./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:25:13,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:25:13,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:25:13,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:25:13,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:25:13,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:25:13,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:25:13,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:25:13,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:25:13,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:25:13,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:25:13,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:25:13,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:25:13,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:25:13,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:25:13,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:25:13,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:25:13,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:25:13,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:25:13,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:25:13,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:25:13,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:25:13,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:25:13,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:25:13,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:25:13,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:25:13,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:25:13,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:25:13,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:25:13,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:25:13,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:25:13,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:25:13,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:25:13,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:25:13,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:25:13,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:25:13,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:25:13,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:25:13,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:25:13,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:25:13,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:25:13,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:25:13,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:25:13,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:25:13,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:25:13,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:25:13,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:25:13,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:25:13,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:25:13,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:25:13,233 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:25:13,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:25:13,234 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:25:13,234 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:25:13,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:25:13,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:25:13,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:25:13,234 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:25:13,235 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:25:13,235 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:25:13,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:25:13,235 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:25:13,235 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:25:13,236 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:25:13,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:25:13,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:25:13,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:25:13,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:25:13,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:25:13,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:25:13,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:25:13,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:25:13,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2022-11-16 12:25:13,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:25:13,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:25:13,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:25:13,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:25:13,588 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:25:13,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-16 12:25:13,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/77d1d1bdc/6bfc31523957427482507293c7276ab2/FLAG0a1259634 [2022-11-16 12:25:14,095 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:25:14,096 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-16 12:25:14,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/77d1d1bdc/6bfc31523957427482507293c7276ab2/FLAG0a1259634 [2022-11-16 12:25:14,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/77d1d1bdc/6bfc31523957427482507293c7276ab2 [2022-11-16 12:25:14,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:25:14,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:25:14,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:25:14,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:25:14,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:25:14,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:25:14" (1/1) ... [2022-11-16 12:25:14,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b2980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:14, skipping insertion in model container [2022-11-16 12:25:14,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:25:14" (1/1) ... [2022-11-16 12:25:14,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:25:14,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:25:14,738 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-16 12:25:14,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:25:14,758 ERROR L326 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) [2022-11-16 12:25:14,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35acd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:14, skipping insertion in model container [2022-11-16 12:25:14,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:25:14,759 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 12:25:14,761 INFO L158 Benchmark]: Toolchain (without parser) took 265.15ms. Allocated memory is still 109.1MB. Free memory was 69.5MB in the beginning and 84.7MB in the end (delta: -15.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 12:25:14,762 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 86.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:25:14,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.35ms. Allocated memory is still 109.1MB. Free memory was 69.3MB in the beginning and 85.0MB in the end (delta: -15.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:25:14,765 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 86.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.35ms. Allocated memory is still 109.1MB. Free memory was 69.3MB in the beginning and 85.0MB in the end (delta: -15.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:25:16,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:25:17,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:25:17,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:25:17,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:25:17,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:25:17,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:25:17,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:25:17,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:25:17,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:25:17,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:25:17,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:25:17,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:25:17,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:25:17,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:25:17,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:25:17,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:25:17,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:25:17,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:25:17,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:25:17,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:25:17,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:25:17,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:25:17,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:25:17,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:25:17,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:25:17,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:25:17,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:25:17,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:25:17,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:25:17,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:25:17,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:25:17,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:25:17,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:25:17,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:25:17,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:25:17,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:25:17,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:25:17,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:25:17,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:25:17,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:25:17,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 12:25:17,133 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:25:17,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:25:17,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:25:17,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:25:17,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:25:17,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:25:17,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:25:17,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:25:17,138 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:25:17,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:25:17,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:25:17,140 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:25:17,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:25:17,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:25:17,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:25:17,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:25:17,141 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:25:17,141 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:25:17,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:25:17,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:25:17,141 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:25:17,142 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:25:17,142 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:25:17,142 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:25:17,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:25:17,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:25:17,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:25:17,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:25:17,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:25:17,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:25:17,144 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:25:17,144 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:25:17,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:25:17,144 INFO L138 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_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2022-11-16 12:25:17,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:25:17,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:25:17,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:25:17,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:25:17,554 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:25:17,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-16 12:25:17,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/114c4b574/22324968d56f4212ad0bce35baf5a9ad/FLAGca720ee45 [2022-11-16 12:25:18,245 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:25:18,250 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-16 12:25:18,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/114c4b574/22324968d56f4212ad0bce35baf5a9ad/FLAGca720ee45 [2022-11-16 12:25:18,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/data/114c4b574/22324968d56f4212ad0bce35baf5a9ad [2022-11-16 12:25:18,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:25:18,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:25:18,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:25:18,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:25:18,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:25:18,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:25:18" (1/1) ... [2022-11-16 12:25:18,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e10638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:18, skipping insertion in model container [2022-11-16 12:25:18,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:25:18" (1/1) ... [2022-11-16 12:25:18,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:25:18,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:25:18,943 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-16 12:25:18,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:25:18,976 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 12:25:18,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:25:18,994 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-16 12:25:19,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:25:19,005 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:25:19,035 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-16 12:25:19,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:25:19,078 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:25:19,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19 WrapperNode [2022-11-16 12:25:19,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:25:19,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:25:19,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:25:19,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:25:19,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,165 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 259 [2022-11-16 12:25:19,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:25:19,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:25:19,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:25:19,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:25:19,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,198 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:25:19,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:25:19,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:25:19,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:25:19,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (1/1) ... [2022-11-16 12:25:19,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:25:19,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:19,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:25:19,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:25:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:25:19,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:25:19,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:25:19,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:25:19,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:25:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:25:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:25:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:25:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:25:19,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:25:19,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:25:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:25:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:25:19,292 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:25:19,494 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:25:19,512 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:25:20,250 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:25:20,260 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:25:20,261 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:25:20,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:25:20 BoogieIcfgContainer [2022-11-16 12:25:20,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:25:20,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:25:20,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:25:20,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:25:20,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:25:18" (1/3) ... [2022-11-16 12:25:20,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288f667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:25:20, skipping insertion in model container [2022-11-16 12:25:20,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:25:19" (2/3) ... [2022-11-16 12:25:20,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288f667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:25:20, skipping insertion in model container [2022-11-16 12:25:20,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:25:20" (3/3) ... [2022-11-16 12:25:20,271 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2022-11-16 12:25:20,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:25:20,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-16 12:25:20,298 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:25:20,446 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:25:20,485 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:25:20,501 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 404 transitions, 824 flow [2022-11-16 12:25:20,512 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 404 transitions, 824 flow [2022-11-16 12:25:20,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 404 transitions, 824 flow [2022-11-16 12:25:20,695 INFO L130 PetriNetUnfolder]: 28/402 cut-off events. [2022-11-16 12:25:20,696 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:25:20,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 402 events. 28/402 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1029 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2022-11-16 12:25:20,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 40920 [2022-11-16 12:26:10,325 INFO L134 LiptonReduction]: Checked pairs total: 38774 [2022-11-16 12:26:10,325 INFO L136 LiptonReduction]: Total number of compositions: 516 [2022-11-16 12:26:10,333 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 44 transitions, 104 flow [2022-11-16 12:26:10,373 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 402 states, 222 states have (on average 4.824324324324325) internal successors, (1071), 401 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:10,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:26:10,397 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;@3d1ee576, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:26:10,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-16 12:26:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 402 states, 222 states have (on average 4.824324324324325) internal successors, (1071), 401 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:26:10,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:10,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:26:10,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash 55388, now seen corresponding path program 1 times [2022-11-16 12:26:10,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230894966] [2022-11-16 12:26:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:10,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:10,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:10,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:26:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:10,746 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 12:26:10,747 INFO L350 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 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-16 12:26:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:10,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:10,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:10,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230894966] [2022-11-16 12:26:10,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230894966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:10,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:10,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158043203] [2022-11-16 12:26:10,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:10,851 INFO L87 Difference]: Start difference. First operand has 402 states, 222 states have (on average 4.824324324324325) internal successors, (1071), 401 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:11,036 INFO L93 Difference]: Finished difference Result 146 states and 379 transitions. [2022-11-16 12:26:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:26:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:11,049 INFO L225 Difference]: With dead ends: 146 [2022-11-16 12:26:11,050 INFO L226 Difference]: Without dead ends: 146 [2022-11-16 12:26:11,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:11,053 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:11,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-16 12:26:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-16 12:26:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-16 12:26:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 103 states have (on average 3.679611650485437) internal successors, (379), 145 states have internal predecessors, (379), 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) [2022-11-16 12:26:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 379 transitions. [2022-11-16 12:26:11,099 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 379 transitions. Word has length 2 [2022-11-16 12:26:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:11,100 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 379 transitions. [2022-11-16 12:26:11,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 379 transitions. [2022-11-16 12:26:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:26:11,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:11,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:26:11,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:11,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 55389, now seen corresponding path program 1 times [2022-11-16 12:26:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141062966] [2022-11-16 12:26:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:11,315 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 [2022-11-16 12:26:11,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:11,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:11,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:26:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:11,462 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:26:11,463 INFO L350 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 12 treesize of output 20 [2022-11-16 12:26:11,481 INFO L350 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 [2022-11-16 12:26:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:11,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:11,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:11,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141062966] [2022-11-16 12:26:11,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141062966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:11,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:11,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:11,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211523301] [2022-11-16 12:26:11,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:11,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:11,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:11,523 INFO L87 Difference]: Start difference. First operand 146 states and 379 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:11,714 INFO L93 Difference]: Finished difference Result 146 states and 378 transitions. [2022-11-16 12:26:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:26:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:11,716 INFO L225 Difference]: With dead ends: 146 [2022-11-16 12:26:11,716 INFO L226 Difference]: Without dead ends: 146 [2022-11-16 12:26:11,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:11,718 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-16 12:26:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-16 12:26:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-16 12:26:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 103 states have (on average 3.6699029126213594) internal successors, (378), 145 states have internal predecessors, (378), 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) [2022-11-16 12:26:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 378 transitions. [2022-11-16 12:26:11,734 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 378 transitions. Word has length 2 [2022-11-16 12:26:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:11,735 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 378 transitions. [2022-11-16 12:26:11,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 378 transitions. [2022-11-16 12:26:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:26:11,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:11,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:26:11,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:11,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash 54935, now seen corresponding path program 1 times [2022-11-16 12:26:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335394632] [2022-11-16 12:26:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:11,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:11,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:26:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:12,053 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 12:26:12,054 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 12:26:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:12,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:12,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:12,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335394632] [2022-11-16 12:26:12,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335394632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:12,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:12,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72834503] [2022-11-16 12:26:12,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:12,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:12,067 INFO L87 Difference]: Start difference. First operand 146 states and 378 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:12,260 INFO L93 Difference]: Finished difference Result 145 states and 376 transitions. [2022-11-16 12:26:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:26:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:12,263 INFO L225 Difference]: With dead ends: 145 [2022-11-16 12:26:12,263 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 12:26:12,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:12,264 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:12,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:26:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 12:26:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-16 12:26:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 103 states have (on average 3.650485436893204) internal successors, (376), 144 states have internal predecessors, (376), 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) [2022-11-16 12:26:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 376 transitions. [2022-11-16 12:26:12,274 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 376 transitions. Word has length 2 [2022-11-16 12:26:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:12,275 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 376 transitions. [2022-11-16 12:26:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 376 transitions. [2022-11-16 12:26:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:26:12,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:12,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:26:12,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-16 12:26:12,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:12,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 54936, now seen corresponding path program 1 times [2022-11-16 12:26:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586891643] [2022-11-16 12:26:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:12,501 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 [2022-11-16 12:26:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:12,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:12,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 12:26:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:12,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:26:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:12,701 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:12,702 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:12,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:12,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586891643] [2022-11-16 12:26:12,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586891643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:12,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:12,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:12,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205763407] [2022-11-16 12:26:12,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:12,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:12,738 INFO L87 Difference]: Start difference. First operand 145 states and 376 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:13,198 INFO L93 Difference]: Finished difference Result 284 states and 742 transitions. [2022-11-16 12:26:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:13,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:26:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:13,203 INFO L225 Difference]: With dead ends: 284 [2022-11-16 12:26:13,203 INFO L226 Difference]: Without dead ends: 284 [2022-11-16 12:26:13,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:13,205 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:13,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:26:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-16 12:26:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 145. [2022-11-16 12:26:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 103 states have (on average 3.6407766990291264) internal successors, (375), 144 states have internal predecessors, (375), 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) [2022-11-16 12:26:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 375 transitions. [2022-11-16 12:26:13,217 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 375 transitions. Word has length 2 [2022-11-16 12:26:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:13,218 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 375 transitions. [2022-11-16 12:26:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:26:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 375 transitions. [2022-11-16 12:26:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:26:13,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:13,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:26:13,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:13,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:13,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1714911, now seen corresponding path program 1 times [2022-11-16 12:26:13,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:13,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115537390] [2022-11-16 12:26:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:13,432 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 [2022-11-16 12:26:13,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:13,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:13,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 12:26:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:13,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:26:13,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:13,568 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-16 12:26:13,569 INFO L350 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 12:26:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:26:13,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:13,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115537390] [2022-11-16 12:26:13,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115537390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:13,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:13,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701318573] [2022-11-16 12:26:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:13,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:13,594 INFO L87 Difference]: Start difference. First operand 145 states and 375 transitions. 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) [2022-11-16 12:26:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:13,797 INFO L93 Difference]: Finished difference Result 120 states and 298 transitions. [2022-11-16 12:26:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:13,797 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 [2022-11-16 12:26:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:13,798 INFO L225 Difference]: With dead ends: 120 [2022-11-16 12:26:13,798 INFO L226 Difference]: Without dead ends: 120 [2022-11-16 12:26:13,799 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 [2022-11-16 12:26:13,799 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:13,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:26:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-16 12:26:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-16 12:26:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 3.3863636363636362) internal successors, (298), 119 states have internal predecessors, (298), 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) [2022-11-16 12:26:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 298 transitions. [2022-11-16 12:26:13,807 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 298 transitions. Word has length 3 [2022-11-16 12:26:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:13,808 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 298 transitions. [2022-11-16 12:26:13,808 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) [2022-11-16 12:26:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 298 transitions. [2022-11-16 12:26:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:26:13,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:13,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:26:13,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:14,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1714912, now seen corresponding path program 1 times [2022-11-16 12:26:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:14,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926522884] [2022-11-16 12:26:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:14,022 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 [2022-11-16 12:26:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:14,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:14,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:26:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:14,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:14,195 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 12:26:14,196 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 24 [2022-11-16 12:26:14,222 INFO L350 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 [2022-11-16 12:26:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:14,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:14,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:14,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926522884] [2022-11-16 12:26:14,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926522884] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:26:14,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:26:14,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-16 12:26:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287635219] [2022-11-16 12:26:14,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:14,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:14,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:14,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:26:14,463 INFO L87 Difference]: Start difference. First operand 120 states and 298 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) [2022-11-16 12:26:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:14,725 INFO L93 Difference]: Finished difference Result 95 states and 221 transitions. [2022-11-16 12:26:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:14,725 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 [2022-11-16 12:26:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:14,726 INFO L225 Difference]: With dead ends: 95 [2022-11-16 12:26:14,726 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 12:26:14,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:26:14,727 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:14,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:26:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 12:26:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-16 12:26:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 3.0273972602739727) internal successors, (221), 94 states have internal predecessors, (221), 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) [2022-11-16 12:26:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 221 transitions. [2022-11-16 12:26:14,733 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 221 transitions. Word has length 3 [2022-11-16 12:26:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:14,733 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 221 transitions. [2022-11-16 12:26:14,734 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) [2022-11-16 12:26:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 221 transitions. [2022-11-16 12:26:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:26:14,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:14,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:26:14,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:14,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:14,940 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1714459, now seen corresponding path program 1 times [2022-11-16 12:26:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:14,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430392901] [2022-11-16 12:26:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:14,941 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 [2022-11-16 12:26:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:14,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:14,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:15,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:26:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:15,101 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:15,101 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:15,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:15,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430392901] [2022-11-16 12:26:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430392901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:15,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:15,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:26:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983329291] [2022-11-16 12:26:15,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:26:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:26:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:26:15,439 INFO L87 Difference]: Start difference. First operand 95 states and 221 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-16 12:26:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:16,154 INFO L93 Difference]: Finished difference Result 280 states and 657 transitions. [2022-11-16 12:26:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:26:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 [2022-11-16 12:26:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:16,157 INFO L225 Difference]: With dead ends: 280 [2022-11-16 12:26:16,157 INFO L226 Difference]: Without dead ends: 280 [2022-11-16 12:26:16,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:26:16,158 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:16,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:26:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-16 12:26:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 98. [2022-11-16 12:26:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 2.986842105263158) internal successors, (227), 97 states have internal predecessors, (227), 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) [2022-11-16 12:26:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 227 transitions. [2022-11-16 12:26:16,166 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 227 transitions. Word has length 3 [2022-11-16 12:26:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:16,166 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 227 transitions. [2022-11-16 12:26:16,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-16 12:26:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 227 transitions. [2022-11-16 12:26:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:26:16,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:16,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:26:16,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:16,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:16,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash 53265338, now seen corresponding path program 1 times [2022-11-16 12:26:16,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:16,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320337379] [2022-11-16 12:26:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:16,380 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 [2022-11-16 12:26:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:16,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:16,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 12:26:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:16,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:26:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:16,504 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 12:26:16,504 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 12:26:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:16,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:16,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320337379] [2022-11-16 12:26:16,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320337379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:16,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:16,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:26:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008165620] [2022-11-16 12:26:16,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:16,535 INFO L87 Difference]: Start difference. First operand 98 states and 227 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-16 12:26:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:16,776 INFO L93 Difference]: Finished difference Result 72 states and 164 transitions. [2022-11-16 12:26:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:26:16,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-16 12:26:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:16,778 INFO L225 Difference]: With dead ends: 72 [2022-11-16 12:26:16,778 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 12:26:16,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:16,779 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:16,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:26:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 12:26:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-16 12:26:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 71 states have internal predecessors, (164), 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) [2022-11-16 12:26:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 164 transitions. [2022-11-16 12:26:16,783 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 164 transitions. Word has length 4 [2022-11-16 12:26:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:16,783 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 164 transitions. [2022-11-16 12:26:16,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-16 12:26:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 164 transitions. [2022-11-16 12:26:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:26:16,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:16,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:26:16,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:17,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash 53265514, now seen corresponding path program 1 times [2022-11-16 12:26:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3424022] [2022-11-16 12:26:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:17,006 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 [2022-11-16 12:26:17,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:17,007 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:17,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:26:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:17,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:17,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:17,133 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:26:17,133 INFO L350 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 12 treesize of output 20 [2022-11-16 12:26:17,140 INFO L350 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 14 treesize of output 12 [2022-11-16 12:26:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:17,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:17,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3424022] [2022-11-16 12:26:17,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3424022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:17,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:17,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:17,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111902465] [2022-11-16 12:26:17,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:17,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:17,186 INFO L87 Difference]: Start difference. First operand 72 states and 164 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 12:26:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:17,366 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2022-11-16 12:26:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-16 12:26:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:17,368 INFO L225 Difference]: With dead ends: 64 [2022-11-16 12:26:17,368 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 12:26:17,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:17,369 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:17,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:26:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 12:26:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-16 12:26:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 2.672727272727273) internal successors, (147), 63 states have internal predecessors, (147), 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) [2022-11-16 12:26:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 147 transitions. [2022-11-16 12:26:17,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 147 transitions. Word has length 4 [2022-11-16 12:26:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:17,372 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 147 transitions. [2022-11-16 12:26:17,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 12:26:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 147 transitions. [2022-11-16 12:26:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:26:17,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:17,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:26:17,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:17,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:17,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 53265339, now seen corresponding path program 1 times [2022-11-16 12:26:17,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:17,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291068647] [2022-11-16 12:26:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:17,590 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 [2022-11-16 12:26:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:17,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:17,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:26:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:17,763 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:17,763 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:17,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:17,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291068647] [2022-11-16 12:26:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291068647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:17,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:17,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:26:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637066462] [2022-11-16 12:26:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:17,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:17,868 INFO L87 Difference]: Start difference. First operand 64 states and 147 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-16 12:26:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:18,211 INFO L93 Difference]: Finished difference Result 111 states and 260 transitions. [2022-11-16 12:26:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:26:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-16 12:26:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:18,213 INFO L225 Difference]: With dead ends: 111 [2022-11-16 12:26:18,213 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 12:26:18,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:18,214 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:18,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:26:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 12:26:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2022-11-16 12:26:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 2.90625) internal successors, (186), 72 states have internal predecessors, (186), 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) [2022-11-16 12:26:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 186 transitions. [2022-11-16 12:26:18,219 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 186 transitions. Word has length 4 [2022-11-16 12:26:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:18,219 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 186 transitions. [2022-11-16 12:26:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-16 12:26:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 186 transitions. [2022-11-16 12:26:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:26:18,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:18,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:26:18,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-16 12:26:18,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:18,432 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash 53265515, now seen corresponding path program 1 times [2022-11-16 12:26:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:18,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366774424] [2022-11-16 12:26:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:18,433 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 [2022-11-16 12:26:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:18,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:18,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:26:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:18,560 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 12:26:18,560 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-16 12:26:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:18,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:18,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:18,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366774424] [2022-11-16 12:26:18,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366774424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:18,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:18,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:18,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442502280] [2022-11-16 12:26:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:18,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:18,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:18,585 INFO L87 Difference]: Start difference. First operand 73 states and 186 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 12:26:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:18,755 INFO L93 Difference]: Finished difference Result 64 states and 165 transitions. [2022-11-16 12:26:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-16 12:26:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:18,756 INFO L225 Difference]: With dead ends: 64 [2022-11-16 12:26:18,756 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 12:26:18,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:18,757 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:18,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:26:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 12:26:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-16 12:26:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 63 states have internal predecessors, (165), 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) [2022-11-16 12:26:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2022-11-16 12:26:18,761 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 4 [2022-11-16 12:26:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:18,762 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2022-11-16 12:26:18,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 12:26:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2022-11-16 12:26:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:18,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:18,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:26:18,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:18,974 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -351411290, now seen corresponding path program 1 times [2022-11-16 12:26:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026602062] [2022-11-16 12:26:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:18,976 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 [2022-11-16 12:26:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:18,977 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:18,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:26:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:19,151 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:19,151 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:19,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:19,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026602062] [2022-11-16 12:26:19,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026602062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:19,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:19,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:26:19,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138158492] [2022-11-16 12:26:19,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:19,274 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-16 12:26:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:19,610 INFO L93 Difference]: Finished difference Result 94 states and 247 transitions. [2022-11-16 12:26:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:26:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-16 12:26:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:19,611 INFO L225 Difference]: With dead ends: 94 [2022-11-16 12:26:19,611 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 12:26:19,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:19,612 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:19,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:26:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 12:26:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2022-11-16 12:26:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 3.0) internal successors, (219), 77 states have internal predecessors, (219), 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) [2022-11-16 12:26:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 219 transitions. [2022-11-16 12:26:19,616 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 219 transitions. Word has length 6 [2022-11-16 12:26:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:19,616 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 219 transitions. [2022-11-16 12:26:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-16 12:26:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 219 transitions. [2022-11-16 12:26:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:19,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:19,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:26:19,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:19,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:19,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash -351257398, now seen corresponding path program 1 times [2022-11-16 12:26:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692396878] [2022-11-16 12:26:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:19,828 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 [2022-11-16 12:26:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:19,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:19,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 12:26:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:19,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:26:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:20,014 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:20,014 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:20,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:20,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692396878] [2022-11-16 12:26:20,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692396878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:20,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:20,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:20,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085162925] [2022-11-16 12:26:20,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:20,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:20,144 INFO L87 Difference]: Start difference. First operand 78 states and 219 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-16 12:26:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:20,382 INFO L93 Difference]: Finished difference Result 80 states and 223 transitions. [2022-11-16 12:26:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-16 12:26:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:20,384 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:26:20,384 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:26:20,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:20,385 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:20,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-16 12:26:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:26:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 12:26:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 2.973333333333333) internal successors, (223), 79 states have internal predecessors, (223), 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) [2022-11-16 12:26:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 223 transitions. [2022-11-16 12:26:20,389 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 223 transitions. Word has length 6 [2022-11-16 12:26:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:20,389 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 223 transitions. [2022-11-16 12:26:20,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-16 12:26:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 223 transitions. [2022-11-16 12:26:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:20,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:20,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:26:20,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:20,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash -351299527, now seen corresponding path program 1 times [2022-11-16 12:26:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634111603] [2022-11-16 12:26:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:20,592 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 [2022-11-16 12:26:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:20,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:20,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 12:26:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:26:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:20,784 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:20,784 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:20,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:20,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634111603] [2022-11-16 12:26:20,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634111603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:20,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:20,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154471684] [2022-11-16 12:26:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:20,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:20,942 INFO L87 Difference]: Start difference. First operand 80 states and 223 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-16 12:26:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:21,171 INFO L93 Difference]: Finished difference Result 80 states and 222 transitions. [2022-11-16 12:26:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:21,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-16 12:26:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:21,173 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:26:21,173 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:26:21,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:21,174 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:21,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-16 12:26:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:26:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 12:26:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 2.96) internal successors, (222), 79 states have internal predecessors, (222), 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) [2022-11-16 12:26:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 222 transitions. [2022-11-16 12:26:21,179 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 222 transitions. Word has length 6 [2022-11-16 12:26:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:21,179 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 222 transitions. [2022-11-16 12:26:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-16 12:26:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 222 transitions. [2022-11-16 12:26:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:21,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:21,180 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 12:26:21,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:21,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:21,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash -452796584, now seen corresponding path program 2 times [2022-11-16 12:26:21,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:21,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961606986] [2022-11-16 12:26:21,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:26:21,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:21,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:21,395 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:21,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:26:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:26:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:21,600 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:21,600 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:21,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:22,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961606986] [2022-11-16 12:26:22,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961606986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:22,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:22,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:26:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798662659] [2022-11-16 12:26:22,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:22,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:26:22,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:26:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:26:22,536 INFO L87 Difference]: Start difference. First operand 80 states and 222 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-16 12:26:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:27,130 INFO L93 Difference]: Finished difference Result 719 states and 2082 transitions. [2022-11-16 12:26:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:26:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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 6 [2022-11-16 12:26:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:27,136 INFO L225 Difference]: With dead ends: 719 [2022-11-16 12:26:27,136 INFO L226 Difference]: Without dead ends: 719 [2022-11-16 12:26:27,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:26:27,137 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 612 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:27,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 0 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 12:26:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-16 12:26:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 86. [2022-11-16 12:26:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 2.888888888888889) internal successors, (234), 85 states have internal predecessors, (234), 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) [2022-11-16 12:26:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 234 transitions. [2022-11-16 12:26:27,148 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 234 transitions. Word has length 6 [2022-11-16 12:26:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:27,148 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 234 transitions. [2022-11-16 12:26:27,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-16 12:26:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 234 transitions. [2022-11-16 12:26:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:26:27,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:27,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:27,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-16 12:26:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:27,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1991166421, now seen corresponding path program 1 times [2022-11-16 12:26:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:27,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199210857] [2022-11-16 12:26:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:27,362 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 [2022-11-16 12:26:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:27,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:27,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 12:26:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:26:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:27,567 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:27,567 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:27,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:27,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199210857] [2022-11-16 12:26:27,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199210857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:27,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:27,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:27,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586775661] [2022-11-16 12:26:27,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:27,875 INFO L87 Difference]: Start difference. First operand 86 states and 234 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-16 12:26:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:28,061 INFO L93 Difference]: Finished difference Result 88 states and 243 transitions. [2022-11-16 12:26:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-16 12:26:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:28,062 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:26:28,063 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:26:28,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:28,063 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:28,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-16 12:26:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:26:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 12:26:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 2.927710843373494) internal successors, (243), 87 states have internal predecessors, (243), 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) [2022-11-16 12:26:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 243 transitions. [2022-11-16 12:26:28,067 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 243 transitions. Word has length 7 [2022-11-16 12:26:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:28,067 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 243 transitions. [2022-11-16 12:26:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-16 12:26:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 243 transitions. [2022-11-16 12:26:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:26:28,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:28,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:28,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:28,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:28,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1991657841, now seen corresponding path program 1 times [2022-11-16 12:26:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318236423] [2022-11-16 12:26:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:28,282 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 [2022-11-16 12:26:28,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:28,284 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:28,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 12:26:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:26:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:28,520 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:28,520 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:28,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:28,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:28,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318236423] [2022-11-16 12:26:28,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318236423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:28,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:28,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:28,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917844236] [2022-11-16 12:26:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:28,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:28,678 INFO L87 Difference]: Start difference. First operand 88 states and 243 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-16 12:26:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:28,884 INFO L93 Difference]: Finished difference Result 88 states and 242 transitions. [2022-11-16 12:26:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-16 12:26:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:28,886 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:26:28,886 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:26:28,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:28,887 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:28,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-16 12:26:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:26:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 12:26:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 2.9156626506024095) internal successors, (242), 87 states have internal predecessors, (242), 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) [2022-11-16 12:26:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 242 transitions. [2022-11-16 12:26:28,892 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 242 transitions. Word has length 7 [2022-11-16 12:26:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:28,892 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 242 transitions. [2022-11-16 12:26:28,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-16 12:26:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 242 transitions. [2022-11-16 12:26:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:26:28,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:28,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:28,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:29,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1991615712, now seen corresponding path program 1 times [2022-11-16 12:26:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:29,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357908200] [2022-11-16 12:26:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:29,106 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 [2022-11-16 12:26:29,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:29,107 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:29,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:26:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:29,288 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:29,289 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:29,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:29,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357908200] [2022-11-16 12:26:29,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357908200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:29,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:29,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:29,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272940702] [2022-11-16 12:26:29,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:29,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:29,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:29,445 INFO L87 Difference]: Start difference. First operand 88 states and 242 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-16 12:26:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:29,659 INFO L93 Difference]: Finished difference Result 88 states and 241 transitions. [2022-11-16 12:26:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-16 12:26:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:29,661 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:26:29,661 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:26:29,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:29,661 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:29,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-16 12:26:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:26:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 12:26:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 2.9036144578313254) internal successors, (241), 87 states have internal predecessors, (241), 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) [2022-11-16 12:26:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 241 transitions. [2022-11-16 12:26:29,666 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 241 transitions. Word has length 7 [2022-11-16 12:26:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:29,666 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 241 transitions. [2022-11-16 12:26:29,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-16 12:26:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 241 transitions. [2022-11-16 12:26:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:26:29,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:29,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:29,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:29,867 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1050241587, now seen corresponding path program 1 times [2022-11-16 12:26:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872355718] [2022-11-16 12:26:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:29,868 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 [2022-11-16 12:26:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:29,870 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:29,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 12:26:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:26:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:30,069 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:30,070 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:26:30,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:26:30,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872355718] [2022-11-16 12:26:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872355718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:30,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:26:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120510800] [2022-11-16 12:26:30,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:26:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:26:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:26:30,844 INFO L87 Difference]: Start difference. First operand 88 states and 241 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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) [2022-11-16 12:26:33,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:34,059 INFO L93 Difference]: Finished difference Result 246 states and 649 transitions. [2022-11-16 12:26:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:26:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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 7 [2022-11-16 12:26:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:34,062 INFO L225 Difference]: With dead ends: 246 [2022-11-16 12:26:34,062 INFO L226 Difference]: Without dead ends: 246 [2022-11-16 12:26:34,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:26:34,063 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 294 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:34,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 12:26:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-16 12:26:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 180. [2022-11-16 12:26:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 3.0628571428571427) internal successors, (536), 179 states have internal predecessors, (536), 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) [2022-11-16 12:26:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2022-11-16 12:26:34,071 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 7 [2022-11-16 12:26:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:34,072 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2022-11-16 12:26:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 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) [2022-11-16 12:26:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2022-11-16 12:26:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:26:34,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:34,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:34,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-16 12:26:34,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:34,287 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1596354662, now seen corresponding path program 1 times [2022-11-16 12:26:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:34,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478374656] [2022-11-16 12:26:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:34,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:34,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:34,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:34,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 12:26:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:26:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:34,500 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:34,501 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:34,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:34,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:34,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478374656] [2022-11-16 12:26:34,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478374656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:34,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:34,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125657620] [2022-11-16 12:26:34,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:34,776 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-16 12:26:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:35,008 INFO L93 Difference]: Finished difference Result 207 states and 621 transitions. [2022-11-16 12:26:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:35,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-11-16 12:26:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:35,010 INFO L225 Difference]: With dead ends: 207 [2022-11-16 12:26:35,011 INFO L226 Difference]: Without dead ends: 207 [2022-11-16 12:26:35,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:35,011 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:35,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-16 12:26:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-16 12:26:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-11-16 12:26:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 3.0742574257425743) internal successors, (621), 206 states have internal predecessors, (621), 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) [2022-11-16 12:26:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 621 transitions. [2022-11-16 12:26:35,022 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 621 transitions. Word has length 8 [2022-11-16 12:26:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:35,022 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 621 transitions. [2022-11-16 12:26:35,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-16 12:26:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 621 transitions. [2022-11-16 12:26:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:26:35,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:35,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:35,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:35,238 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:35,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1596610288, now seen corresponding path program 1 times [2022-11-16 12:26:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:35,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491511256] [2022-11-16 12:26:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:35,239 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 [2022-11-16 12:26:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:35,241 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:35,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:26:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:35,448 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:35,448 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:35,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:35,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:35,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491511256] [2022-11-16 12:26:35,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491511256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:35,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:35,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836634505] [2022-11-16 12:26:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:35,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:35,742 INFO L87 Difference]: Start difference. First operand 207 states and 621 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-16 12:26:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:35,986 INFO L93 Difference]: Finished difference Result 210 states and 625 transitions. [2022-11-16 12:26:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:26:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-11-16 12:26:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:35,988 INFO L225 Difference]: With dead ends: 210 [2022-11-16 12:26:35,988 INFO L226 Difference]: Without dead ends: 210 [2022-11-16 12:26:35,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:26:35,989 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:35,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-16 12:26:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-16 12:26:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-11-16 12:26:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 3.048780487804878) internal successors, (625), 209 states have internal predecessors, (625), 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) [2022-11-16 12:26:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 625 transitions. [2022-11-16 12:26:35,997 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 625 transitions. Word has length 8 [2022-11-16 12:26:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:35,997 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 625 transitions. [2022-11-16 12:26:35,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-16 12:26:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 625 transitions. [2022-11-16 12:26:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:26:35,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:35,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:36,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:36,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:36,211 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1797493042, now seen corresponding path program 1 times [2022-11-16 12:26:36,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:36,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461666256] [2022-11-16 12:26:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:36,211 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 [2022-11-16 12:26:36,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:36,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:36,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 12:26:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:26:36,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:36,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:36,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:26:36,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:26:36,961 INFO L350 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 366 treesize of output 362 [2022-11-16 12:26:36,971 INFO L350 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 362 treesize of output 358 [2022-11-16 12:26:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:38,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:38,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461666256] [2022-11-16 12:26:38,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461666256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:38,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:38,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:26:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669486138] [2022-11-16 12:26:38,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:38,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:26:38,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:26:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:26:38,198 INFO L87 Difference]: Start difference. First operand 210 states and 625 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-11-16 12:26:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:39,287 INFO L93 Difference]: Finished difference Result 377 states and 1035 transitions. [2022-11-16 12:26:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:26:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 [2022-11-16 12:26:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:39,290 INFO L225 Difference]: With dead ends: 377 [2022-11-16 12:26:39,291 INFO L226 Difference]: Without dead ends: 377 [2022-11-16 12:26:39,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:26:39,291 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:39,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:26:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-16 12:26:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 278. [2022-11-16 12:26:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 2.978021978021978) internal successors, (813), 277 states have internal predecessors, (813), 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) [2022-11-16 12:26:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 813 transitions. [2022-11-16 12:26:39,310 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 813 transitions. Word has length 8 [2022-11-16 12:26:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:39,310 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 813 transitions. [2022-11-16 12:26:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-11-16 12:26:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 813 transitions. [2022-11-16 12:26:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:26:39,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:39,311 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:39,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-16 12:26:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:39,523 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 88585589, now seen corresponding path program 2 times [2022-11-16 12:26:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944811215] [2022-11-16 12:26:39,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:26:39,525 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 [2022-11-16 12:26:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:39,526 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:39,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 12:26:39,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:26:39,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:26:39,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:39,796 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:39,797 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:40,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:26:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:26:40,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 57 [2022-11-16 12:26:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:40,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:26:40,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:26:40,629 INFO L350 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 366 treesize of output 362 [2022-11-16 12:26:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:42,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:42,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944811215] [2022-11-16 12:26:42,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944811215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:42,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:42,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:26:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169194356] [2022-11-16 12:26:42,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:42,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:26:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:26:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:26:42,838 INFO L87 Difference]: Start difference. First operand 278 states and 813 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2022-11-16 12:26:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:45,883 INFO L93 Difference]: Finished difference Result 417 states and 1133 transitions. [2022-11-16 12:26:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:26:45,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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 [2022-11-16 12:26:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:45,887 INFO L225 Difference]: With dead ends: 417 [2022-11-16 12:26:45,887 INFO L226 Difference]: Without dead ends: 417 [2022-11-16 12:26:45,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:26:45,888 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:45,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 267 Invalid, 0 Unknown, 16 Unchecked, 1.7s Time] [2022-11-16 12:26:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-16 12:26:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 283. [2022-11-16 12:26:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 2.9964028776978417) internal successors, (833), 282 states have internal predecessors, (833), 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) [2022-11-16 12:26:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 833 transitions. [2022-11-16 12:26:45,899 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 833 transitions. Word has length 9 [2022-11-16 12:26:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:45,900 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 833 transitions. [2022-11-16 12:26:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2022-11-16 12:26:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 833 transitions. [2022-11-16 12:26:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:26:45,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:45,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:26:45,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:46,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:46,122 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:26:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1548799514, now seen corresponding path program 3 times [2022-11-16 12:26:46,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:46,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154341955] [2022-11-16 12:26:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:26:46,124 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 [2022-11-16 12:26:46,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:46,125 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:26:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:26:46,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:26:46,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:26:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:46,390 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:26:46,390 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:26:47,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-11-16 12:26:47,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:26:47,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 340 [2022-11-16 12:26:47,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:26:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:26:47,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:49,473 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:26:49,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1160 treesize of output 565 [2022-11-16 12:26:49,486 INFO L350 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 565 treesize of output 557 [2022-11-16 12:28:03,148 WARN L233 SmtUtils]: Spent 42.90s on a formula simplification. DAG size of input: 201 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:28:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:04,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154341955] [2022-11-16 12:28:04,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154341955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:04,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:04,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:28:04,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500985135] [2022-11-16 12:28:04,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:04,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:28:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:28:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:28:04,378 INFO L87 Difference]: Start difference. First operand 283 states and 833 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2022-11-16 12:28:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:06,193 INFO L93 Difference]: Finished difference Result 290 states and 863 transitions. [2022-11-16 12:28:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:28:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 10 [2022-11-16 12:28:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:06,196 INFO L225 Difference]: With dead ends: 290 [2022-11-16 12:28:06,196 INFO L226 Difference]: Without dead ends: 290 [2022-11-16 12:28:06,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:28:06,197 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:06,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-16 12:28:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-16 12:28:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2022-11-16 12:28:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 3.0141342756183747) internal successors, (853), 287 states have internal predecessors, (853), 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) [2022-11-16 12:28:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 853 transitions. [2022-11-16 12:28:06,207 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 853 transitions. Word has length 10 [2022-11-16 12:28:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:06,207 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 853 transitions. [2022-11-16 12:28:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2022-11-16 12:28:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 853 transitions. [2022-11-16 12:28:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:28:06,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:06,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:06,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:06,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:28:06,422 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:28:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1548808442, now seen corresponding path program 1 times [2022-11-16 12:28:06,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:06,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203454643] [2022-11-16 12:28:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:06,422 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 [2022-11-16 12:28:06,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:06,423 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:28:06,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 12:28:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:28:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:06,731 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:28:06,731 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:28:07,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:28:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:07,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 57 [2022-11-16 12:28:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:07,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:07,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:07,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:28:07,951 INFO L350 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 366 treesize of output 362 [2022-11-16 12:28:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:11,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203454643] [2022-11-16 12:28:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203454643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:11,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:11,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:28:11,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67695904] [2022-11-16 12:28:11,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:11,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:28:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:28:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:11,342 INFO L87 Difference]: Start difference. First operand 288 states and 853 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:16,782 INFO L93 Difference]: Finished difference Result 513 states and 1469 transitions. [2022-11-16 12:28:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:28:16,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 10 [2022-11-16 12:28:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:16,788 INFO L225 Difference]: With dead ends: 513 [2022-11-16 12:28:16,789 INFO L226 Difference]: Without dead ends: 513 [2022-11-16 12:28:16,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:28:16,789 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 211 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:16,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 22 Unchecked, 3.1s Time] [2022-11-16 12:28:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-16 12:28:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 373. [2022-11-16 12:28:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 3.1440217391304346) internal successors, (1157), 372 states have internal predecessors, (1157), 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) [2022-11-16 12:28:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1157 transitions. [2022-11-16 12:28:16,803 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1157 transitions. Word has length 10 [2022-11-16 12:28:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:16,804 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 1157 transitions. [2022-11-16 12:28:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1157 transitions. [2022-11-16 12:28:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:28:16,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:16,805 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:16,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:28:17,017 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:28:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1548799700, now seen corresponding path program 1 times [2022-11-16 12:28:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:17,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663489146] [2022-11-16 12:28:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:17,018 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 [2022-11-16 12:28:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:17,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:28:17,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 12:28:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:28:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:17,343 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:28:17,344 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:28:18,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:28:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:18,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 57 [2022-11-16 12:28:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:18,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:18,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:18,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:28:18,513 INFO L350 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 366 treesize of output 362 [2022-11-16 12:28:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:21,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663489146] [2022-11-16 12:28:21,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663489146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:21,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:21,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:28:21,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022160991] [2022-11-16 12:28:21,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:21,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:28:21,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:28:21,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:21,687 INFO L87 Difference]: Start difference. First operand 373 states and 1157 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:26,989 INFO L93 Difference]: Finished difference Result 606 states and 1809 transitions. [2022-11-16 12:28:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:28:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 10 [2022-11-16 12:28:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:26,996 INFO L225 Difference]: With dead ends: 606 [2022-11-16 12:28:26,997 INFO L226 Difference]: Without dead ends: 606 [2022-11-16 12:28:26,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:28:26,998 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 245 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:26,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 0 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 246 Invalid, 0 Unknown, 82 Unchecked, 2.8s Time] [2022-11-16 12:28:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-16 12:28:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 392. [2022-11-16 12:28:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 3.2170542635658914) internal successors, (1245), 391 states have internal predecessors, (1245), 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) [2022-11-16 12:28:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1245 transitions. [2022-11-16 12:28:27,013 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1245 transitions. Word has length 10 [2022-11-16 12:28:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:27,013 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 1245 transitions. [2022-11-16 12:28:27,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1245 transitions. [2022-11-16 12:28:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:28:27,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:27,015 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:27,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:27,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:28:27,227 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:28:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1548801126, now seen corresponding path program 1 times [2022-11-16 12:28:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371530883] [2022-11-16 12:28:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:27,229 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 [2022-11-16 12:28:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:27,230 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:28:27,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 12:28:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:28:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:27,591 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:28:27,591 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:28:28,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:28:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:28,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:28,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 57 [2022-11-16 12:28:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:28,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:28,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:28,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:28:28,783 INFO L350 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 366 treesize of output 362 [2022-11-16 12:28:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:31,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371530883] [2022-11-16 12:28:31,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371530883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:31,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:31,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:28:31,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579011449] [2022-11-16 12:28:31,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:31,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:28:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:31,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:28:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:31,963 INFO L87 Difference]: Start difference. First operand 392 states and 1245 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:37,771 INFO L93 Difference]: Finished difference Result 596 states and 1812 transitions. [2022-11-16 12:28:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:28:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 10 [2022-11-16 12:28:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:37,777 INFO L225 Difference]: With dead ends: 596 [2022-11-16 12:28:37,777 INFO L226 Difference]: Without dead ends: 596 [2022-11-16 12:28:37,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:28:37,778 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:37,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 324 Invalid, 0 Unknown, 73 Unchecked, 3.0s Time] [2022-11-16 12:28:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-16 12:28:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 413. [2022-11-16 12:28:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 3.269607843137255) internal successors, (1334), 412 states have internal predecessors, (1334), 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) [2022-11-16 12:28:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1334 transitions. [2022-11-16 12:28:37,792 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1334 transitions. Word has length 10 [2022-11-16 12:28:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:37,793 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 1334 transitions. [2022-11-16 12:28:37,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1334 transitions. [2022-11-16 12:28:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:28:37,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:37,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:37,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:38,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:28:38,006 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:28:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1549076282, now seen corresponding path program 2 times [2022-11-16 12:28:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668714758] [2022-11-16 12:28:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:28:38,007 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 [2022-11-16 12:28:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:38,008 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:28:38,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 12:28:38,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:28:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:38,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:28:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:38,369 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:28:38,370 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:28:39,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:28:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:39,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:39,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 57 [2022-11-16 12:28:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:39,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:39,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:39,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:28:39,627 INFO L350 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 366 treesize of output 362 [2022-11-16 12:28:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:42,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668714758] [2022-11-16 12:28:42,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668714758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:42,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:42,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:28:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296412190] [2022-11-16 12:28:42,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:42,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:28:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:28:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:42,898 INFO L87 Difference]: Start difference. First operand 413 states and 1334 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:48,841 INFO L93 Difference]: Finished difference Result 751 states and 2264 transitions. [2022-11-16 12:28:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:28:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 10 [2022-11-16 12:28:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:48,847 INFO L225 Difference]: With dead ends: 751 [2022-11-16 12:28:48,848 INFO L226 Difference]: Without dead ends: 751 [2022-11-16 12:28:48,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:28:48,848 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 252 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:48,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 0 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 358 Invalid, 0 Unknown, 179 Unchecked, 3.3s Time] [2022-11-16 12:28:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-16 12:28:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 365. [2022-11-16 12:28:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 3.1305555555555555) internal successors, (1127), 364 states have internal predecessors, (1127), 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) [2022-11-16 12:28:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2022-11-16 12:28:48,873 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 10 [2022-11-16 12:28:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:48,874 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2022-11-16 12:28:48,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2022-11-16 12:28:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:28:48,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:48,875 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:48,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:49,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:28:49,087 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:28:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1548805280, now seen corresponding path program 2 times [2022-11-16 12:28:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:49,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665644443] [2022-11-16 12:28:49,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:28:49,088 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 [2022-11-16 12:28:49,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:49,089 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:28:49,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 12:28:49,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:28:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:28:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:49,381 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:28:49,382 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-16 12:28:49,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:28:49,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:49,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 57 [2022-11-16 12:28:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:49,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:50,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:50,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 716 treesize of output 366 [2022-11-16 12:28:50,283 INFO L350 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 366 treesize of output 362 [2022-11-16 12:28:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:53,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665644443] [2022-11-16 12:28:53,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665644443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:53,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:53,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:28:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980404642] [2022-11-16 12:28:53,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:28:53,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:28:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:28:53,487 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:56,221 INFO L93 Difference]: Finished difference Result 591 states and 1717 transitions. [2022-11-16 12:28:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:28:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 10 [2022-11-16 12:28:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:56,224 INFO L225 Difference]: With dead ends: 591 [2022-11-16 12:28:56,224 INFO L226 Difference]: Without dead ends: 591 [2022-11-16 12:28:56,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:28:56,225 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 164 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:56,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 0 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 12:28:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-16 12:28:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 316. [2022-11-16 12:28:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 3.102893890675241) internal successors, (965), 315 states have internal predecessors, (965), 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) [2022-11-16 12:28:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 965 transitions. [2022-11-16 12:28:56,238 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 965 transitions. Word has length 10 [2022-11-16 12:28:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:56,238 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 965 transitions. [2022-11-16 12:28:56,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 12:28:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 965 transitions. [2022-11-16 12:28:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:28:56,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:56,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:56,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-16 12:28:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:28:56,452 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:28:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash -768139083, now seen corresponding path program 3 times [2022-11-16 12:28:56,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:56,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813454427] [2022-11-16 12:28:56,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:28:56,453 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 [2022-11-16 12:28:56,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:56,454 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:28:56,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 12:28:56,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:28:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:28:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:56,785 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:28:56,786 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:28:57,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-11-16 12:28:57,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:57,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 340 [2022-11-16 12:28:57,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:28:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:58,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:00,997 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:29:00,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1160 treesize of output 565 [2022-11-16 12:29:01,007 INFO L350 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 565 treesize of output 557 [2022-11-16 12:29:58,751 WARN L233 SmtUtils]: Spent 24.51s on a formula simplification. DAG size of input: 242 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:30:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:00,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813454427] [2022-11-16 12:30:00,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813454427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:00,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:30:00,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:30:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675776699] [2022-11-16 12:30:00,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:00,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:30:00,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:30:00,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:30:00,049 INFO L87 Difference]: Start difference. First operand 316 states and 965 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:06,201 INFO L93 Difference]: Finished difference Result 415 states and 1167 transitions. [2022-11-16 12:30:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:30:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:30:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:06,207 INFO L225 Difference]: With dead ends: 415 [2022-11-16 12:30:06,207 INFO L226 Difference]: Without dead ends: 415 [2022-11-16 12:30:06,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:30:06,208 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:06,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 230 Unchecked, 0.9s Time] [2022-11-16 12:30:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-16 12:30:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 330. [2022-11-16 12:30:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 3.0923076923076924) internal successors, (1005), 329 states have internal predecessors, (1005), 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) [2022-11-16 12:30:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1005 transitions. [2022-11-16 12:30:06,219 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1005 transitions. Word has length 11 [2022-11-16 12:30:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:06,219 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 1005 transitions. [2022-11-16 12:30:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1005 transitions. [2022-11-16 12:30:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:30:06,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:06,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:06,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:06,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:30:06,434 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:30:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -768130341, now seen corresponding path program 3 times [2022-11-16 12:30:06,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:06,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328698572] [2022-11-16 12:30:06,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:30:06,435 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 [2022-11-16 12:30:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:06,436 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:30:06,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 12:30:06,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:30:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:30:06,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:30:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:06,840 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:30:06,840 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:30:07,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-11-16 12:30:08,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:30:08,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 340 [2022-11-16 12:30:08,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:30:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:10,886 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:30:10,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1160 treesize of output 565 [2022-11-16 12:30:10,899 INFO L350 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 565 treesize of output 557 [2022-11-16 12:31:54,344 WARN L233 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 209 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:31:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:55,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328698572] [2022-11-16 12:31:55,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328698572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:55,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:31:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:31:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245787029] [2022-11-16 12:31:55,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:55,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:31:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:31:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:31:55,692 INFO L87 Difference]: Start difference. First operand 330 states and 1005 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:05,646 INFO L93 Difference]: Finished difference Result 523 states and 1514 transitions. [2022-11-16 12:32:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:32:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:32:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:05,652 INFO L225 Difference]: With dead ends: 523 [2022-11-16 12:32:05,652 INFO L226 Difference]: Without dead ends: 523 [2022-11-16 12:32:05,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=80, Invalid=225, Unknown=1, NotChecked=0, Total=306 [2022-11-16 12:32:05,652 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:05,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 381 Unchecked, 1.2s Time] [2022-11-16 12:32:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-16 12:32:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 343. [2022-11-16 12:32:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 3.165680473372781) internal successors, (1070), 342 states have internal predecessors, (1070), 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) [2022-11-16 12:32:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1070 transitions. [2022-11-16 12:32:05,664 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1070 transitions. Word has length 11 [2022-11-16 12:32:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:05,665 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 1070 transitions. [2022-11-16 12:32:05,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1070 transitions. [2022-11-16 12:32:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:32:05,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:05,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:05,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:05,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:05,880 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:32:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -768131767, now seen corresponding path program 2 times [2022-11-16 12:32:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:05,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761899174] [2022-11-16 12:32:05,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:05,880 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 [2022-11-16 12:32:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:05,881 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:32:05,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 12:32:06,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:32:06,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:32:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:06,227 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:32:06,227 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:32:07,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-11-16 12:32:07,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:32:07,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 340 [2022-11-16 12:32:07,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:32:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:07,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:10,619 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:32:10,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1160 treesize of output 565 [2022-11-16 12:32:10,631 INFO L350 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 565 treesize of output 557 [2022-11-16 12:33:59,847 WARN L233 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 213 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:34:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:01,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:01,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761899174] [2022-11-16 12:34:01,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761899174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:01,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:01,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:34:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858802683] [2022-11-16 12:34:01,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:34:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:34:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:34:01,206 INFO L87 Difference]: Start difference. First operand 343 states and 1070 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:09,388 INFO L93 Difference]: Finished difference Result 534 states and 1572 transitions. [2022-11-16 12:34:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:34:09,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:34:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:09,395 INFO L225 Difference]: With dead ends: 534 [2022-11-16 12:34:09,395 INFO L226 Difference]: Without dead ends: 534 [2022-11-16 12:34:09,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 89.0s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:34:09,396 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:09,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 320 Unchecked, 1.4s Time] [2022-11-16 12:34:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-16 12:34:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 359. [2022-11-16 12:34:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 3.231638418079096) internal successors, (1144), 358 states have internal predecessors, (1144), 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) [2022-11-16 12:34:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1144 transitions. [2022-11-16 12:34:09,408 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1144 transitions. Word has length 11 [2022-11-16 12:34:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:09,408 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 1144 transitions. [2022-11-16 12:34:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1144 transitions. [2022-11-16 12:34:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:34:09,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:09,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:09,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:09,623 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:34:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -768135921, now seen corresponding path program 4 times [2022-11-16 12:34:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:09,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022295300] [2022-11-16 12:34:09,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:34:09,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:09,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:09,624 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:34:09,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 12:34:09,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:34:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:34:09,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:09,988 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:34:09,988 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:34:11,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-11-16 12:34:11,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:11,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 340 [2022-11-16 12:34:11,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:34:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:11,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:15,407 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:34:15,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1160 treesize of output 565 [2022-11-16 12:34:15,419 INFO L350 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 565 treesize of output 557 [2022-11-16 12:35:05,901 WARN L233 SmtUtils]: Spent 16.03s on a formula simplification. DAG size of input: 238 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:35:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:07,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022295300] [2022-11-16 12:35:07,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022295300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:07,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:07,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:35:07,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75097170] [2022-11-16 12:35:07,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:07,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:35:07,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:35:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:35:07,620 INFO L87 Difference]: Start difference. First operand 359 states and 1144 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:17,615 INFO L93 Difference]: Finished difference Result 669 states and 2054 transitions. [2022-11-16 12:35:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:35:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:35:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:17,620 INFO L225 Difference]: With dead ends: 669 [2022-11-16 12:35:17,620 INFO L226 Difference]: Without dead ends: 669 [2022-11-16 12:35:17,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:35:17,621 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 131 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:17,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 0 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 348 Unchecked, 1.6s Time] [2022-11-16 12:35:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-16 12:35:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 409. [2022-11-16 12:35:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 404 states have (on average 3.4207920792079207) internal successors, (1382), 408 states have internal predecessors, (1382), 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) [2022-11-16 12:35:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1382 transitions. [2022-11-16 12:35:17,634 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1382 transitions. Word has length 11 [2022-11-16 12:35:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:17,635 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 1382 transitions. [2022-11-16 12:35:17,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1382 transitions. [2022-11-16 12:35:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:35:17,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:17,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:17,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:17,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:17,849 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:35:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -768180127, now seen corresponding path program 3 times [2022-11-16 12:35:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:17,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547354470] [2022-11-16 12:35:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:17,850 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 [2022-11-16 12:35:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:17,851 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:35:17,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-16 12:35:18,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:35:18,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:35:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:18,278 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:35:18,278 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:35:19,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 322 [2022-11-16 12:35:19,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:35:19,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 340 [2022-11-16 12:35:20,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:35:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:20,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:23,956 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:35:23,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1160 treesize of output 565 [2022-11-16 12:35:23,970 INFO L350 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 565 treesize of output 557 [2022-11-16 12:36:46,711 WARN L233 SmtUtils]: Spent 38.88s on a formula simplification. DAG size of input: 242 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:36:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:48,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:48,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547354470] [2022-11-16 12:36:48,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547354470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:48,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:48,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:36:48,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062791492] [2022-11-16 12:36:48,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:48,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:36:48,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:36:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:36:48,661 INFO L87 Difference]: Start difference. First operand 409 states and 1382 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:56,308 INFO L93 Difference]: Finished difference Result 675 states and 2177 transitions. [2022-11-16 12:36:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:36:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:36:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:56,312 INFO L225 Difference]: With dead ends: 675 [2022-11-16 12:36:56,312 INFO L226 Difference]: Without dead ends: 675 [2022-11-16 12:36:56,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:36:56,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:56,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 381 Unchecked, 1.6s Time] [2022-11-16 12:36:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-11-16 12:36:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 453. [2022-11-16 12:36:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 448 states have (on average 3.5669642857142856) internal successors, (1598), 452 states have internal predecessors, (1598), 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) [2022-11-16 12:36:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1598 transitions. [2022-11-16 12:36:56,325 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1598 transitions. Word has length 11 [2022-11-16 12:36:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:56,326 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 1598 transitions. [2022-11-16 12:36:56,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1598 transitions. [2022-11-16 12:36:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:36:56,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:56,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:56,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-16 12:36:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:56,540 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:36:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash -768308901, now seen corresponding path program 5 times [2022-11-16 12:36:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:56,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803034593] [2022-11-16 12:36:56,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:36:56,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:56,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:56,542 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:36:56,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 12:36:56,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:36:56,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:36:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:56,980 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:36:56,980 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:36:58,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:36:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:36:58,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 105 [2022-11-16 12:36:58,512 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:36:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:58,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:03,338 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-16 12:37:03,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1208 treesize of output 613 [2022-11-16 12:37:03,354 INFO L350 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 613 treesize of output 605 [2022-11-16 12:37:54,099 WARN L233 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 194 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:37:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:56,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:56,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803034593] [2022-11-16 12:37:56,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803034593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:56,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:56,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:37:56,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373979514] [2022-11-16 12:37:56,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:56,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:37:56,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:37:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:37:56,965 INFO L87 Difference]: Start difference. First operand 453 states and 1598 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:38:44,621 INFO L93 Difference]: Finished difference Result 974 states and 2957 transitions. [2022-11-16 12:38:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:38:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:38:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:38:44,631 INFO L225 Difference]: With dead ends: 974 [2022-11-16 12:38:44,631 INFO L226 Difference]: Without dead ends: 974 [2022-11-16 12:38:44,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:38:44,632 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 661 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:38:44,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 0 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-16 12:38:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-11-16 12:38:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 470. [2022-11-16 12:38:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 3.139784946236559) internal successors, (1460), 469 states have internal predecessors, (1460), 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) [2022-11-16 12:38:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1460 transitions. [2022-11-16 12:38:44,649 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1460 transitions. Word has length 11 [2022-11-16 12:38:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:38:44,649 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1460 transitions. [2022-11-16 12:38:44,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1460 transitions. [2022-11-16 12:38:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:38:44,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:38:44,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:44,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 12:38:44,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:38:44,863 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:38:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1877988312, now seen corresponding path program 1 times [2022-11-16 12:38:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:38:44,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541487059] [2022-11-16 12:38:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:38:44,864 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 [2022-11-16 12:38:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:38:44,865 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:38:44,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 12:38:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:38:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:38:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:45,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:38:45,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:38:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541487059] [2022-11-16 12:38:45,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541487059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:38:45,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:38:45,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:38:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585794331] [2022-11-16 12:38:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:38:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:38:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:38:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:38:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:38:45,490 INFO L87 Difference]: Start difference. First operand 470 states and 1460 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-16 12:38:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:38:46,205 INFO L93 Difference]: Finished difference Result 807 states and 2499 transitions. [2022-11-16 12:38:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:38:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 [2022-11-16 12:38:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:38:46,209 INFO L225 Difference]: With dead ends: 807 [2022-11-16 12:38:46,209 INFO L226 Difference]: Without dead ends: 796 [2022-11-16 12:38:46,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:38:46,210 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:38:46,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:38:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-16 12:38:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 476. [2022-11-16 12:38:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 3.0955414012738856) internal successors, (1458), 475 states have internal predecessors, (1458), 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) [2022-11-16 12:38:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1458 transitions. [2022-11-16 12:38:46,226 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1458 transitions. Word has length 12 [2022-11-16 12:38:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:38:46,226 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 1458 transitions. [2022-11-16 12:38:46,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-16 12:38:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1458 transitions. [2022-11-16 12:38:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:38:46,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:38:46,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:46,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-16 12:38:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:38:46,440 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-16 12:38:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1712264306, now seen corresponding path program 4 times [2022-11-16 12:38:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:38:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129929359] [2022-11-16 12:38:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:38:46,441 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 [2022-11-16 12:38:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:38:46,442 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:38:46,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ecea7a2-a80f-43a1-9d77-ce2674eaf6c4/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 12:38:46,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:38:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:38:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:46,934 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 12:38:46,934 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 12:38:50,758 INFO L321 Elim1Store]: treesize reduction 332, result has 0.3 percent of original size [2022-11-16 12:38:50,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 1291 treesize of output 525 [2022-11-16 12:38:50,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:50,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 537 treesize of output 533 [2022-11-16 12:38:51,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 12:38:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:53,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:09,893 INFO L321 Elim1Store]: treesize reduction 440, result has 0.2 percent of original size [2022-11-16 12:39:09,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 2651 treesize of output 1028 [2022-11-16 12:39:09,913 INFO L350 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 1028 treesize of output 1016