:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:33:18,350 INFO L87 Difference]: Start difference. First operand 623 states and 1632 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:18,571 INFO L93 Difference]: Finished difference Result 410 states and 1071 transitions. [2023-12-02 15:33:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:33:18,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:33:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:18,574 INFO L225 Difference]: With dead ends: 410 [2023-12-02 15:33:18,575 INFO L226 Difference]: Without dead ends: 410 [2023-12-02 15:33:18,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:33:18,576 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:18,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 10 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-12-02 15:33:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-12-02 15:33:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 393 states have (on average 2.7251908396946565) internal successors, (1071), 409 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1071 transitions. [2023-12-02 15:33:18,587 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1071 transitions. Word has length 9 [2023-12-02 15:33:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:18,588 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 1071 transitions. [2023-12-02 15:33:18,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1071 transitions. [2023-12-02 15:33:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:33:18,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:18,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:18,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:18,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:18,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:18,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2018395152, now seen corresponding path program 1 times [2023-12-02 15:33:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:18,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192421167] [2023-12-02 15:33:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:18,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:18,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:18,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:18,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:33:18,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:18,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:19,088 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 35 treesize of output 31 [2023-12-02 15:33:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:19,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:19,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192421167] [2023-12-02 15:33:19,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192421167] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:19,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812454063] [2023-12-02 15:33:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:19,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:19,186 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:19,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-02 15:33:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:19,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:19,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:19,322 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 7 [2023-12-02 15:33:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:19,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:19,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:19,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:19,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:19,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:19,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:19,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1812454063] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788234397] [2023-12-02 15:33:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:20,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:20,070 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:20,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:33:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:20,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 15:33:20,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:20,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:20,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:20,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:20,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:20,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:20,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:20,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:20,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:20,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788234397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:20,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:20,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 16 [2023-12-02 15:33:20,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667401186] [2023-12-02 15:33:20,641 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:20,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 15:33:20,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 15:33:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:33:20,642 INFO L87 Difference]: Start difference. First operand 410 states and 1071 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:22,164 INFO L93 Difference]: Finished difference Result 1006 states and 2630 transitions. [2023-12-02 15:33:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:33:22,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:33:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:22,172 INFO L225 Difference]: With dead ends: 1006 [2023-12-02 15:33:22,172 INFO L226 Difference]: Without dead ends: 1006 [2023-12-02 15:33:22,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:33:22,173 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 125 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:22,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 56 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 15:33:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2023-12-02 15:33:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 542. [2023-12-02 15:33:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 525 states have (on average 2.862857142857143) internal successors, (1503), 541 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1503 transitions. [2023-12-02 15:33:22,187 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1503 transitions. Word has length 9 [2023-12-02 15:33:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:22,187 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 1503 transitions. [2023-12-02 15:33:22,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1503 transitions. [2023-12-02 15:33:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:33:22,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:22,188 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-12-02 15:33:22,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:22,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:22,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2023-12-02 15:33:22,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:22,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:22,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -801018009, now seen corresponding path program 2 times [2023-12-02 15:33:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:22,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899522864] [2023-12-02 15:33:22,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:22,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:22,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:22,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:22,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:33:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:22,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:22,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:22,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:22,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:22,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:22,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:22,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:22,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:22,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:23,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:23,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899522864] [2023-12-02 15:33:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899522864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1219791700] [2023-12-02 15:33:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:23,835 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:23,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:23,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 15:33:23,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:33:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:23,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:23,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:23,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:24,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:24,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:24,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1219791700] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091437089] [2023-12-02 15:33:24,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:24,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:24,402 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:24,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 15:33:24,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:33:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:24,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:33:24,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:24,500 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 7 [2023-12-02 15:33:24,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:24,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:24,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:24,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:24,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091437089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:24,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2023-12-02 15:33:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616197693] [2023-12-02 15:33:24,935 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:24,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:33:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:33:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:33:24,936 INFO L87 Difference]: Start difference. First operand 542 states and 1503 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:28,687 INFO L93 Difference]: Finished difference Result 554 states and 1521 transitions. [2023-12-02 15:33:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 15:33:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 15:33:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:28,692 INFO L225 Difference]: With dead ends: 554 [2023-12-02 15:33:28,692 INFO L226 Difference]: Without dead ends: 554 [2023-12-02 15:33:28,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2023-12-02 15:33:28,693 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:28,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 15:33:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-12-02 15:33:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2023-12-02 15:33:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 537 states have (on average 2.8324022346368714) internal successors, (1521), 553 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1521 transitions. [2023-12-02 15:33:28,712 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1521 transitions. Word has length 11 [2023-12-02 15:33:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:28,713 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 1521 transitions. [2023-12-02 15:33:28,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1521 transitions. [2023-12-02 15:33:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:33:28,714 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:28,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:28,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2023-12-02 15:33:28,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 15:33:29,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 15:33:29,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:29,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:29,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1647455532, now seen corresponding path program 1 times [2023-12-02 15:33:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:29,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723299752] [2023-12-02 15:33:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:29,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:29,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:29,317 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:29,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:29,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:33:29,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:29,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:29,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:29,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:29,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:29,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:29,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:29,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:29,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:30,444 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723299752] [2023-12-02 15:33:30,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723299752] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:30,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677495198] [2023-12-02 15:33:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:30,444 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:30,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:30,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:30,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 15:33:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:30,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 15:33:30,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:30,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:30,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:30,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:30,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:30,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:30,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:30,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:30,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:30,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:31,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1677495198] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:31,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176887804] [2023-12-02 15:33:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:31,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:31,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:31,240 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:31,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 15:33:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:31,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:33:31,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:31,339 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 7 [2023-12-02 15:33:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:31,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:31,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:31,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:31,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:31,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:31,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:31,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:33:31,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176887804] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:31,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:31,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5, 5, 5, 5] total 13 [2023-12-02 15:33:31,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012318589] [2023-12-02 15:33:31,952 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:31,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 15:33:31,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 15:33:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:33:31,953 INFO L87 Difference]: Start difference. First operand 554 states and 1521 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:35,209 INFO L93 Difference]: Finished difference Result 1482 states and 4129 transitions. [2023-12-02 15:33:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:33:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 15:33:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:35,218 INFO L225 Difference]: With dead ends: 1482 [2023-12-02 15:33:35,218 INFO L226 Difference]: Without dead ends: 1482 [2023-12-02 15:33:35,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:33:35,219 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:35,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 51 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 15:33:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2023-12-02 15:33:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 754. [2023-12-02 15:33:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 737 states have (on average 2.9009497964721844) internal successors, (2138), 753 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2138 transitions. [2023-12-02 15:33:35,237 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2138 transitions. Word has length 11 [2023-12-02 15:33:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:35,237 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2138 transitions. [2023-12-02 15:33:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2138 transitions. [2023-12-02 15:33:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 15:33:35,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:35,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:35,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 15:33:35,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:35,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:35,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:35,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:35,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1471706825, now seen corresponding path program 1 times [2023-12-02 15:33:35,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:35,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108983203] [2023-12-02 15:33:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:35,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:35,841 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:35,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:35,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:33:35,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:36,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:36,215 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 35 treesize of output 31 [2023-12-02 15:33:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:36,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108983203] [2023-12-02 15:33:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108983203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1555004265] [2023-12-02 15:33:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:36,317 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:36,318 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:36,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-12-02 15:33:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:36,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:36,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:36,467 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 7 [2023-12-02 15:33:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:36,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:36,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:36,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:36,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:36,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:36,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1555004265] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714262673] [2023-12-02 15:33:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:37,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:37,312 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:37,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 15:33:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:37,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 15:33:37,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:37,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:37,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:37,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:37,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:37,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:37,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:37,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:38,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714262673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:38,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:38,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 16 [2023-12-02 15:33:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251977350] [2023-12-02 15:33:38,007 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:38,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 15:33:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 15:33:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:33:38,008 INFO L87 Difference]: Start difference. First operand 754 states and 2138 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:39,339 INFO L93 Difference]: Finished difference Result 1269 states and 3652 transitions. [2023-12-02 15:33:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:33:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 15:33:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:39,347 INFO L225 Difference]: With dead ends: 1269 [2023-12-02 15:33:39,347 INFO L226 Difference]: Without dead ends: 1269 [2023-12-02 15:33:39,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:33:39,348 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:39,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:33:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2023-12-02 15:33:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1018. [2023-12-02 15:33:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1001 states have (on average 3.002997002997003) internal successors, (3006), 1017 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3006 transitions. [2023-12-02 15:33:39,377 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3006 transitions. Word has length 12 [2023-12-02 15:33:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:39,378 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 3006 transitions. [2023-12-02 15:33:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3006 transitions. [2023-12-02 15:33:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:33:39,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:39,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:39,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 15:33:39,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:33:39,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:39,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:39,984 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:39,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1621729363, now seen corresponding path program 1 times [2023-12-02 15:33:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022229651] [2023-12-02 15:33:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:39,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:39,986 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:39,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:40,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:33:40,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:40,077 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 7 [2023-12-02 15:33:40,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:40,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:40,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:40,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:40,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:40,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:40,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:40,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:41,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:41,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022229651] [2023-12-02 15:33:41,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022229651] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:41,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [738024993] [2023-12-02 15:33:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:41,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:41,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:41,264 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:41,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 15:33:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:41,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 15:33:41,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:41,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:41,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:41,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:41,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:41,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:41,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:41,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [738024993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380326995] [2023-12-02 15:33:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:42,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:42,231 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 15:33:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:42,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:33:42,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:42,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:42,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:42,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:42,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:42,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:42,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:42,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:42,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:43,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380326995] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:43,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:43,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5, 5, 5, 5] total 13 [2023-12-02 15:33:43,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141340049] [2023-12-02 15:33:43,036 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:43,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 15:33:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 15:33:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:33:43,037 INFO L87 Difference]: Start difference. First operand 1018 states and 3006 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:46,340 INFO L93 Difference]: Finished difference Result 1440 states and 4077 transitions. [2023-12-02 15:33:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:33:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 15:33:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:46,349 INFO L225 Difference]: With dead ends: 1440 [2023-12-02 15:33:46,349 INFO L226 Difference]: Without dead ends: 1440 [2023-12-02 15:33:46,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:33:46,350 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:46,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 66 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 15:33:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2023-12-02 15:33:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 946. [2023-12-02 15:33:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 929 states have (on average 2.9020452099031218) internal successors, (2696), 945 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2696 transitions. [2023-12-02 15:33:46,372 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2696 transitions. Word has length 13 [2023-12-02 15:33:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:46,372 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 2696 transitions. [2023-12-02 15:33:46,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2696 transitions. [2023-12-02 15:33:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 15:33:46,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:46,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:46,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 15:33:46,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:46,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:46,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:46,978 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:46,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash 378024604, now seen corresponding path program 2 times [2023-12-02 15:33:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:46,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247822678] [2023-12-02 15:33:46,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:46,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:46,980 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:46,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:47,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:33:47,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:47,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:47,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:47,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:47,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:47,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:47,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:47,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:47,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:47,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:33:47,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:33:48,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247822678] [2023-12-02 15:33:48,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247822678] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [691604596] [2023-12-02 15:33:48,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:48,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:48,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:48,132 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:48,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 15:33:48,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:33:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:48,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:48,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:48,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:33:48,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:48,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:48,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:48,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:48,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:48,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:48,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:33:48,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:33:48,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [691604596] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:48,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915209832] [2023-12-02 15:33:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:48,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:48,960 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:48,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 15:33:49,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:33:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:49,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:33:49,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:49,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:49,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:49,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:49,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:49,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:49,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:49,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:33:49,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:33:49,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915209832] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:49,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:33:49,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2023-12-02 15:33:49,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147548619] [2023-12-02 15:33:49,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:33:49,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:33:49,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:33:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:33:49,713 INFO L87 Difference]: Start difference. First operand 946 states and 2696 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:50,537 INFO L93 Difference]: Finished difference Result 856 states and 2437 transitions. [2023-12-02 15:33:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:33:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 15:33:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:50,543 INFO L225 Difference]: With dead ends: 856 [2023-12-02 15:33:50,543 INFO L226 Difference]: Without dead ends: 856 [2023-12-02 15:33:50,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:33:50,544 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:50,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 15:33:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-12-02 15:33:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 640. [2023-12-02 15:33:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 631 states have (on average 2.7274167987321714) internal successors, (1721), 639 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1721 transitions. [2023-12-02 15:33:50,561 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1721 transitions. Word has length 17 [2023-12-02 15:33:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:50,561 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 1721 transitions. [2023-12-02 15:33:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1721 transitions. [2023-12-02 15:33:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 15:33:50,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:50,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:50,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 15:33:50,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-02 15:33:50,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:51,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:51,164 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:51,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1807012325, now seen corresponding path program 2 times [2023-12-02 15:33:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:51,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64742450] [2023-12-02 15:33:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:33:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:51,166 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:51,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:33:51,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:33:51,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:51,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:33:51,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:51,274 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 7 [2023-12-02 15:33:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:51,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:51,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:51,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:51,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:51,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:51,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:33:51,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:51,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64742450] [2023-12-02 15:33:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64742450] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:51,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:51,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:33:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954371267] [2023-12-02 15:33:51,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:33:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:33:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:33:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:33:51,527 INFO L87 Difference]: Start difference. First operand 640 states and 1721 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:51,961 INFO L93 Difference]: Finished difference Result 535 states and 1455 transitions. [2023-12-02 15:33:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:33:51,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 15:33:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:51,966 INFO L225 Difference]: With dead ends: 535 [2023-12-02 15:33:51,966 INFO L226 Difference]: Without dead ends: 535 [2023-12-02 15:33:51,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:33:51,967 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:51,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:33:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-12-02 15:33:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 251. [2023-12-02 15:33:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 249 states have (on average 2.570281124497992) internal successors, (640), 250 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 640 transitions. [2023-12-02 15:33:51,975 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 640 transitions. Word has length 19 [2023-12-02 15:33:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:51,976 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 640 transitions. [2023-12-02 15:33:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:33:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 640 transitions. [2023-12-02 15:33:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 15:33:51,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:51,977 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2023-12-02 15:33:51,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:33:52,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:52,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:33:52,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1844365065, now seen corresponding path program 3 times [2023-12-02 15:33:52,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:33:52,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102623259] [2023-12-02 15:33:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:33:52,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:33:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:33:52,180 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:33:52,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 15:33:52,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 15:33:52,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:52,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:33:52,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:52,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:33:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:52,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:52,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:52,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:52,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:52,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:52,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:52,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:52,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:53,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:56,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:33:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102623259] [2023-12-02 15:33:56,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102623259] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:33:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709169931] [2023-12-02 15:33:56,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:33:56,042 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:33:56,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:33:56,043 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:33:56,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 15:33:56,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 15:33:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:33:56,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:33:56,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:56,900 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 7 [2023-12-02 15:33:56,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:56,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:56,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:56,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:56,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:56,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:56,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:33:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:56,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:57,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:00,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709169931] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660404315] [2023-12-02 15:34:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:34:00,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:00,571 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:00,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 15:34:07,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 15:34:07,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:07,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:34:07,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:07,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 15:34:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:34:07,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:34:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:34:07,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:34:07,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:34:07,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:34:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:34:07,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:34:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:34:07,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:34:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:07,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:34:08,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660404315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:08,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:34:08,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 34 [2023-12-02 15:34:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111229297] [2023-12-02 15:34:08,585 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:34:08,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 15:34:08,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 15:34:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 15:34:08,587 INFO L87 Difference]: Start difference. First operand 251 states and 640 transitions. Second operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:37,812 INFO L93 Difference]: Finished difference Result 275 states and 676 transitions. [2023-12-02 15:34:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 15:34:37,813 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 15:34:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:37,814 INFO L225 Difference]: With dead ends: 275 [2023-12-02 15:34:37,814 INFO L226 Difference]: Without dead ends: 275 [2023-12-02 15:34:37,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1332, Invalid=3090, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 15:34:37,816 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:37,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 95 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-02 15:34:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-12-02 15:34:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2023-12-02 15:34:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 2.4761904761904763) internal successors, (676), 274 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 676 transitions. [2023-12-02 15:34:37,821 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 676 transitions. Word has length 23 [2023-12-02 15:34:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:37,821 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 676 transitions. [2023-12-02 15:34:37,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 676 transitions. [2023-12-02 15:34:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:34:37,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:37,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:37,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-12-02 15:34:38,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:38,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 15:34:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:38,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:38,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1625397044, now seen corresponding path program 1 times [2023-12-02 15:34:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353895875] [2023-12-02 15:34:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:38,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:38,425 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:38,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-12-02 15:34:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:38,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:34:38,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:38,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:38,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:38,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353895875] [2023-12-02 15:34:38,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353895875] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:38,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:38,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:34:38,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884247757] [2023-12-02 15:34:38,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:38,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:34:38,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:38,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:34:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:34:38,593 INFO L87 Difference]: Start difference. First operand 275 states and 676 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:38,728 INFO L93 Difference]: Finished difference Result 447 states and 1150 transitions. [2023-12-02 15:34:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:34:38,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 15:34:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:38,732 INFO L225 Difference]: With dead ends: 447 [2023-12-02 15:34:38,732 INFO L226 Difference]: Without dead ends: 434 [2023-12-02 15:34:38,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:34:38,732 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:38,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-12-02 15:34:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 350. [2023-12-02 15:34:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 348 states have (on average 2.5804597701149423) internal successors, (898), 349 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 898 transitions. [2023-12-02 15:34:38,740 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 898 transitions. Word has length 25 [2023-12-02 15:34:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:38,740 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 898 transitions. [2023-12-02 15:34:38,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 898 transitions. [2023-12-02 15:34:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:38,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:38,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:38,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2023-12-02 15:34:38,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:38,942 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:38,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 970419555, now seen corresponding path program 1 times [2023-12-02 15:34:38,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:38,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842353388] [2023-12-02 15:34:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:38,944 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:38,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 15:34:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:39,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:34:39,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:39,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:39,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:39,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842353388] [2023-12-02 15:34:39,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842353388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:39,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:39,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:34:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579019088] [2023-12-02 15:34:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:39,088 INFO L87 Difference]: Start difference. First operand 350 states and 898 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:39,406 INFO L93 Difference]: Finished difference Result 515 states and 1329 transitions. [2023-12-02 15:34:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:39,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:39,409 INFO L225 Difference]: With dead ends: 515 [2023-12-02 15:34:39,409 INFO L226 Difference]: Without dead ends: 509 [2023-12-02 15:34:39,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:39,410 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:39,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 36 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-12-02 15:34:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 434. [2023-12-02 15:34:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 432 states have (on average 2.611111111111111) internal successors, (1128), 433 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1128 transitions. [2023-12-02 15:34:39,419 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1128 transitions. Word has length 26 [2023-12-02 15:34:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:39,419 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 1128 transitions. [2023-12-02 15:34:39,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1128 transitions. [2023-12-02 15:34:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:39,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:39,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:39,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:39,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:39,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:39,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1076177098, now seen corresponding path program 1 times [2023-12-02 15:34:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:39,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299787353] [2023-12-02 15:34:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:39,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:39,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:39,622 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:39,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 15:34:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:39,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:39,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:39,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:39,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299787353] [2023-12-02 15:34:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299787353] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:39,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:39,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:39,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820186081] [2023-12-02 15:34:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:39,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:39,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:39,751 INFO L87 Difference]: Start difference. First operand 434 states and 1128 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:40,057 INFO L93 Difference]: Finished difference Result 521 states and 1337 transitions. [2023-12-02 15:34:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:40,060 INFO L225 Difference]: With dead ends: 521 [2023-12-02 15:34:40,060 INFO L226 Difference]: Without dead ends: 521 [2023-12-02 15:34:40,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:40,061 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:40,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 44 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-12-02 15:34:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 440. [2023-12-02 15:34:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 438 states have (on average 2.6004566210045663) internal successors, (1139), 439 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1139 transitions. [2023-12-02 15:34:40,069 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1139 transitions. Word has length 26 [2023-12-02 15:34:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:40,070 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1139 transitions. [2023-12-02 15:34:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1139 transitions. [2023-12-02 15:34:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:40,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:40,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:40,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 15:34:40,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:40,273 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:40,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:40,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1193403382, now seen corresponding path program 2 times [2023-12-02 15:34:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:40,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676962190] [2023-12-02 15:34:40,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:34:40,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:40,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:40,275 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:40,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:34:40,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:34:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:40,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:40,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:40,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:40,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676962190] [2023-12-02 15:34:40,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676962190] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:40,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:40,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629005316] [2023-12-02 15:34:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:40,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:40,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:40,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:40,388 INFO L87 Difference]: Start difference. First operand 440 states and 1139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:40,715 INFO L93 Difference]: Finished difference Result 644 states and 1639 transitions. [2023-12-02 15:34:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:40,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:40,719 INFO L225 Difference]: With dead ends: 644 [2023-12-02 15:34:40,719 INFO L226 Difference]: Without dead ends: 638 [2023-12-02 15:34:40,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:40,719 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:40,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 50 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-12-02 15:34:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 488. [2023-12-02 15:34:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 486 states have (on average 2.6419753086419755) internal successors, (1284), 487 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1284 transitions. [2023-12-02 15:34:40,729 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1284 transitions. Word has length 26 [2023-12-02 15:34:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:40,730 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 1284 transitions. [2023-12-02 15:34:40,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1284 transitions. [2023-12-02 15:34:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:40,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:40,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:40,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:34:40,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:40,932 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:40,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash -694496521, now seen corresponding path program 2 times [2023-12-02 15:34:40,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:40,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453004393] [2023-12-02 15:34:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:34:40,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:40,933 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:40,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 15:34:41,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:34:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:41,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:34:41,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:41,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:41,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:41,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453004393] [2023-12-02 15:34:41,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453004393] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:41,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:41,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:34:41,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018355948] [2023-12-02 15:34:41,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:41,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:41,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:41,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:41,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:41,056 INFO L87 Difference]: Start difference. First operand 488 states and 1284 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:41,297 INFO L93 Difference]: Finished difference Result 566 states and 1478 transitions. [2023-12-02 15:34:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:41,301 INFO L225 Difference]: With dead ends: 566 [2023-12-02 15:34:41,301 INFO L226 Difference]: Without dead ends: 566 [2023-12-02 15:34:41,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:41,302 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:41,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-12-02 15:34:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 491. [2023-12-02 15:34:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 489 states have (on average 2.642126789366053) internal successors, (1292), 490 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1292 transitions. [2023-12-02 15:34:41,313 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1292 transitions. Word has length 26 [2023-12-02 15:34:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:41,313 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 1292 transitions. [2023-12-02 15:34:41,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1292 transitions. [2023-12-02 15:34:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:41,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:41,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:41,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:41,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:41,515 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:41,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash -638146614, now seen corresponding path program 3 times [2023-12-02 15:34:41,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:41,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517080672] [2023-12-02 15:34:41,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:34:41,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:41,517 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:41,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 15:34:41,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 15:34:41,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:41,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:41,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:41,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:41,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:41,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517080672] [2023-12-02 15:34:41,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517080672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:41,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:41,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:41,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142067314] [2023-12-02 15:34:41,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:41,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:41,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:41,640 INFO L87 Difference]: Start difference. First operand 491 states and 1292 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:41,956 INFO L93 Difference]: Finished difference Result 590 states and 1536 transitions. [2023-12-02 15:34:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:41,959 INFO L225 Difference]: With dead ends: 590 [2023-12-02 15:34:41,959 INFO L226 Difference]: Without dead ends: 590 [2023-12-02 15:34:41,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:41,960 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:41,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-12-02 15:34:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 470. [2023-12-02 15:34:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 468 states have (on average 2.626068376068376) internal successors, (1229), 469 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1229 transitions. [2023-12-02 15:34:41,972 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1229 transitions. Word has length 26 [2023-12-02 15:34:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:41,972 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1229 transitions. [2023-12-02 15:34:41,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1229 transitions. [2023-12-02 15:34:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:41,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:41,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:41,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-12-02 15:34:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:42,175 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:42,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash -45789420, now seen corresponding path program 4 times [2023-12-02 15:34:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659177357] [2023-12-02 15:34:42,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:34:42,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:42,177 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:42,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:34:42,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:34:42,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:42,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:42,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:42,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:42,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659177357] [2023-12-02 15:34:42,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659177357] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:42,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:42,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:42,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952309993] [2023-12-02 15:34:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:42,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:42,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:42,316 INFO L87 Difference]: Start difference. First operand 470 states and 1229 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:42,588 INFO L93 Difference]: Finished difference Result 692 states and 1807 transitions. [2023-12-02 15:34:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:42,592 INFO L225 Difference]: With dead ends: 692 [2023-12-02 15:34:42,592 INFO L226 Difference]: Without dead ends: 680 [2023-12-02 15:34:42,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:42,593 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:42,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-12-02 15:34:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 497. [2023-12-02 15:34:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 495 states have (on average 2.6747474747474747) internal successors, (1324), 496 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1324 transitions. [2023-12-02 15:34:42,605 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1324 transitions. Word has length 26 [2023-12-02 15:34:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:42,605 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1324 transitions. [2023-12-02 15:34:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1324 transitions. [2023-12-02 15:34:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:42,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:42,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:42,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:42,806 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash 509467348, now seen corresponding path program 5 times [2023-12-02 15:34:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:42,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319315044] [2023-12-02 15:34:42,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 15:34:42,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:42,808 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:42,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-12-02 15:34:42,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:34:42,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:42,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:42,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:42,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:42,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319315044] [2023-12-02 15:34:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319315044] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:42,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:42,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726361773] [2023-12-02 15:34:42,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:42,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:42,947 INFO L87 Difference]: Start difference. First operand 497 states and 1324 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:43,297 INFO L93 Difference]: Finished difference Result 734 states and 1928 transitions. [2023-12-02 15:34:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:43,300 INFO L225 Difference]: With dead ends: 734 [2023-12-02 15:34:43,300 INFO L226 Difference]: Without dead ends: 734 [2023-12-02 15:34:43,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:43,300 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:43,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2023-12-02 15:34:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 494. [2023-12-02 15:34:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 492 states have (on average 2.66260162601626) internal successors, (1310), 493 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1310 transitions. [2023-12-02 15:34:43,311 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1310 transitions. Word has length 26 [2023-12-02 15:34:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:43,311 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 1310 transitions. [2023-12-02 15:34:43,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1310 transitions. [2023-12-02 15:34:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:43,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:43,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:43,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-12-02 15:34:43,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:43,513 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:43,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1795035081, now seen corresponding path program 3 times [2023-12-02 15:34:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:43,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445598111] [2023-12-02 15:34:43,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:34:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:43,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:43,514 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:43,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 15:34:43,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 15:34:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:43,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:34:43,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:43,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:43,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:43,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445598111] [2023-12-02 15:34:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445598111] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:43,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:43,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:34:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437214241] [2023-12-02 15:34:43,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:43,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:43,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:43,640 INFO L87 Difference]: Start difference. First operand 494 states and 1310 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:43,865 INFO L93 Difference]: Finished difference Result 545 states and 1416 transitions. [2023-12-02 15:34:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:43,867 INFO L225 Difference]: With dead ends: 545 [2023-12-02 15:34:43,867 INFO L226 Difference]: Without dead ends: 545 [2023-12-02 15:34:43,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:43,868 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:43,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-12-02 15:34:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2023-12-02 15:34:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 498 states have (on average 2.6566265060240966) internal successors, (1323), 499 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1323 transitions. [2023-12-02 15:34:43,877 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1323 transitions. Word has length 26 [2023-12-02 15:34:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:43,877 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1323 transitions. [2023-12-02 15:34:43,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1323 transitions. [2023-12-02 15:34:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:34:43,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:43,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:43,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:34:44,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:44,079 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:44,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash -318997362, now seen corresponding path program 6 times [2023-12-02 15:34:44,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:44,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499927951] [2023-12-02 15:34:44,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-02 15:34:44,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:44,081 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:44,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:34:44,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-12-02 15:34:44,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:44,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:44,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:44,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:44,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:44,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499927951] [2023-12-02 15:34:44,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499927951] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:44,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:44,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365107668] [2023-12-02 15:34:44,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:44,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:44,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:44,195 INFO L87 Difference]: Start difference. First operand 500 states and 1323 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:44,487 INFO L93 Difference]: Finished difference Result 662 states and 1714 transitions. [2023-12-02 15:34:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:34:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 15:34:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:44,489 INFO L225 Difference]: With dead ends: 662 [2023-12-02 15:34:44,490 INFO L226 Difference]: Without dead ends: 662 [2023-12-02 15:34:44,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:44,490 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:44,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-12-02 15:34:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 461. [2023-12-02 15:34:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 459 states have (on average 2.6013071895424837) internal successors, (1194), 460 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1194 transitions. [2023-12-02 15:34:44,503 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1194 transitions. Word has length 26 [2023-12-02 15:34:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:44,503 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 1194 transitions. [2023-12-02 15:34:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1194 transitions. [2023-12-02 15:34:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:34:44,504 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:44,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:44,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:44,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:44,705 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:44,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:44,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1769056680, now seen corresponding path program 1 times [2023-12-02 15:34:44,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:44,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082498624] [2023-12-02 15:34:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:44,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:44,707 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:44,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 15:34:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:44,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:44,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:44,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:44,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:44,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082498624] [2023-12-02 15:34:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082498624] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:44,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [922519315] [2023-12-02 15:34:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:44,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:44,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:44,961 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:44,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2023-12-02 15:34:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:45,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:45,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:45,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:45,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [922519315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:45,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895788982] [2023-12-02 15:34:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:45,209 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:45,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 15:34:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:45,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:45,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:45,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:45,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895788982] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:45,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:34:45,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2023-12-02 15:34:45,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740160808] [2023-12-02 15:34:45,373 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:34:45,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:34:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:45,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:34:45,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:34:45,374 INFO L87 Difference]: Start difference. First operand 461 states and 1194 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:46,776 INFO L93 Difference]: Finished difference Result 1214 states and 3187 transitions. [2023-12-02 15:34:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 15:34:46,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 15:34:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:46,779 INFO L225 Difference]: With dead ends: 1214 [2023-12-02 15:34:46,779 INFO L226 Difference]: Without dead ends: 1214 [2023-12-02 15:34:46,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:34:46,780 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 278 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:46,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 144 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 15:34:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2023-12-02 15:34:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 500. [2023-12-02 15:34:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 498 states have (on average 2.5843373493975905) internal successors, (1287), 499 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1287 transitions. [2023-12-02 15:34:46,792 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1287 transitions. Word has length 28 [2023-12-02 15:34:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:46,792 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1287 transitions. [2023-12-02 15:34:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1287 transitions. [2023-12-02 15:34:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:34:46,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:46,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:46,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 15:34:46,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2023-12-02 15:34:47,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:47,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:47,394 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:47,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1651830396, now seen corresponding path program 2 times [2023-12-02 15:34:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096312506] [2023-12-02 15:34:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:34:47,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:47,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:47,395 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:47,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2023-12-02 15:34:47,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:34:47,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:47,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:47,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:47,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:47,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:47,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096312506] [2023-12-02 15:34:47,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096312506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:47,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205742772] [2023-12-02 15:34:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:34:47,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:47,749 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:47,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2023-12-02 15:34:47,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:34:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:47,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:47,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:48,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:48,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205742772] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:48,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069589514] [2023-12-02 15:34:48,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:34:48,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:48,044 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:48,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 15:34:48,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:34:48,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:34:48,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:34:48,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:48,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:49,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069589514] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:49,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2023-12-02 15:34:49,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6, 6, 6, 6] total 15 [2023-12-02 15:34:49,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416165844] [2023-12-02 15:34:49,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:49,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:34:49,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:34:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:34:49,116 INFO L87 Difference]: Start difference. First operand 500 states and 1287 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:52,717 INFO L93 Difference]: Finished difference Result 788 states and 2045 transitions. [2023-12-02 15:34:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:34:52,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 15:34:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:52,720 INFO L225 Difference]: With dead ends: 788 [2023-12-02 15:34:52,720 INFO L226 Difference]: Without dead ends: 788 [2023-12-02 15:34:52,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:34:52,720 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:52,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 75 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 15:34:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2023-12-02 15:34:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 548. [2023-12-02 15:34:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 546 states have (on average 2.587912087912088) internal successors, (1413), 547 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1413 transitions. [2023-12-02 15:34:52,731 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1413 transitions. Word has length 28 [2023-12-02 15:34:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:52,731 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 1413 transitions. [2023-12-02 15:34:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:34:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1413 transitions. [2023-12-02 15:34:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:34:52,732 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:52,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:52,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:52,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2023-12-02 15:34:53,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2023-12-02 15:34:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:53,333 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:34:53,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1789853467, now seen corresponding path program 1 times [2023-12-02 15:34:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:34:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697939804] [2023-12-02 15:34:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:53,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:34:53,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:34:53,335 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:34:53,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2023-12-02 15:34:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:53,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:34:53,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:53,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:53,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:34:53,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697939804] [2023-12-02 15:34:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697939804] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:53,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034966751] [2023-12-02 15:34:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:53,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:34:53,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:34:53,768 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:34:53,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2023-12-02 15:34:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:53,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:53,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:54,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:54,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1034966751] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:54,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365703087] [2023-12-02 15:34:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:54,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:54,368 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:54,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 15:34:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:54,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:54,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:54,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:34:54,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365703087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:54,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:34:54,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6, 6, 6, 6] total 21 [2023-12-02 15:34:54,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316872916] [2023-12-02 15:34:54,558 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:34:54,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 15:34:54,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:34:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 15:34:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:34:54,559 INFO L87 Difference]: Start difference. First operand 548 states and 1413 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:07,028 INFO L93 Difference]: Finished difference Result 2783 states and 6822 transitions. [2023-12-02 15:35:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-02 15:35:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 15:35:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:07,034 INFO L225 Difference]: With dead ends: 2783 [2023-12-02 15:35:07,034 INFO L226 Difference]: Without dead ends: 2639 [2023-12-02 15:35:07,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1429, Invalid=5711, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 15:35:07,037 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 950 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:07,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 477 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-12-02 15:35:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2023-12-02 15:35:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 869. [2023-12-02 15:35:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 867 states have (on average 2.809688581314879) internal successors, (2436), 868 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2436 transitions. [2023-12-02 15:35:07,067 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2436 transitions. Word has length 29 [2023-12-02 15:35:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:07,067 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 2436 transitions. [2023-12-02 15:35:07,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2436 transitions. [2023-12-02 15:35:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:35:07,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:07,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:07,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:07,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2023-12-02 15:35:07,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:07,670 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:35:07,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash -117723429, now seen corresponding path program 2 times [2023-12-02 15:35:07,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:07,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860144100] [2023-12-02 15:35:07,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:07,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:07,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:07,671 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:35:07,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2023-12-02 15:35:07,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:07,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:07,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:35:07,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:07,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:07,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860144100] [2023-12-02 15:35:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860144100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1176980712] [2023-12-02 15:35:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:07,963 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:07,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2023-12-02 15:35:08,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:08,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:35:08,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:08,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1176980712] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842001527] [2023-12-02 15:35:08,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:08,513 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:08,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 15:35:08,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:08,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:08,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:35:08,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:08,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:08,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842001527] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:08,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:35:08,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 6, 6, 6] total 17 [2023-12-02 15:35:08,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571349149] [2023-12-02 15:35:08,733 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:08,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 15:35:08,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 15:35:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-12-02 15:35:08,734 INFO L87 Difference]: Start difference. First operand 869 states and 2436 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:16,215 INFO L93 Difference]: Finished difference Result 3020 states and 7585 transitions. [2023-12-02 15:35:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-02 15:35:16,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 15:35:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:16,224 INFO L225 Difference]: With dead ends: 3020 [2023-12-02 15:35:16,224 INFO L226 Difference]: Without dead ends: 2984 [2023-12-02 15:35:16,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=924, Invalid=3768, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 15:35:16,226 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 707 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:16,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 459 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-02 15:35:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2023-12-02 15:35:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 1088. [2023-12-02 15:35:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1086 states have (on average 2.8802946593001844) internal successors, (3128), 1087 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3128 transitions. [2023-12-02 15:35:16,272 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3128 transitions. Word has length 29 [2023-12-02 15:35:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:16,273 INFO L495 AbstractCegarLoop]: Abstraction has 1088 states and 3128 transitions. [2023-12-02 15:35:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3128 transitions. [2023-12-02 15:35:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:35:16,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:16,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:16,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2023-12-02 15:35:16,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:16,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:16,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:16,875 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:35:16,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -281917539, now seen corresponding path program 3 times [2023-12-02 15:35:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721828626] [2023-12-02 15:35:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:35:16,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:16,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:16,877 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:35:16,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2023-12-02 15:35:17,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:35:17,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:17,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:35:17,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:17,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:17,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:17,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721828626] [2023-12-02 15:35:17,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721828626] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:17,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628142211] [2023-12-02 15:35:17,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:35:17,217 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:17,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:17,217 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:17,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2023-12-02 15:35:17,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:35:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:17,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:35:17,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:17,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:35:17,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628142211] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:35:17,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:35:17,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 15 [2023-12-02 15:35:17,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882739481] [2023-12-02 15:35:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:35:17,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:35:17,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:35:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:35:17,518 INFO L87 Difference]: Start difference. First operand 1088 states and 3128 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:17,759 INFO L93 Difference]: Finished difference Result 1124 states and 3157 transitions. [2023-12-02 15:35:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:35:17,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 15:35:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:17,763 INFO L225 Difference]: With dead ends: 1124 [2023-12-02 15:35:17,763 INFO L226 Difference]: Without dead ends: 1118 [2023-12-02 15:35:17,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:35:17,764 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:17,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:35:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2023-12-02 15:35:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1073. [2023-12-02 15:35:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1071 states have (on average 2.823529411764706) internal successors, (3024), 1072 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3024 transitions. [2023-12-02 15:35:17,781 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3024 transitions. Word has length 29 [2023-12-02 15:35:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:17,782 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 3024 transitions. [2023-12-02 15:35:17,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3024 transitions. [2023-12-02 15:35:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:35:17,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:17,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:17,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2023-12-02 15:35:17,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2023-12-02 15:35:18,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:18,185 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:35:18,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2091704723, now seen corresponding path program 1 times [2023-12-02 15:35:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:18,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723793482] [2023-12-02 15:35:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:18,186 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:35:18,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:35:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:18,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:35:18,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:18,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:18,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723793482] [2023-12-02 15:35:18,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723793482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:18,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [797226726] [2023-12-02 15:35:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:18,585 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:18,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:18,586 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:18,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2023-12-02 15:35:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:18,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:35:18,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:18,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [797226726] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:19,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403652114] [2023-12-02 15:35:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:19,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:19,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:19,265 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:19,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-12-02 15:35:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:19,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:35:19,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:19,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:19,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403652114] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:19,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:35:19,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6, 6, 6, 6] total 19 [2023-12-02 15:35:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924727545] [2023-12-02 15:35:19,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:19,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:35:19,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:35:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:35:19,514 INFO L87 Difference]: Start difference. First operand 1073 states and 3024 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:39,671 INFO L93 Difference]: Finished difference Result 5030 states and 13231 transitions. [2023-12-02 15:35:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-12-02 15:35:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 15:35:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:39,679 INFO L225 Difference]: With dead ends: 5030 [2023-12-02 15:35:39,679 INFO L226 Difference]: Without dead ends: 5012 [2023-12-02 15:35:39,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7508 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3161, Invalid=15471, Unknown=0, NotChecked=0, Total=18632 [2023-12-02 15:35:39,684 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 841 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:39,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 655 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2023-12-02 15:35:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2023-12-02 15:35:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 1649. [2023-12-02 15:35:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1647 states have (on average 3.045537340619308) internal successors, (5016), 1648 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5016 transitions. [2023-12-02 15:35:39,750 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5016 transitions. Word has length 30 [2023-12-02 15:35:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:39,750 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 5016 transitions. [2023-12-02 15:35:39,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5016 transitions. [2023-12-02 15:35:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:35:39,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:39,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:39,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:35:39,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:40,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:40,354 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:35:40,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 408912654, now seen corresponding path program 1 times [2023-12-02 15:35:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095023434] [2023-12-02 15:35:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:40,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:40,355 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:35:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:35:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:40,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:40,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:40,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:40,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:40,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095023434] [2023-12-02 15:35:40,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095023434] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:40,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [248788428] [2023-12-02 15:35:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:40,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:40,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:40,821 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2023-12-02 15:35:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:41,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:41,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:41,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:41,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [248788428] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337935429] [2023-12-02 15:35:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:35:41,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:41,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:41,132 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:41,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-12-02 15:35:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:35:41,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:41,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:41,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337935429] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:41,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:35:41,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 22 [2023-12-02 15:35:41,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236231624] [2023-12-02 15:35:41,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 15:35:41,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 15:35:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:35:41,864 INFO L87 Difference]: Start difference. First operand 1649 states and 5016 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:35:48,389 INFO L93 Difference]: Finished difference Result 2453 states and 6921 transitions. [2023-12-02 15:35:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 15:35:48,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 15:35:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:35:48,393 INFO L225 Difference]: With dead ends: 2453 [2023-12-02 15:35:48,393 INFO L226 Difference]: Without dead ends: 2453 [2023-12-02 15:35:48,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 15:35:48,395 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 660 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:35:48,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 454 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-02 15:35:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2023-12-02 15:35:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1766. [2023-12-02 15:35:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1764 states have (on average 2.9671201814058956) internal successors, (5234), 1765 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 5234 transitions. [2023-12-02 15:35:48,430 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 5234 transitions. Word has length 30 [2023-12-02 15:35:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:35:48,430 INFO L495 AbstractCegarLoop]: Abstraction has 1766 states and 5234 transitions. [2023-12-02 15:35:48,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:35:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 5234 transitions. [2023-12-02 15:35:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:35:48,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:35:48,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:35:48,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-12-02 15:35:48,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:48,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2023-12-02 15:35:49,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:49,034 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:35:49,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:35:49,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1580450334, now seen corresponding path program 2 times [2023-12-02 15:35:49,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:35:49,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066764178] [2023-12-02 15:35:49,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:49,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:35:49,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:35:49,035 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:35:49,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:35:49,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:49,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:49,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:35:49,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:49,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:50,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:35:50,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066764178] [2023-12-02 15:35:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066764178] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:50,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751564236] [2023-12-02 15:35:50,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:50,337 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:35:50,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:35:50,338 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:35:50,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2023-12-02 15:35:50,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:50,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:35:50,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:50,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:54,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751564236] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999543952] [2023-12-02 15:35:54,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:35:54,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:35:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:35:54,052 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:35:54,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-12-02 15:35:54,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:35:54,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:35:54,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:35:54,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:35:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:54,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:35:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:35:55,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999543952] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:35:55,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:35:55,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 11, 9, 9] total 30 [2023-12-02 15:35:55,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440845795] [2023-12-02 15:35:55,201 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:35:55,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 15:35:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:35:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 15:35:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2023-12-02 15:35:55,203 INFO L87 Difference]: Start difference. First operand 1766 states and 5234 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:36:36,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 15:37:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:37:52,760 INFO L93 Difference]: Finished difference Result 3431 states and 8930 transitions. [2023-12-02 15:37:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-12-02 15:37:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 15:37:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:37:52,765 INFO L225 Difference]: With dead ends: 3431 [2023-12-02 15:37:52,765 INFO L226 Difference]: Without dead ends: 3413 [2023-12-02 15:37:52,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5331 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=2887, Invalid=13115, Unknown=0, NotChecked=0, Total=16002 [2023-12-02 15:37:52,769 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1081 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 3324 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 3324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:37:52,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 1268 Invalid, 3511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 3324 Invalid, 0 Unknown, 0 Unchecked, 53.6s Time] [2023-12-02 15:37:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2023-12-02 15:37:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 1799. [2023-12-02 15:37:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1797 states have (on average 2.952698942682248) internal successors, (5306), 1798 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:37:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5306 transitions. [2023-12-02 15:37:52,810 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5306 transitions. Word has length 30 [2023-12-02 15:37:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:37:52,810 INFO L495 AbstractCegarLoop]: Abstraction has 1799 states and 5306 transitions. [2023-12-02 15:37:52,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:37:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5306 transitions. [2023-12-02 15:37:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:37:52,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:37:52,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:37:52,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2023-12-02 15:37:53,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:37:53,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-12-02 15:37:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:37:53,414 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:37:53,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:37:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1928379746, now seen corresponding path program 3 times [2023-12-02 15:37:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:37:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153105695] [2023-12-02 15:37:53,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:37:53,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:37:53,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:37:53,416 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:37:53,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:37:53,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:37:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:37:53,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:37:53,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:37:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:37:53,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:37:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:37:54,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:37:54,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153105695] [2023-12-02 15:37:54,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153105695] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:37:54,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [328543649] [2023-12-02 15:37:54,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:37:54,511 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:37:54,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:37:54,511 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:37:54,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2023-12-02 15:37:54,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:37:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:37:54,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:37:54,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:37:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:37:54,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:37:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:37:54,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [328543649] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:37:54,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330905941] [2023-12-02 15:37:54,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:37:54,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:37:54,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:37:54,996 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:37:54,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-12-02 15:37:55,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:37:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:37:55,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:37:55,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:37:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:37:55,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:37:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:37:56,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330905941] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:37:56,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:37:56,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 10, 9, 9] total 23 [2023-12-02 15:37:56,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6555773] [2023-12-02 15:37:56,230 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:37:56,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 15:37:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:37:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 15:37:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-12-02 15:37:56,232 INFO L87 Difference]: Start difference. First operand 1799 states and 5306 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:39:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:39:27,076 INFO L93 Difference]: Finished difference Result 3749 states and 9851 transitions. [2023-12-02 15:39:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-12-02 15:39:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 15:39:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:39:27,082 INFO L225 Difference]: With dead ends: 3749 [2023-12-02 15:39:27,082 INFO L226 Difference]: Without dead ends: 3659 [2023-12-02 15:39:27,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6286 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=2804, Invalid=13708, Unknown=0, NotChecked=0, Total=16512 [2023-12-02 15:39:27,084 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1042 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:39:27,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 758 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 43.3s Time] [2023-12-02 15:39:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2023-12-02 15:39:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 1868. [2023-12-02 15:39:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1866 states have (on average 2.9415862808145765) internal successors, (5489), 1867 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:39:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 5489 transitions. [2023-12-02 15:39:27,127 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 5489 transitions. Word has length 30 [2023-12-02 15:39:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:39:27,128 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 5489 transitions. [2023-12-02 15:39:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:39:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 5489 transitions. [2023-12-02 15:39:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:39:27,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:39:27,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:39:27,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2023-12-02 15:39:27,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:39:27,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-12-02 15:39:27,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:39:27,733 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:39:27,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:39:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1707304176, now seen corresponding path program 4 times [2023-12-02 15:39:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:39:27,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471058350] [2023-12-02 15:39:27,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:39:27,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:39:27,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:39:27,735 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:39:27,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:39:27,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:39:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:39:27,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:39:27,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:39:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:39:27,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:39:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:39:28,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:39:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471058350] [2023-12-02 15:39:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471058350] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:39:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524048852] [2023-12-02 15:39:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:39:28,761 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:39:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:39:28,762 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:39:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2023-12-02 15:39:28,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:39:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:39:28,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:39:28,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:39:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:39:29,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:39:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:39:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524048852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:39:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410113002] [2023-12-02 15:39:29,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:39:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:39:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:39:29,123 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:39:29,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-12-02 15:39:29,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:39:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:39:29,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:39:29,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:39:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:39:29,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:39:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:39:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410113002] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:39:31,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:39:31,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 22 [2023-12-02 15:39:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476402895] [2023-12-02 15:39:31,741 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:39:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 15:39:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:39:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 15:39:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:39:31,742 INFO L87 Difference]: Start difference. First operand 1868 states and 5489 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:40:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:41,201 INFO L93 Difference]: Finished difference Result 5063 states and 13307 transitions. [2023-12-02 15:40:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-02 15:40:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 15:40:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:41,208 INFO L225 Difference]: With dead ends: 5063 [2023-12-02 15:40:41,209 INFO L226 Difference]: Without dead ends: 5063 [2023-12-02 15:40:41,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1457, Invalid=4093, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 15:40:41,209 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 755 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:41,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 706 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2757 Invalid, 0 Unknown, 0 Unchecked, 56.3s Time] [2023-12-02 15:40:41,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2023-12-02 15:40:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 1913. [2023-12-02 15:40:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1911 states have (on average 2.95970695970696) internal successors, (5656), 1912 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:40:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 5656 transitions. [2023-12-02 15:40:41,277 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 5656 transitions. Word has length 30 [2023-12-02 15:40:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:41,277 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 5656 transitions. [2023-12-02 15:40:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:40:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 5656 transitions. [2023-12-02 15:40:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:40:41,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:41,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:41,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:41,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:41,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:40:41,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:40:41,883 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-12-02 15:40:41,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:41,883 INFO L85 PathProgramCache]: Analyzing trace with hash 202846059, now seen corresponding path program 2 times [2023-12-02 15:40:41,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:40:41,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321027494] [2023-12-02 15:40:41,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:40:41,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:40:41,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:40:41,884 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 15:40:41,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12102a17-8ae2-4b60-9b71-0bcea987afd0/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:40:42,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:40:42,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:42,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:40:42,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:42,700 INFO L349 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2023-12-02 15:40:42,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 203 treesize of output 99 [2023-12-02 15:40:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:40:42,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:46,554 INFO L349 Elim1Store]: treesize reduction 1015, result has 19.3 percent of original size [2023-12-02 15:40:46,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 996 treesize of output 395 [2023-12-02 15:45:28,803 WARN L293 SmtUtils]: Spent 46.97s on a formula simplification. DAG size of input: 7592 DAG size of output: 7598 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 15:45:48,227 WARN L293 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 6382 DAG size of output: 6380 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)