./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5 --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 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:59:24,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:59:24,133 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-21 18:59:24,139 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:59:24,139 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:59:24,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:59:24,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:59:24,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:59:24,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:59:24,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:59:24,172 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:59:24,173 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:59:24,173 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:59:24,174 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 18:59:24,175 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:59:24,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:59:24,176 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 18:59:24,176 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 18:59:24,177 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:59:24,178 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 18:59:24,178 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 18:59:24,179 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 18:59:24,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 18:59:24,180 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 18:59:24,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:59:24,182 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:59:24,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:59:24,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:59:24,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:59:24,187 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 18:59:24,187 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 18:59:24,188 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 18:59:24,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:59:24,189 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 18:59:24,189 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 18:59:24,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:59:24,190 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:59:24,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:59:24,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:59:24,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:59:24,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:24,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:59:24,193 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:59:24,193 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 18:59:24,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 18:59:24,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:59:24,195 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:59:24,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:59:24,195 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_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 [2023-11-21 18:59:24,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:59:24,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:59:24,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:59:24,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:59:24,501 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:59:24,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-21 18:59:27,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:59:27,868 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:59:27,869 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-21 18:59:27,878 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data/9d64d48e2/4d0d4ae5f5bb4707aa86dbb1bda64b06/FLAGa9bc631c7 [2023-11-21 18:59:27,893 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data/9d64d48e2/4d0d4ae5f5bb4707aa86dbb1bda64b06 [2023-11-21 18:59:27,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:59:27,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:59:27,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:27,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:59:27,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:59:27,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:27" (1/1) ... [2023-11-21 18:59:27,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55799cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:27, skipping insertion in model container [2023-11-21 18:59:27,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:27" (1/1) ... [2023-11-21 18:59:27,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:59:28,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:28,142 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-21 18:59:28,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60f631a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:28, skipping insertion in model container [2023-11-21 18:59:28,143 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:28,144 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 18:59:28,146 INFO L158 Benchmark]: Toolchain (without parser) took 246.56ms. Allocated memory is still 144.7MB. Free memory was 112.7MB in the beginning and 102.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 18:59:28,146 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 144.7MB. Free memory was 117.9MB in the beginning and 117.8MB in the end (delta: 85.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 18:59:28,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.91ms. Allocated memory is still 144.7MB. Free memory was 112.4MB in the beginning and 102.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 18:59:28,149 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 144.7MB. Free memory was 117.9MB in the beginning and 117.8MB in the end (delta: 85.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.91ms. Allocated memory is still 144.7MB. Free memory was 112.4MB in the beginning and 102.4MB 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: 124]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5 --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 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 18:59:30,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 18:59:30,794 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-21 18:59:30,800 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 18:59:30,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 18:59:30,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 18:59:30,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 18:59:30,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 18:59:30,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 18:59:30,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 18:59:30,851 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 18:59:30,852 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 18:59:30,853 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 18:59:30,853 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 18:59:30,854 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 18:59:30,855 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 18:59:30,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 18:59:30,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 18:59:30,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 18:59:30,857 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 18:59:30,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 18:59:30,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 18:59:30,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 18:59:30,860 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 18:59:30,860 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 18:59:30,861 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 18:59:30,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 18:59:30,862 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 18:59:30,862 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 18:59:30,863 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 18:59:30,863 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 18:59:30,864 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 18:59:30,864 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 18:59:30,865 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 18:59:30,865 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 18:59:30,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 18:59:30,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 18:59:30,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:30,867 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 18:59:30,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 18:59:30,868 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-21 18:59:30,869 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:30,869 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 18:59:30,870 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 18:59:30,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 18:59:30,871 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_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052a68c73a5d1c6e7122fc0c660c02483f37277d0239d876d93b351fcdd64a16 [2023-11-21 18:59:31,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 18:59:31,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 18:59:31,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 18:59:31,317 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 18:59:31,318 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 18:59:31,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-21 18:59:34,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 18:59:34,687 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 18:59:34,688 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2023-11-21 18:59:34,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data/a7e3d76cd/0c47c9326d7145e290996250df87b9a4/FLAG60dfc4cbd [2023-11-21 18:59:34,730 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/data/a7e3d76cd/0c47c9326d7145e290996250df87b9a4 [2023-11-21 18:59:34,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 18:59:34,740 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 18:59:34,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:34,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 18:59:34,751 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 18:59:34,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:34" (1/1) ... [2023-11-21 18:59:34,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360d9af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:34, skipping insertion in model container [2023-11-21 18:59:34,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 06:59:34" (1/1) ... [2023-11-21 18:59:34,780 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:59:35,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:35,081 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 18:59:35,100 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 18:59:35,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:35,163 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 18:59:35,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 18:59:35,224 INFO L206 MainTranslator]: Completed translation [2023-11-21 18:59:35,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35 WrapperNode [2023-11-21 18:59:35,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 18:59:35,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:35,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 18:59:35,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 18:59:35,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,327 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 209 [2023-11-21 18:59:35,327 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 18:59:35,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 18:59:35,328 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 18:59:35,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 18:59:35,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,385 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,404 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,406 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 18:59:35,416 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 18:59:35,416 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 18:59:35,416 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 18:59:35,417 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (1/1) ... [2023-11-21 18:59:35,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 18:59:35,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:35,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 18:59:35,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 18:59:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 18:59:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 18:59:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 18:59:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 18:59:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 18:59:35,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 18:59:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 18:59:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 18:59:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 18:59:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 18:59:35,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 18:59:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 18:59:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 18:59:35,523 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 18:59:35,785 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 18:59:35,790 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 18:59:36,620 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 18:59:37,093 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 18:59:37,094 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 18:59:37,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:37 BoogieIcfgContainer [2023-11-21 18:59:37,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 18:59:37,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 18:59:37,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 18:59:37,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 18:59:37,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 06:59:34" (1/3) ... [2023-11-21 18:59:37,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cf63dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:37, skipping insertion in model container [2023-11-21 18:59:37,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 06:59:35" (2/3) ... [2023-11-21 18:59:37,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cf63dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 06:59:37, skipping insertion in model container [2023-11-21 18:59:37,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 06:59:37" (3/3) ... [2023-11-21 18:59:37,106 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-11-21 18:59:37,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 18:59:37,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-21 18:59:37,130 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 18:59:37,228 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 18:59:37,263 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 77 transitions, 168 flow [2023-11-21 18:59:37,363 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1269 states, 1049 states have (on average 3.3412774070543376) internal successors, (3505), 1268 states have internal predecessors, (3505), 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) [2023-11-21 18:59:37,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 18:59:37,388 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;@3e5d17ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 18:59:37,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2023-11-21 18:59:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 1269 states, 1049 states have (on average 3.3412774070543376) internal successors, (3505), 1268 states have internal predecessors, (3505), 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) [2023-11-21 18:59:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:59:37,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:37,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:59:37,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:37,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 689198, now seen corresponding path program 1 times [2023-11-21 18:59:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487711996] [2023-11-21 18:59:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:37,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:37,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:37,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:37,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-21 18:59:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:37,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 18:59:37,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:37,616 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 [2023-11-21 18:59:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:37,639 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 11 treesize of output 1 [2023-11-21 18:59:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:37,665 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 [2023-11-21 18:59:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:37,677 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 11 treesize of output 1 [2023-11-21 18:59:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:37,689 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 [2023-11-21 18:59:37,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:37,696 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 [2023-11-21 18:59:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:37,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:37,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:37,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487711996] [2023-11-21 18:59:37,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487711996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:37,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:37,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:59:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407408026] [2023-11-21 18:59:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:37,779 INFO L87 Difference]: Start difference. First operand has 1269 states, 1049 states have (on average 3.3412774070543376) internal successors, (3505), 1268 states have internal predecessors, (3505), 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) [2023-11-21 18:59:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:38,028 INFO L93 Difference]: Finished difference Result 1266 states and 3502 transitions. [2023-11-21 18:59:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:38,031 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 [2023-11-21 18:59:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:38,058 INFO L225 Difference]: With dead ends: 1266 [2023-11-21 18:59:38,058 INFO L226 Difference]: Without dead ends: 1266 [2023-11-21 18:59:38,060 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 [2023-11-21 18:59:38,063 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:38,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2023-11-21 18:59:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1266. [2023-11-21 18:59:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1048 states have (on average 3.3416030534351147) internal successors, (3502), 1265 states have internal predecessors, (3502), 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) [2023-11-21 18:59:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 3502 transitions. [2023-11-21 18:59:38,189 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 3502 transitions. Word has length 3 [2023-11-21 18:59:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:38,189 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 3502 transitions. [2023-11-21 18:59:38,190 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) [2023-11-21 18:59:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 3502 transitions. [2023-11-21 18:59:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 18:59:38,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:38,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 18:59:38,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:38,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:38,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 689199, now seen corresponding path program 1 times [2023-11-21 18:59:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:38,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320488911] [2023-11-21 18:59:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:38,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:38,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:38,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-21 18:59:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:38,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 18:59:38,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:38,508 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 [2023-11-21 18:59:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:38,533 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 [2023-11-21 18:59:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:38,543 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 [2023-11-21 18:59:38,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:38,559 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 [2023-11-21 18:59:38,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:38,570 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 [2023-11-21 18:59:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:38,581 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 [2023-11-21 18:59:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:38,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:38,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320488911] [2023-11-21 18:59:38,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320488911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:38,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:38,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674858082] [2023-11-21 18:59:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:38,660 INFO L87 Difference]: Start difference. First operand 1266 states and 3502 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) [2023-11-21 18:59:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:39,226 INFO L93 Difference]: Finished difference Result 1268 states and 3504 transitions. [2023-11-21 18:59:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:39,227 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 [2023-11-21 18:59:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:39,245 INFO L225 Difference]: With dead ends: 1268 [2023-11-21 18:59:39,245 INFO L226 Difference]: Without dead ends: 1268 [2023-11-21 18:59:39,245 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 [2023-11-21 18:59:39,246 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:39,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 18:59:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2023-11-21 18:59:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1268. [2023-11-21 18:59:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1050 states have (on average 3.337142857142857) internal successors, (3504), 1267 states have internal predecessors, (3504), 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) [2023-11-21 18:59:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 3504 transitions. [2023-11-21 18:59:39,300 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 3504 transitions. Word has length 3 [2023-11-21 18:59:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:39,301 INFO L495 AbstractCegarLoop]: Abstraction has 1268 states and 3504 transitions. [2023-11-21 18:59:39,301 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) [2023-11-21 18:59:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 3504 transitions. [2023-11-21 18:59:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 18:59:39,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:39,302 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-21 18:59:39,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:59:39,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:39,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:39,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:39,503 INFO L85 PathProgramCache]: Analyzing trace with hash 662342504, now seen corresponding path program 1 times [2023-11-21 18:59:39,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:39,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153378088] [2023-11-21 18:59:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:39,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:39,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:39,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-21 18:59:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:39,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 18:59:39,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:39,624 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 [2023-11-21 18:59:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:39,640 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 [2023-11-21 18:59:39,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:39,650 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 [2023-11-21 18:59:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:39,663 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 [2023-11-21 18:59:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:39,689 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 [2023-11-21 18:59:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:39,704 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 [2023-11-21 18:59:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:39,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:40,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:40,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153378088] [2023-11-21 18:59:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153378088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [938637072] [2023-11-21 18:59:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:40,330 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:40,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:59:40,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:59:40,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-21 18:59:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:40,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:59:40,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:40,529 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 [2023-11-21 18:59:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:40,547 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 [2023-11-21 18:59:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:40,570 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 [2023-11-21 18:59:40,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:40,580 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 [2023-11-21 18:59:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:40,600 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 [2023-11-21 18:59:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:40,624 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 [2023-11-21 18:59:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:40,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:40,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [938637072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091151585] [2023-11-21 18:59:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:40,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:40,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:40,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:40,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 18:59:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:40,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 18:59:40,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:40,968 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 [2023-11-21 18:59:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:41,004 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 [2023-11-21 18:59:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:41,014 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 [2023-11-21 18:59:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:41,026 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 [2023-11-21 18:59:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:41,036 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 [2023-11-21 18:59:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:41,072 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 [2023-11-21 18:59:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:41,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091151585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:41,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:59:41,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-21 18:59:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449685420] [2023-11-21 18:59:41,280 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:41,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 18:59:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 18:59:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-21 18:59:41,281 INFO L87 Difference]: Start difference. First operand 1268 states and 3504 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) [2023-11-21 18:59:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:43,136 INFO L93 Difference]: Finished difference Result 1274 states and 3513 transitions. [2023-11-21 18:59:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 18:59:43,140 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 [2023-11-21 18:59:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:43,152 INFO L225 Difference]: With dead ends: 1274 [2023-11-21 18:59:43,152 INFO L226 Difference]: Without dead ends: 1274 [2023-11-21 18:59:43,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-21 18:59:43,153 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:43,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 179 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 18:59:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2023-11-21 18:59:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1274. [2023-11-21 18:59:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1056 states have (on average 3.3267045454545454) internal successors, (3513), 1273 states have internal predecessors, (3513), 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) [2023-11-21 18:59:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 3513 transitions. [2023-11-21 18:59:43,242 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 3513 transitions. Word has length 5 [2023-11-21 18:59:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:43,243 INFO L495 AbstractCegarLoop]: Abstraction has 1274 states and 3513 transitions. [2023-11-21 18:59:43,243 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) [2023-11-21 18:59:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 3513 transitions. [2023-11-21 18:59:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 18:59:43,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:43,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 18:59:43,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:43,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:43,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:43,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:43,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:43,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 662342543, now seen corresponding path program 1 times [2023-11-21 18:59:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:43,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386416690] [2023-11-21 18:59:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:43,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:43,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:43,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:43,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-21 18:59:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:43,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:43,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:43,978 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:59:43,979 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 [2023-11-21 18:59:44,015 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 18:59:44,016 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 [2023-11-21 18:59:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:44,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:44,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386416690] [2023-11-21 18:59:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386416690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:44,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:44,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:59:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567554995] [2023-11-21 18:59:44,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:44,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:44,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:44,129 INFO L87 Difference]: Start difference. First operand 1274 states and 3513 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) [2023-11-21 18:59:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:44,357 INFO L93 Difference]: Finished difference Result 1063 states and 2858 transitions. [2023-11-21 18:59:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:44,358 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 [2023-11-21 18:59:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:44,368 INFO L225 Difference]: With dead ends: 1063 [2023-11-21 18:59:44,368 INFO L226 Difference]: Without dead ends: 1063 [2023-11-21 18:59:44,369 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 [2023-11-21 18:59:44,370 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:44,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 19 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2023-11-21 18:59:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2023-11-21 18:59:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 903 states have (on average 3.16500553709856) internal successors, (2858), 1062 states have internal predecessors, (2858), 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) [2023-11-21 18:59:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2858 transitions. [2023-11-21 18:59:44,414 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2858 transitions. Word has length 5 [2023-11-21 18:59:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:44,414 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 2858 transitions. [2023-11-21 18:59:44,414 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) [2023-11-21 18:59:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2858 transitions. [2023-11-21 18:59:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 18:59:44,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:44,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 18:59:44,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:59:44,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:44,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:44,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:44,619 INFO L85 PathProgramCache]: Analyzing trace with hash 662342544, now seen corresponding path program 1 times [2023-11-21 18:59:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:44,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781393796] [2023-11-21 18:59:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:44,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:44,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:44,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-21 18:59:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:44,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 18:59:44,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:44,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:44,808 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 18:59:44,809 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 [2023-11-21 18:59:44,822 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 [2023-11-21 18:59:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:44,863 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 [2023-11-21 18:59:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:44,874 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 [2023-11-21 18:59:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:45,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:45,660 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781393796] [2023-11-21 18:59:45,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781393796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020546306] [2023-11-21 18:59:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:45,661 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:59:45,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:59:45,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-11-21 18:59:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:45,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 18:59:45,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:45,875 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 [2023-11-21 18:59:45,887 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 [2023-11-21 18:59:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:45,914 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 [2023-11-21 18:59:45,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:45,931 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 [2023-11-21 18:59:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:46,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2020546306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:46,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 18:59:46,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2023-11-21 18:59:46,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500858653] [2023-11-21 18:59:46,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:46,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:46,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:46,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-21 18:59:46,061 INFO L87 Difference]: Start difference. First operand 1063 states and 2858 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) [2023-11-21 18:59:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:46,379 INFO L93 Difference]: Finished difference Result 852 states and 2203 transitions. [2023-11-21 18:59:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:46,380 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 [2023-11-21 18:59:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:46,388 INFO L225 Difference]: With dead ends: 852 [2023-11-21 18:59:46,388 INFO L226 Difference]: Without dead ends: 852 [2023-11-21 18:59:46,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-21 18:59:46,390 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:46,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 18 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-11-21 18:59:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 852. [2023-11-21 18:59:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 750 states have (on average 2.937333333333333) internal successors, (2203), 851 states have internal predecessors, (2203), 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) [2023-11-21 18:59:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2203 transitions. [2023-11-21 18:59:46,424 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2203 transitions. Word has length 5 [2023-11-21 18:59:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:46,425 INFO L495 AbstractCegarLoop]: Abstraction has 852 states and 2203 transitions. [2023-11-21 18:59:46,425 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) [2023-11-21 18:59:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2203 transitions. [2023-11-21 18:59:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 18:59:46,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:46,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:46,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:59:46,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:46,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:46,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:46,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 767659231, now seen corresponding path program 1 times [2023-11-21 18:59:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:46,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432028837] [2023-11-21 18:59:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:46,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:46,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:46,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:46,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 [2023-11-21 18:59:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:46,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 18:59:46,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:46,974 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:59:46,974 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 [2023-11-21 18:59:46,995 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:59:46,995 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 [2023-11-21 18:59:47,025 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 18:59:47,025 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 [2023-11-21 18:59:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:47,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:47,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:47,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432028837] [2023-11-21 18:59:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432028837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:47,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:59:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249114295] [2023-11-21 18:59:47,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:47,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:47,166 INFO L87 Difference]: Start difference. First operand 852 states and 2203 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) [2023-11-21 18:59:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:47,362 INFO L93 Difference]: Finished difference Result 811 states and 2117 transitions. [2023-11-21 18:59:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:47,363 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 [2023-11-21 18:59:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:47,370 INFO L225 Difference]: With dead ends: 811 [2023-11-21 18:59:47,371 INFO L226 Difference]: Without dead ends: 811 [2023-11-21 18:59:47,371 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 [2023-11-21 18:59:47,372 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:47,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2023-11-21 18:59:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2023-11-21 18:59:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 731 states have (on average 2.896032831737346) internal successors, (2117), 810 states have internal predecessors, (2117), 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) [2023-11-21 18:59:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2117 transitions. [2023-11-21 18:59:47,405 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2117 transitions. Word has length 8 [2023-11-21 18:59:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:47,405 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 2117 transitions. [2023-11-21 18:59:47,405 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) [2023-11-21 18:59:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2117 transitions. [2023-11-21 18:59:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 18:59:47,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:47,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:47,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:47,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:47,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:47,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:47,610 INFO L85 PathProgramCache]: Analyzing trace with hash 767659232, now seen corresponding path program 1 times [2023-11-21 18:59:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:47,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618448360] [2023-11-21 18:59:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:47,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:47,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:47,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:47,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-21 18:59:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:47,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 18:59:47,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:47,751 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 [2023-11-21 18:59:47,755 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 10 treesize of output 8 [2023-11-21 18:59:47,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 18:59:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:47,783 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 [2023-11-21 18:59:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:47,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:47,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:47,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618448360] [2023-11-21 18:59:47,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618448360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:47,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:47,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 18:59:47,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813179152] [2023-11-21 18:59:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:47,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 18:59:47,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 18:59:47,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 18:59:47,824 INFO L87 Difference]: Start difference. First operand 811 states and 2117 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) [2023-11-21 18:59:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:48,051 INFO L93 Difference]: Finished difference Result 770 states and 2031 transitions. [2023-11-21 18:59:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 18:59:48,052 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 [2023-11-21 18:59:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:48,059 INFO L225 Difference]: With dead ends: 770 [2023-11-21 18:59:48,059 INFO L226 Difference]: Without dead ends: 770 [2023-11-21 18:59:48,059 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 [2023-11-21 18:59:48,060 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:48,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 18:59:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-11-21 18:59:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2023-11-21 18:59:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 712 states have (on average 2.8525280898876404) internal successors, (2031), 769 states have internal predecessors, (2031), 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) [2023-11-21 18:59:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2031 transitions. [2023-11-21 18:59:48,089 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2031 transitions. Word has length 8 [2023-11-21 18:59:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:48,090 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 2031 transitions. [2023-11-21 18:59:48,090 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) [2023-11-21 18:59:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2031 transitions. [2023-11-21 18:59:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 18:59:48,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:48,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:48,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:48,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:48,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1972308094, now seen corresponding path program 1 times [2023-11-21 18:59:48,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:48,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358930905] [2023-11-21 18:59:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:48,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:48,296 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:48,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-21 18:59:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:48,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 18:59:48,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:48,398 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 7 [2023-11-21 18:59:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:48,406 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 [2023-11-21 18:59:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:48,413 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 6 treesize of output 1 [2023-11-21 18:59:48,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:48,424 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 [2023-11-21 18:59:48,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:48,441 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 11 treesize of output 1 [2023-11-21 18:59:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:48,457 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 [2023-11-21 18:59:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 18:59:48,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 18:59:48,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:48,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358930905] [2023-11-21 18:59:48,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358930905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 18:59:48,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 18:59:48,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 18:59:48,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499465796] [2023-11-21 18:59:48,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 18:59:48,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 18:59:48,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 18:59:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 18:59:48,492 INFO L87 Difference]: Start difference. First operand 770 states and 2031 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) [2023-11-21 18:59:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:48,787 INFO L93 Difference]: Finished difference Result 500 states and 1319 transitions. [2023-11-21 18:59:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 18:59:48,788 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 [2023-11-21 18:59:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:48,792 INFO L225 Difference]: With dead ends: 500 [2023-11-21 18:59:48,792 INFO L226 Difference]: Without dead ends: 500 [2023-11-21 18:59:48,793 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 [2023-11-21 18:59:48,793 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:48,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 12 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 18:59:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-11-21 18:59:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2023-11-21 18:59:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 479 states have (on average 2.7536534446764094) internal successors, (1319), 499 states have internal predecessors, (1319), 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) [2023-11-21 18:59:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1319 transitions. [2023-11-21 18:59:48,812 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1319 transitions. Word has length 9 [2023-11-21 18:59:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:48,813 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1319 transitions. [2023-11-21 18:59:48,813 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) [2023-11-21 18:59:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1319 transitions. [2023-11-21 18:59:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 18:59:48,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:48,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 18:59:48,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-21 18:59:49,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:49,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:49,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1972308093, now seen corresponding path program 1 times [2023-11-21 18:59:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790739071] [2023-11-21 18:59:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:49,020 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:49,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-21 18:59:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:49,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 18:59:49,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:49,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:49,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-21 18:59:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:49,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790739071] [2023-11-21 18:59:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790739071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1179481431] [2023-11-21 18:59:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:59:49,562 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:59:49,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-11-21 18:59:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:49,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 18:59:49,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:49,749 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 [2023-11-21 18:59:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:49,768 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 [2023-11-21 18:59:49,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:49,779 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 [2023-11-21 18:59:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:49,791 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 [2023-11-21 18:59:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:49,803 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 [2023-11-21 18:59:49,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:49,811 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 [2023-11-21 18:59:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:50,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:50,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1179481431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:50,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736090079] [2023-11-21 18:59:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 18:59:50,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:50,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:50,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:50,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 18:59:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 18:59:50,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 18:59:50,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:50,840 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 [2023-11-21 18:59:50,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:50,856 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 [2023-11-21 18:59:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:50,865 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 [2023-11-21 18:59:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:50,875 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 [2023-11-21 18:59:50,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:50,896 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 [2023-11-21 18:59:50,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:50,908 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 [2023-11-21 18:59:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:51,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736090079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:51,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:59:51,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 16 [2023-11-21 18:59:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713531298] [2023-11-21 18:59:51,454 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 18:59:51,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 18:59:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-21 18:59:51,456 INFO L87 Difference]: Start difference. First operand 500 states and 1319 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) [2023-11-21 18:59:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 18:59:53,406 INFO L93 Difference]: Finished difference Result 1231 states and 3245 transitions. [2023-11-21 18:59:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 18:59:53,407 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 [2023-11-21 18:59:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 18:59:53,417 INFO L225 Difference]: With dead ends: 1231 [2023-11-21 18:59:53,417 INFO L226 Difference]: Without dead ends: 1231 [2023-11-21 18:59:53,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-21 18:59:53,420 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 143 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-21 18:59:53,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 67 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-21 18:59:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2023-11-21 18:59:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 662. [2023-11-21 18:59:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 641 states have (on average 2.8892355694227767) internal successors, (1852), 661 states have internal predecessors, (1852), 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) [2023-11-21 18:59:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1852 transitions. [2023-11-21 18:59:53,451 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1852 transitions. Word has length 9 [2023-11-21 18:59:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 18:59:53,451 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1852 transitions. [2023-11-21 18:59:53,452 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) [2023-11-21 18:59:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1852 transitions. [2023-11-21 18:59:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 18:59:53,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 18:59:53,454 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-21 18:59:53,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:53,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:53,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-21 18:59:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:54,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 18:59:54,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 18:59:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1854890899, now seen corresponding path program 2 times [2023-11-21 18:59:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 18:59:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437467350] [2023-11-21 18:59:54,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 18:59:54,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 18:59:54,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 18:59:54,059 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 18:59:54,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-21 18:59:54,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 18:59:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:59:54,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 18:59:54,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:54,178 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 [2023-11-21 18:59:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:54,192 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 [2023-11-21 18:59:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:54,208 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 [2023-11-21 18:59:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:54,233 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 [2023-11-21 18:59:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:54,246 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 [2023-11-21 18:59:54,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:54,255 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 [2023-11-21 18:59:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:54,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:55,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 18:59:55,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437467350] [2023-11-21 18:59:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437467350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:55,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382394950] [2023-11-21 18:59:55,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 18:59:55,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 18:59:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 18:59:55,609 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 18:59:55,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-21 18:59:55,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 18:59:55,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:59:55,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 18:59:55,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:55,833 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 [2023-11-21 18:59:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:55,850 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 [2023-11-21 18:59:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:55,858 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 [2023-11-21 18:59:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:55,869 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 [2023-11-21 18:59:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:55,881 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 [2023-11-21 18:59:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:55,888 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 [2023-11-21 18:59:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:56,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382394950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646932109] [2023-11-21 18:59:56,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 18:59:56,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 18:59:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 18:59:56,615 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 18:59:56,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-21 18:59:56,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 18:59:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 18:59:56,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 18:59:56,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 18:59:56,761 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 [2023-11-21 18:59:56,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:56,776 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 [2023-11-21 18:59:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:56,784 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 [2023-11-21 18:59:56,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:56,793 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 [2023-11-21 18:59:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:56,804 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 [2023-11-21 18:59:56,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 18:59:56,813 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 [2023-11-21 18:59:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:56,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 18:59:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 18:59:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646932109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 18:59:57,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 18:59:57,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 16 [2023-11-21 18:59:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055368075] [2023-11-21 18:59:57,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 18:59:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 18:59:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 18:59:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 18:59:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-11-21 18:59:57,337 INFO L87 Difference]: Start difference. First operand 662 states and 1852 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 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) [2023-11-21 19:00:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:01,885 INFO L93 Difference]: Finished difference Result 674 states and 1870 transitions. [2023-11-21 19:00:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 19:00:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 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 [2023-11-21 19:00:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:01,890 INFO L225 Difference]: With dead ends: 674 [2023-11-21 19:00:01,890 INFO L226 Difference]: Without dead ends: 674 [2023-11-21 19:00:01,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2023-11-21 19:00:01,892 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:01,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-21 19:00:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-21 19:00:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2023-11-21 19:00:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 653 states have (on average 2.8637059724349156) internal successors, (1870), 673 states have internal predecessors, (1870), 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) [2023-11-21 19:00:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1870 transitions. [2023-11-21 19:00:01,916 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1870 transitions. Word has length 11 [2023-11-21 19:00:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:01,920 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 1870 transitions. [2023-11-21 19:00:01,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 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) [2023-11-21 19:00:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1870 transitions. [2023-11-21 19:00:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 19:00:01,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:01,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:01,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:02,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:02,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:02,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt [2023-11-21 19:00:02,543 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 19:00:02,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1307476089, now seen corresponding path program 1 times [2023-11-21 19:00:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:00:02,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243283030] [2023-11-21 19:00:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:02,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:00:02,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:00:02,545 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:00:02,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-21 19:00:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:02,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 19:00:02,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:02,711 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 [2023-11-21 19:00:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:02,727 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 [2023-11-21 19:00:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:02,736 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 [2023-11-21 19:00:02,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:02,748 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 [2023-11-21 19:00:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:02,763 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 [2023-11-21 19:00:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:02,785 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 [2023-11-21 19:00:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:03,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:04,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:00:04,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243283030] [2023-11-21 19:00:04,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243283030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [833611176] [2023-11-21 19:00:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:00:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:00:04,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:00:04,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-11-21 19:00:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:04,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 19:00:04,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:04,422 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 [2023-11-21 19:00:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:04,440 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 [2023-11-21 19:00:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:04,449 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 [2023-11-21 19:00:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:04,460 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 [2023-11-21 19:00:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:04,468 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 [2023-11-21 19:00:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:04,480 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 [2023-11-21 19:00:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:04,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:05,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [833611176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:05,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363713075] [2023-11-21 19:00:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:05,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:05,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:05,285 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:05,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-21 19:00:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:05,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 19:00:05,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:05,447 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 13 treesize of output 7 [2023-11-21 19:00:05,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:05,461 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 8 treesize of output 1 [2023-11-21 19:00:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:05,491 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 [2023-11-21 19:00:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:05,503 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 [2023-11-21 19:00:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:05,517 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 [2023-11-21 19:00:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:05,524 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 [2023-11-21 19:00:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:05,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:00:06,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363713075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:06,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:00:06,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5, 5, 5, 5] total 13 [2023-11-21 19:00:06,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621867350] [2023-11-21 19:00:06,213 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:00:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 19:00:06,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:00:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 19:00:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:00:06,215 INFO L87 Difference]: Start difference. First operand 674 states and 1870 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) [2023-11-21 19:00:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:11,496 INFO L93 Difference]: Finished difference Result 1812 states and 5090 transitions. [2023-11-21 19:00:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:00:11,497 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 [2023-11-21 19:00:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:11,509 INFO L225 Difference]: With dead ends: 1812 [2023-11-21 19:00:11,509 INFO L226 Difference]: Without dead ends: 1812 [2023-11-21 19:00:11,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:00:11,510 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 194 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:11,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 97 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-21 19:00:11,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2023-11-21 19:00:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 919. [2023-11-21 19:00:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 898 states have (on average 2.9298440979955456) internal successors, (2631), 918 states have internal predecessors, (2631), 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) [2023-11-21 19:00:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2631 transitions. [2023-11-21 19:00:11,551 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2631 transitions. Word has length 11 [2023-11-21 19:00:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:11,551 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 2631 transitions. [2023-11-21 19:00:11,551 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) [2023-11-21 19:00:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2631 transitions. [2023-11-21 19:00:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 19:00:11,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:11,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:11,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:11,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:11,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:12,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:12,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 19:00:12,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash 666358008, now seen corresponding path program 1 times [2023-11-21 19:00:12,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:00:12,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196832953] [2023-11-21 19:00:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:12,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:00:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:00:12,172 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:00:12,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-21 19:00:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:12,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:00:12,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:12,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:12,689 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 [2023-11-21 19:00:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:12,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:00:12,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196832953] [2023-11-21 19:00:12,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196832953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:12,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283033019] [2023-11-21 19:00:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:12,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:00:12,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:00:12,814 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:00:12,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-11-21 19:00:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:12,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 19:00:12,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:13,000 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 [2023-11-21 19:00:13,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:13,014 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 [2023-11-21 19:00:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:13,032 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 [2023-11-21 19:00:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:13,052 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 [2023-11-21 19:00:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:13,061 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 [2023-11-21 19:00:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:13,077 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 [2023-11-21 19:00:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:13,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [283033019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:14,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933099304] [2023-11-21 19:00:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:14,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:14,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:14,103 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:14,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-21 19:00:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:14,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 19:00:14,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:14,256 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 [2023-11-21 19:00:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:14,281 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 [2023-11-21 19:00:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:14,293 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 [2023-11-21 19:00:14,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:14,301 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 [2023-11-21 19:00:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:14,312 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 [2023-11-21 19:00:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:14,322 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 [2023-11-21 19:00:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:14,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933099304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:14,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:00:14,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 16 [2023-11-21 19:00:14,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004882569] [2023-11-21 19:00:14,972 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:00:14,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 19:00:14,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:00:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 19:00:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:00:14,973 INFO L87 Difference]: Start difference. First operand 919 states and 2631 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) [2023-11-21 19:00:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:16,719 INFO L93 Difference]: Finished difference Result 1530 states and 4453 transitions. [2023-11-21 19:00:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:00:16,720 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 [2023-11-21 19:00:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:16,731 INFO L225 Difference]: With dead ends: 1530 [2023-11-21 19:00:16,731 INFO L226 Difference]: Without dead ends: 1530 [2023-11-21 19:00:16,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-11-21 19:00:16,732 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:16,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 67 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-21 19:00:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2023-11-21 19:00:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1249. [2023-11-21 19:00:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1228 states have (on average 3.026058631921824) internal successors, (3716), 1248 states have internal predecessors, (3716), 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) [2023-11-21 19:00:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3716 transitions. [2023-11-21 19:00:16,775 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3716 transitions. Word has length 12 [2023-11-21 19:00:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:16,776 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 3716 transitions. [2023-11-21 19:00:16,776 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) [2023-11-21 19:00:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3716 transitions. [2023-11-21 19:00:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 19:00:16,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:16,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:16,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:16,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:17,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-21 19:00:17,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:17,381 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-11-21 19:00:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash -817737470, now seen corresponding path program 1 times [2023-11-21 19:00:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-21 19:00:17,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102843303] [2023-11-21 19:00:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:17,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-21 19:00:17,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat [2023-11-21 19:00:17,384 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-21 19:00:17,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-21 19:00:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:17,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 19:00:17,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:17,526 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 [2023-11-21 19:00:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:17,536 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 [2023-11-21 19:00:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:17,544 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 [2023-11-21 19:00:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:17,554 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 [2023-11-21 19:00:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:17,573 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 [2023-11-21 19:00:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:17,582 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 [2023-11-21 19:00:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:17,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:18,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-21 19:00:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102843303] [2023-11-21 19:00:18,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102843303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1119664559] [2023-11-21 19:00:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:18,939 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-21 19:00:18,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 [2023-11-21 19:00:18,940 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-21 19:00:18,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-11-21 19:00:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:19,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 19:00:19,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:19,156 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 [2023-11-21 19:00:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:19,170 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 [2023-11-21 19:00:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:19,193 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 [2023-11-21 19:00:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:19,204 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 [2023-11-21 19:00:19,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:19,218 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 [2023-11-21 19:00:19,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:19,225 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 [2023-11-21 19:00:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:19,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:20,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1119664559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:20,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998997961] [2023-11-21 19:00:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:00:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:20,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:00:20,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acbbfd36-1441-4d3c-a56c-de99e5978c45/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-21 19:00:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:20,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-21 19:00:20,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:00:20,363 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 [2023-11-21 19:00:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:20,381 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 [2023-11-21 19:00:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:20,390 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 [2023-11-21 19:00:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:20,402 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 [2023-11-21 19:00:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:20,430 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 [2023-11-21 19:00:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:00:20,443 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 [2023-11-21 19:00:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:20,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:00:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:21,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998997961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:00:21,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-21 19:00:21,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5, 5, 5, 5] total 13 [2023-11-21 19:00:21,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364285570] [2023-11-21 19:00:21,318 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-21 19:00:21,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 19:00:21,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-21 19:00:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 19:00:21,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:00:21,320 INFO L87 Difference]: Start difference. First operand 1249 states and 3716 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)