./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- 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 12:24:03,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:24:03,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:24:03,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:24:03,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:24:03,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:24:03,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:24:03,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:24:03,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:24:03,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:24:03,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:24:03,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:24:03,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:24:03,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:24:03,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:24:03,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:24:03,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:24:03,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:24:03,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:24:03,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:24:03,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:24:03,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:24:03,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:24:03,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:24:03,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:24:03,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:24:03,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:24:03,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:24:03,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:24:03,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:24:03,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:24:03,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:24:03,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:24:03,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:24:03,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:24:03,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:24:03,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:24:03,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:24:03,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:24:03,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:24:03,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:24:03,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:24:03,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:24:03,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:24:03,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:24:03,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:24:03,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:24:03,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:24:03,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:24:03,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:24:03,988 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:24:03,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:24:03,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:24:03,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:24:03,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:24:03,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:24:03,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:24:03,991 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:24:03,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:24:03,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:24:03,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:24:03,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:24:03,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:24:03,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:24:03,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:24:03,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:24:03,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:24:03,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:24:03,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:24:03,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:24:03,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:24:03,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:24:03,997 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_ea11b118-d82c-4c68-8717-fe4afac12e4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-16 12:24:04,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:24:04,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:24:04,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:24:04,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:24:04,330 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:24:04,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-16 12:24:04,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/1ff5779fc/42be163170c74aefa7eea88ff197bee9/FLAGb3d868897 [2022-11-16 12:24:04,943 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:24:04,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-16 12:24:04,956 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/1ff5779fc/42be163170c74aefa7eea88ff197bee9/FLAGb3d868897 [2022-11-16 12:24:05,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/1ff5779fc/42be163170c74aefa7eea88ff197bee9 [2022-11-16 12:24:05,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:24:05,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:24:05,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:24:05,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:24:05,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:24:05,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:24:05" (1/1) ... [2022-11-16 12:24:05,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1edbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:05, skipping insertion in model container [2022-11-16 12:24:05,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:24:05" (1/1) ... [2022-11-16 12:24:05,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:24:05,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:24:05,541 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_ea11b118-d82c-4c68-8717-fe4afac12e4b/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-16 12:24:05,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:24:05,577 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 12:24:05,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d9d1333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:05, skipping insertion in model container [2022-11-16 12:24:05,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:24:05,578 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 12:24:05,580 INFO L158 Benchmark]: Toolchain (without parser) took 325.43ms. Allocated memory is still 146.8MB. Free memory was 107.7MB in the beginning and 121.4MB in the end (delta: -13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:24:05,583 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 146.8MB. Free memory was 125.0MB in the beginning and 124.9MB in the end (delta: 70.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:24:05,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.53ms. Allocated memory is still 146.8MB. Free memory was 107.5MB in the beginning and 121.4MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:24:05,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 146.8MB. Free memory was 125.0MB in the beginning and 124.9MB in the end (delta: 70.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.53ms. Allocated memory is still 146.8MB. Free memory was 107.5MB in the beginning and 121.4MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- 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 12:24:07,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:24:07,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:24:07,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:24:07,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:24:07,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:24:07,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:24:07,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:24:07,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:24:07,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:24:07,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:24:07,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:24:07,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:24:07,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:24:07,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:24:07,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:24:07,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:24:07,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:24:07,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:24:07,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:24:07,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:24:07,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:24:07,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:24:07,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:24:07,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:24:07,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:24:07,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:24:07,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:24:07,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:24:07,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:24:07,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:24:07,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:24:07,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:24:07,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:24:07,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:24:07,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:24:07,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:24:07,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:24:07,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:24:07,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:24:07,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:24:07,877 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 12:24:07,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:24:07,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:24:07,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:24:07,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:24:07,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:24:07,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:24:07,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:24:07,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:24:07,929 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:24:07,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:24:07,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:24:07,930 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:24:07,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:24:07,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:24:07,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:24:07,930 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:24:07,930 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:24:07,931 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:24:07,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:24:07,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:24:07,931 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:24:07,931 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:24:07,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:24:07,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:24:07,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:24:07,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:24:07,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:24:07,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:24:07,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:24:07,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:24:07,933 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:24:07,933 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:24:07,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:24:07,934 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_ea11b118-d82c-4c68-8717-fe4afac12e4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-16 12:24:08,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:24:08,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:24:08,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:24:08,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:24:08,429 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:24:08,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-16 12:24:08,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/3de07d158/64efaeaafc934d0688362a02dd24b253/FLAG1ab79532d [2022-11-16 12:24:09,094 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:24:09,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-16 12:24:09,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/3de07d158/64efaeaafc934d0688362a02dd24b253/FLAG1ab79532d [2022-11-16 12:24:09,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/data/3de07d158/64efaeaafc934d0688362a02dd24b253 [2022-11-16 12:24:09,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:24:09,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:24:09,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:24:09,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:24:09,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:24:09,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211dd2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09, skipping insertion in model container [2022-11-16 12:24:09,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:24:09,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:24:09,706 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_ea11b118-d82c-4c68-8717-fe4afac12e4b/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-16 12:24:09,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:24:09,760 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 12:24:09,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:24:09,799 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_ea11b118-d82c-4c68-8717-fe4afac12e4b/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-16 12:24:09,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:24:09,820 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:24:09,849 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_ea11b118-d82c-4c68-8717-fe4afac12e4b/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-16 12:24:09,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:24:09,876 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:24:09,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09 WrapperNode [2022-11-16 12:24:09,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:24:09,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:24:09,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:24:09,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:24:09,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,941 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 395 [2022-11-16 12:24:09,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:24:09,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:24:09,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:24:09,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:24:09,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,983 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:09,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:24:09,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:24:09,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:24:09,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:24:09,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (1/1) ... [2022-11-16 12:24:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:24:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:10,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:24:10,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:24:10,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:24:10,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-16 12:24:10,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:24:10,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:24:10,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:24:10,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:24:10,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:24:10,087 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:24:10,087 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:24:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:24:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:24:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:24:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:24:10,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:24:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-16 12:24:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:24:10,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:24:10,091 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 12:24:10,348 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:24:10,354 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:24:11,753 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:24:11,769 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:24:11,769 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:24:11,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:24:11 BoogieIcfgContainer [2022-11-16 12:24:11,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:24:11,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:24:11,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:24:11,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:24:11,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:24:09" (1/3) ... [2022-11-16 12:24:11,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14937c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:24:11, skipping insertion in model container [2022-11-16 12:24:11,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:24:09" (2/3) ... [2022-11-16 12:24:11,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14937c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:24:11, skipping insertion in model container [2022-11-16 12:24:11,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:24:11" (3/3) ... [2022-11-16 12:24:11,795 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2022-11-16 12:24:11,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:24:11,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2022-11-16 12:24:11,827 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:24:12,038 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:24:12,104 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:24:12,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-16 12:24:12,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-16 12:24:12,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 559 places, 590 transitions, 1204 flow [2022-11-16 12:24:12,400 INFO L130 PetriNetUnfolder]: 41/587 cut-off events. [2022-11-16 12:24:12,400 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:24:12,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 587 events. 41/587 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1032 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 485. Up to 2 conditions per place. [2022-11-16 12:24:12,427 INFO L119 LiptonReduction]: Number of co-enabled transitions 32370 [2022-11-16 12:25:48,506 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 171 DAG size of output: 169 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 12:26:03,224 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 174 DAG size of output: 173 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 12:26:05,547 INFO L134 LiptonReduction]: Checked pairs total: 53240 [2022-11-16 12:26:05,547 INFO L136 LiptonReduction]: Total number of compositions: 713 [2022-11-16 12:26:05,557 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 107 transitions, 238 flow [2022-11-16 12:26:06,996 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 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 12:26:07,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:26:07,070 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;@12dd9e91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:26:07,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2022-11-16 12:26:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 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 12:26:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:26:07,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:07,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:26:07,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash 72928, now seen corresponding path program 1 times [2022-11-16 12:26:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:07,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874211303] [2022-11-16 12:26:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:07,198 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 12:26:07,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:07,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:26:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:07,617 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:26:07,618 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:26:07,655 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 12:26:07,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:07,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:07,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874211303] [2022-11-16 12:26:07,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874211303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:07,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:07,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732357235] [2022-11-16 12:26:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:07,730 INFO L87 Difference]: Start difference. First operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 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 12:26:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:09,110 INFO L93 Difference]: Finished difference Result 16781 states and 61213 transitions. [2022-11-16 12:26:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:09,113 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 12:26:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:09,339 INFO L225 Difference]: With dead ends: 16781 [2022-11-16 12:26:09,340 INFO L226 Difference]: Without dead ends: 16781 [2022-11-16 12:26:09,341 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 12:26:09,348 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:09,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:26:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16781 states. [2022-11-16 12:26:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16781 to 16781. [2022-11-16 12:26:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16781 states, 11591 states have (on average 5.281080148390993) internal successors, (61213), 16780 states have internal predecessors, (61213), 0 states have call successors, (0), 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 12:26:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16781 states to 16781 states and 61213 transitions. [2022-11-16 12:26:10,388 INFO L78 Accepts]: Start accepts. Automaton has 16781 states and 61213 transitions. Word has length 2 [2022-11-16 12:26:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:10,389 INFO L495 AbstractCegarLoop]: Abstraction has 16781 states and 61213 transitions. [2022-11-16 12:26:10,389 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 12:26:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 16781 states and 61213 transitions. [2022-11-16 12:26:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:26:10,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:10,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:26:10,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:10,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:10,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 72929, now seen corresponding path program 1 times [2022-11-16 12:26:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291832930] [2022-11-16 12:26:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:10,605 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 12:26:10,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:10,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:10,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:10,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:26:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:11,075 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:26:11,076 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:26:11,116 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 12:26:11,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:11,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:11,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291832930] [2022-11-16 12:26:11,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291832930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:11,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:11,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:26:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925722776] [2022-11-16 12:26:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:11,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:11,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:11,121 INFO L87 Difference]: Start difference. First operand 16781 states and 61213 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 12:26:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:12,522 INFO L93 Difference]: Finished difference Result 16784 states and 61219 transitions. [2022-11-16 12:26:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:12,523 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 12:26:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:12,679 INFO L225 Difference]: With dead ends: 16784 [2022-11-16 12:26:12,679 INFO L226 Difference]: Without dead ends: 16784 [2022-11-16 12:26:12,680 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 12:26:12,684 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:12,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:26:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16784 states. [2022-11-16 12:26:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16784 to 16784. [2022-11-16 12:26:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 11594 states have (on average 5.280231154045196) internal successors, (61219), 16783 states have internal predecessors, (61219), 0 states have call successors, (0), 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 12:26:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 61219 transitions. [2022-11-16 12:26:13,651 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 61219 transitions. Word has length 2 [2022-11-16 12:26:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:13,652 INFO L495 AbstractCegarLoop]: Abstraction has 16784 states and 61219 transitions. [2022-11-16 12:26:13,652 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 12:26:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 61219 transitions. [2022-11-16 12:26:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:26:13,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:13,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:26:13,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:13,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2275541, now seen corresponding path program 1 times [2022-11-16 12:26:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:13,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286695983] [2022-11-16 12:26:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:13,867 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 12:26:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:13,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:13,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:26:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:14,154 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:26:14,154 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:26:14,247 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 12:26:14,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:14,537 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 12:26:14,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286695983] [2022-11-16 12:26:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286695983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:14,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:14,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:26:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062227639] [2022-11-16 12:26:14,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:26:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:26:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:26:14,540 INFO L87 Difference]: Start difference. First operand 16784 states and 61219 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 12:26:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:18,886 INFO L93 Difference]: Finished difference Result 16793 states and 61237 transitions. [2022-11-16 12:26:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:26:18,887 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 12:26:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:19,045 INFO L225 Difference]: With dead ends: 16793 [2022-11-16 12:26:19,045 INFO L226 Difference]: Without dead ends: 16793 [2022-11-16 12:26:19,046 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 12:26:19,047 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:19,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 12:26:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16793 states. [2022-11-16 12:26:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16793 to 16793. [2022-11-16 12:26:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 11603 states have (on average 5.277686805136603) internal successors, (61237), 16792 states have internal predecessors, (61237), 0 states have call successors, (0), 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 12:26:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 61237 transitions. [2022-11-16 12:26:19,886 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 61237 transitions. Word has length 3 [2022-11-16 12:26:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:19,886 INFO L495 AbstractCegarLoop]: Abstraction has 16793 states and 61237 transitions. [2022-11-16 12:26:19,887 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 12:26:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 61237 transitions. [2022-11-16 12:26:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:26:19,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:19,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:26:19,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:26:20,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:20,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:20,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2100283534, now seen corresponding path program 1 times [2022-11-16 12:26:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:20,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608248496] [2022-11-16 12:26:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:20,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:26:20,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:20,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:20,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:26:20,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:20,257 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:26:20,265 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 12:26:20,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:20,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608248496] [2022-11-16 12:26:20,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608248496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:20,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:20,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:26:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256391537] [2022-11-16 12:26:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:20,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:26:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:26:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:20,277 INFO L87 Difference]: Start difference. First operand 16793 states and 61237 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:21,349 INFO L93 Difference]: Finished difference Result 16790 states and 61234 transitions. [2022-11-16 12:26:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:26:21,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:26:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:21,465 INFO L225 Difference]: With dead ends: 16790 [2022-11-16 12:26:21,465 INFO L226 Difference]: Without dead ends: 16790 [2022-11-16 12:26:21,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:26:21,467 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:21,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:26:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16790 states. [2022-11-16 12:26:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16790 to 16790. [2022-11-16 12:26:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16790 states, 11603 states have (on average 5.277428251314316) internal successors, (61234), 16789 states have internal predecessors, (61234), 0 states have call successors, (0), 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 12:26:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16790 states to 16790 states and 61234 transitions. [2022-11-16 12:26:22,398 INFO L78 Accepts]: Start accepts. Automaton has 16790 states and 61234 transitions. Word has length 5 [2022-11-16 12:26:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:22,398 INFO L495 AbstractCegarLoop]: Abstraction has 16790 states and 61234 transitions. [2022-11-16 12:26:22,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 16790 states and 61234 transitions. [2022-11-16 12:26:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:26:22,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:22,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:26:22,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Ended with exit code 0 [2022-11-16 12:26:22,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:22,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2100283533, now seen corresponding path program 1 times [2022-11-16 12:26:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372020836] [2022-11-16 12:26:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:22,601 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 12:26:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:22,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:22,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:26:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:22,773 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:26:22,802 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 12:26:22,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:22,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372020836] [2022-11-16 12:26:22,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372020836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:22,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:22,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:26:22,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445848265] [2022-11-16 12:26:22,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:22,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:22,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:22,805 INFO L87 Difference]: Start difference. First operand 16790 states and 61234 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:24,076 INFO L93 Difference]: Finished difference Result 16791 states and 61236 transitions. [2022-11-16 12:26:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:26:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:26:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:24,233 INFO L225 Difference]: With dead ends: 16791 [2022-11-16 12:26:24,234 INFO L226 Difference]: Without dead ends: 16791 [2022-11-16 12:26:24,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:26:24,235 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 91 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:24,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 7 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:26:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16791 states. [2022-11-16 12:26:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16791 to 16791. [2022-11-16 12:26:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16791 states, 11604 states have (on average 5.277145811789039) internal successors, (61236), 16790 states have internal predecessors, (61236), 0 states have call successors, (0), 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 12:26:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 61236 transitions. [2022-11-16 12:26:25,225 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 61236 transitions. Word has length 5 [2022-11-16 12:26:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:25,225 INFO L495 AbstractCegarLoop]: Abstraction has 16791 states and 61236 transitions. [2022-11-16 12:26:25,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:26:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 61236 transitions. [2022-11-16 12:26:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:25,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:25,227 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 12:26:25,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:25,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:25,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash -914195999, now seen corresponding path program 2 times [2022-11-16 12:26:25,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:25,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946301198] [2022-11-16 12:26:25,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:26:25,443 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 12:26:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:25,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:25,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:25,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:26:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:26:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:26:25,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:25,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:26:25,762 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:26:25,944 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 12:26:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:26,714 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 12:26:26,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:26,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946301198] [2022-11-16 12:26:26,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946301198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:26,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:26,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:26:26,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388964404] [2022-11-16 12:26:26,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:26,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:26:26,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:26,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:26:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:26:26,716 INFO L87 Difference]: Start difference. First operand 16791 states and 61236 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 12:26:30,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:32,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:34,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:36,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:38,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:40,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:42,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:44,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:45,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:47,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:51,054 INFO L93 Difference]: Finished difference Result 16811 states and 61273 transitions. [2022-11-16 12:26:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:26:51,055 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 12:26:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:51,155 INFO L225 Difference]: With dead ends: 16811 [2022-11-16 12:26:51,155 INFO L226 Difference]: Without dead ends: 16811 [2022-11-16 12:26:51,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:26:51,156 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 171 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:51,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 689 Invalid, 5 Unknown, 0 Unchecked, 22.5s Time] [2022-11-16 12:26:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16811 states. [2022-11-16 12:26:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16811 to 16806. [2022-11-16 12:26:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 11619 states have (on average 5.273087184783544) internal successors, (61268), 16805 states have internal predecessors, (61268), 0 states have call successors, (0), 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 12:26:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 61268 transitions. [2022-11-16 12:26:51,880 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 61268 transitions. Word has length 6 [2022-11-16 12:26:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:51,881 INFO L495 AbstractCegarLoop]: Abstraction has 16806 states and 61268 transitions. [2022-11-16 12:26:51,881 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 12:26:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 61268 transitions. [2022-11-16 12:26:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:51,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:51,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:26:51,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:52,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:52,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash -684262727, now seen corresponding path program 1 times [2022-11-16 12:26:52,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:52,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771094369] [2022-11-16 12:26:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:52,108 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 12:26:52,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:52,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:52,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:26:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:52,292 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:26:52,314 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 12:26:52,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:26:52,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:52,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771094369] [2022-11-16 12:26:52,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771094369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:26:52,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:26:52,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:26:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700525526] [2022-11-16 12:26:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:26:52,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:26:52,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:26:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:26:52,316 INFO L87 Difference]: Start difference. First operand 16806 states and 61268 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 12:26:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:26:53,423 INFO L93 Difference]: Finished difference Result 16807 states and 61270 transitions. [2022-11-16 12:26:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:26:53,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 12:26:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:26:53,758 INFO L225 Difference]: With dead ends: 16807 [2022-11-16 12:26:53,758 INFO L226 Difference]: Without dead ends: 16807 [2022-11-16 12:26:53,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 12:26:53,760 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:26:53,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 8 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:26:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16807 states. [2022-11-16 12:26:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16807 to 16807. [2022-11-16 12:26:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16807 states, 11620 states have (on average 5.272805507745267) internal successors, (61270), 16806 states have internal predecessors, (61270), 0 states have call successors, (0), 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 12:26:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16807 states to 16807 states and 61270 transitions. [2022-11-16 12:26:54,514 INFO L78 Accepts]: Start accepts. Automaton has 16807 states and 61270 transitions. Word has length 6 [2022-11-16 12:26:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:26:54,514 INFO L495 AbstractCegarLoop]: Abstraction has 16807 states and 61270 transitions. [2022-11-16 12:26:54,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 12:26:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16807 states and 61270 transitions. [2022-11-16 12:26:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:26:54,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:26:54,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:26:54,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:54,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:54,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:26:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:26:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash -684267112, now seen corresponding path program 1 times [2022-11-16 12:26:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:26:54,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841664243] [2022-11-16 12:26:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:26:54,723 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 12:26:54,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:26:54,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:26:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:26:54,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:26:54,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:26:54,890 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:26:54,972 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 12:26:54,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:55,324 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 12:26:55,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:26:55,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841664243] [2022-11-16 12:26:55,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841664243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:55,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:26:55,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:26:55,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198034964] [2022-11-16 12:26:55,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:26:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:26:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:26:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:26:55,327 INFO L87 Difference]: Start difference. First operand 16807 states and 61270 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 12:26:57,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:26:59,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:01,343 INFO L93 Difference]: Finished difference Result 16813 states and 61286 transitions. [2022-11-16 12:27:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:27:01,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 12:27:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:01,447 INFO L225 Difference]: With dead ends: 16813 [2022-11-16 12:27:01,448 INFO L226 Difference]: Without dead ends: 16813 [2022-11-16 12:27:01,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:27:01,449 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 260 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:01,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 9 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 12:27:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16813 states. [2022-11-16 12:27:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16813 to 16813. [2022-11-16 12:27:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 11626 states have (on average 5.271460519525202) internal successors, (61286), 16812 states have internal predecessors, (61286), 0 states have call successors, (0), 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 12:27:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61286 transitions. [2022-11-16 12:27:02,399 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61286 transitions. Word has length 6 [2022-11-16 12:27:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:02,400 INFO L495 AbstractCegarLoop]: Abstraction has 16813 states and 61286 transitions. [2022-11-16 12:27:02,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 12:27:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61286 transitions. [2022-11-16 12:27:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:27:02,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:02,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:02,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:02,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:02,611 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:27:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash 262706836, now seen corresponding path program 1 times [2022-11-16 12:27:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:27:02,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249755071] [2022-11-16 12:27:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:02,613 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 12:27:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:27:02,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:02,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:27:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:02,850 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 12:27:02,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:02,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:27:02,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249755071] [2022-11-16 12:27:02,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249755071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:02,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:02,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637215506] [2022-11-16 12:27:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:02,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:27:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:27:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:27:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:27:02,854 INFO L87 Difference]: Start difference. First operand 16813 states and 61286 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 12:27:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:04,211 INFO L93 Difference]: Finished difference Result 16813 states and 61284 transitions. [2022-11-16 12:27:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:27:04,212 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 12:27:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:04,283 INFO L225 Difference]: With dead ends: 16813 [2022-11-16 12:27:04,283 INFO L226 Difference]: Without dead ends: 16813 [2022-11-16 12:27:04,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:27:04,284 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:04,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 10 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:27:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16813 states. [2022-11-16 12:27:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16813 to 16813. [2022-11-16 12:27:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 11626 states have (on average 5.271288491312575) internal successors, (61284), 16812 states have internal predecessors, (61284), 0 states have call successors, (0), 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 12:27:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61284 transitions. [2022-11-16 12:27:05,010 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61284 transitions. Word has length 7 [2022-11-16 12:27:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:05,011 INFO L495 AbstractCegarLoop]: Abstraction has 16813 states and 61284 transitions. [2022-11-16 12:27:05,011 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 12:27:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61284 transitions. [2022-11-16 12:27:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:27:05,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:05,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:05,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:05,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:27:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash -871234694, now seen corresponding path program 1 times [2022-11-16 12:27:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:27:05,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276557360] [2022-11-16 12:27:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:05,226 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 12:27:05,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:27:05,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:27:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:05,564 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 12:27:05,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:05,794 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 12:27:05,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:27:05,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276557360] [2022-11-16 12:27:05,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276557360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:05,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:27:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-16 12:27:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39008286] [2022-11-16 12:27:05,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:05,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:27:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:27:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:27:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:27:05,809 INFO L87 Difference]: Start difference. First operand 16813 states and 61284 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:27:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:08,624 INFO L93 Difference]: Finished difference Result 33604 states and 122527 transitions. [2022-11-16 12:27:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:27:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:27:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:08,794 INFO L225 Difference]: With dead ends: 33604 [2022-11-16 12:27:08,794 INFO L226 Difference]: Without dead ends: 33604 [2022-11-16 12:27:08,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:27:09,043 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 358 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:09,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 30 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 12:27:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33604 states. [2022-11-16 12:27:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33604 to 16813. [2022-11-16 12:27:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 11626 states have (on average 5.271202477206262) internal successors, (61283), 16812 states have internal predecessors, (61283), 0 states have call successors, (0), 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 12:27:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61283 transitions. [2022-11-16 12:27:09,835 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61283 transitions. Word has length 9 [2022-11-16 12:27:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:09,835 INFO L495 AbstractCegarLoop]: Abstraction has 16813 states and 61283 transitions. [2022-11-16 12:27:09,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:27:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61283 transitions. [2022-11-16 12:27:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:27:09,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:09,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:09,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:27:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:10,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:27:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1238618820, now seen corresponding path program 1 times [2022-11-16 12:27:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:27:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46035563] [2022-11-16 12:27:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:10,052 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 12:27:10,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:27:10,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:10,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:27:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:27:10,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:27:10,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:27:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46035563] [2022-11-16 12:27:10,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46035563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:27:10,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:27:10,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:27:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421229229] [2022-11-16 12:27:10,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:27:10,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:27:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:27:10,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:27:10,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:27:10,270 INFO L87 Difference]: Start difference. First operand 16813 states and 61283 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 12:27:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:11,494 INFO L93 Difference]: Finished difference Result 16813 states and 61282 transitions. [2022-11-16 12:27:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:27:11,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 12:27:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:11,573 INFO L225 Difference]: With dead ends: 16813 [2022-11-16 12:27:11,573 INFO L226 Difference]: Without dead ends: 16813 [2022-11-16 12:27:11,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 12:27:11,574 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:11,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 12 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:27:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16813 states. [2022-11-16 12:27:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16813 to 16813. [2022-11-16 12:27:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 11626 states have (on average 5.271116463099949) internal successors, (61282), 16812 states have internal predecessors, (61282), 0 states have call successors, (0), 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 12:27:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61282 transitions. [2022-11-16 12:27:12,225 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61282 transitions. Word has length 10 [2022-11-16 12:27:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:12,225 INFO L495 AbstractCegarLoop]: Abstraction has 16813 states and 61282 transitions. [2022-11-16 12:27:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 12:27:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61282 transitions. [2022-11-16 12:27:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:27:12,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:12,227 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2022-11-16 12:27:12,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:12,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:27:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1235307539, now seen corresponding path program 1 times [2022-11-16 12:27:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:27:12,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958839572] [2022-11-16 12:27:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:12,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:27:12,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:27:12,443 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:12,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:27:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:12,613 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:27:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:27:13,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:27:15,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:27:15,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958839572] [2022-11-16 12:27:15,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958839572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:15,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:27:15,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:27:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433615582] [2022-11-16 12:27:15,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:27:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:27:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:27:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:27:15,245 INFO L87 Difference]: Start difference. First operand 16813 states and 61282 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 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 12:27:20,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:22,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:24,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:26,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:28,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:30,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:32,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:39,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:41,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:43,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:45,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:47,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:49,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:51,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:27:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:27:57,987 INFO L93 Difference]: Finished difference Result 16828 states and 61309 transitions. [2022-11-16 12:27:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:27:57,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 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 11 [2022-11-16 12:27:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:27:58,058 INFO L225 Difference]: With dead ends: 16828 [2022-11-16 12:27:58,058 INFO L226 Difference]: Without dead ends: 16828 [2022-11-16 12:27:58,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:27:58,059 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 282 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:27:58,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1158 Invalid, 13 Unknown, 0 Unchecked, 36.6s Time] [2022-11-16 12:27:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2022-11-16 12:27:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 16822. [2022-11-16 12:27:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 11635 states have (on average 5.268414267296949) internal successors, (61298), 16821 states have internal predecessors, (61298), 0 states have call successors, (0), 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 12:27:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 61298 transitions. [2022-11-16 12:27:58,632 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 61298 transitions. Word has length 11 [2022-11-16 12:27:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:27:58,632 INFO L495 AbstractCegarLoop]: Abstraction has 16822 states and 61298 transitions. [2022-11-16 12:27:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 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 12:27:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 61298 transitions. [2022-11-16 12:27:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:27:58,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:27:58,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:27:58,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:58,834 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:27:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:27:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash 309269910, now seen corresponding path program 1 times [2022-11-16 12:27:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:27:58,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999870022] [2022-11-16 12:27:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:27:58,837 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 12:27:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:27:58,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:58,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:27:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:27:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:27:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:27:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:27:59,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:27:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:27:59,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:27:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999870022] [2022-11-16 12:27:59,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999870022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:27:59,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:27:59,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 12:27:59,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326887461] [2022-11-16 12:27:59,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:27:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:27:59,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:27:59,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:27:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:27:59,415 INFO L87 Difference]: Start difference. First operand 16822 states and 61298 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 12:28:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:02,236 INFO L93 Difference]: Finished difference Result 33601 states and 122511 transitions. [2022-11-16 12:28:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:28:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 12:28:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:02,455 INFO L225 Difference]: With dead ends: 33601 [2022-11-16 12:28:02,455 INFO L226 Difference]: Without dead ends: 33601 [2022-11-16 12:28:02,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:28:02,456 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 441 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:02,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 36 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 12:28:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33601 states. [2022-11-16 12:28:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33601 to 16822. [2022-11-16 12:28:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 11635 states have (on average 5.268156424581005) internal successors, (61295), 16821 states have internal predecessors, (61295), 0 states have call successors, (0), 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 12:28:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 61295 transitions. [2022-11-16 12:28:03,286 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 61295 transitions. Word has length 11 [2022-11-16 12:28:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:03,286 INFO L495 AbstractCegarLoop]: Abstraction has 16822 states and 61295 transitions. [2022-11-16 12:28:03,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 12:28:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 61295 transitions. [2022-11-16 12:28:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:28:03,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:03,288 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:03,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:03,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:03,489 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:28:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash 309264685, now seen corresponding path program 1 times [2022-11-16 12:28:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303547242] [2022-11-16 12:28:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:03,490 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 12:28:03,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:03,492 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:03,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:03,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:28:03,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:03,710 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:28:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:28:03,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:28:04,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:04,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303547242] [2022-11-16 12:28:04,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303547242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:04,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:04,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-11-16 12:28:04,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322972252] [2022-11-16 12:28:04,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:28:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:28:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:28:04,598 INFO L87 Difference]: Start difference. First operand 16822 states and 61295 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 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 12:28:07,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:08,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:10,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:12,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:14,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:17,493 INFO L93 Difference]: Finished difference Result 33592 states and 122496 transitions. [2022-11-16 12:28:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:28:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 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 11 [2022-11-16 12:28:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:17,731 INFO L225 Difference]: With dead ends: 33592 [2022-11-16 12:28:17,731 INFO L226 Difference]: Without dead ends: 33592 [2022-11-16 12:28:17,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:28:17,732 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 401 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:17,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 9 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 300 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2022-11-16 12:28:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33592 states. [2022-11-16 12:28:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33592 to 16827. [2022-11-16 12:28:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16827 states, 11640 states have (on average 5.26692439862543) internal successors, (61307), 16826 states have internal predecessors, (61307), 0 states have call successors, (0), 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 12:28:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16827 states to 16827 states and 61307 transitions. [2022-11-16 12:28:18,522 INFO L78 Accepts]: Start accepts. Automaton has 16827 states and 61307 transitions. Word has length 11 [2022-11-16 12:28:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:18,522 INFO L495 AbstractCegarLoop]: Abstraction has 16827 states and 61307 transitions. [2022-11-16 12:28:18,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 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 12:28:18,522 INFO L276 IsEmpty]: Start isEmpty. Operand 16827 states and 61307 transitions. [2022-11-16 12:28:18,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:28:18,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:18,523 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 12:28:18,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:18,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:18,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:28:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash -82160287, now seen corresponding path program 3 times [2022-11-16 12:28:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:28:18,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918981554] [2022-11-16 12:28:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:28:18,725 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 12:28:18,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:28:18,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:18,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:28:19,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:28:19,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:28:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:19,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:28:19,301 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:28:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:19,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:23,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:28:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918981554] [2022-11-16 12:28:23,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918981554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:23,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:28:23,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:28:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084882676] [2022-11-16 12:28:23,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:28:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:28:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:28:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:28:23,025 INFO L87 Difference]: Start difference. First operand 16827 states and 61307 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:28:39,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:41,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:43,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:45,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:47,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:49,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:51,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:53,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:55,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:28:57,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:03,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:05,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:07,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:09,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:11,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:13,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:15,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:18,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:20,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:22,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:30,074 INFO L93 Difference]: Finished difference Result 16847 states and 61346 transitions. [2022-11-16 12:29:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:29:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:29:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:30,176 INFO L225 Difference]: With dead ends: 16847 [2022-11-16 12:29:30,177 INFO L226 Difference]: Without dead ends: 16847 [2022-11-16 12:29:30,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:29:30,178 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 661 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:30,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 1761 Invalid, 20 Unknown, 0 Unchecked, 52.0s Time] [2022-11-16 12:29:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16847 states. [2022-11-16 12:29:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16847 to 16841. [2022-11-16 12:29:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16841 states, 11654 states have (on average 5.262999828385103) internal successors, (61335), 16840 states have internal predecessors, (61335), 0 states have call successors, (0), 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 12:29:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16841 states to 16841 states and 61335 transitions. [2022-11-16 12:29:30,775 INFO L78 Accepts]: Start accepts. Automaton has 16841 states and 61335 transitions. Word has length 12 [2022-11-16 12:29:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:30,776 INFO L495 AbstractCegarLoop]: Abstraction has 16841 states and 61335 transitions. [2022-11-16 12:29:30,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:29:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 16841 states and 61335 transitions. [2022-11-16 12:29:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:29:30,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:30,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:30,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:30,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:29:30,979 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:29:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 997433065, now seen corresponding path program 1 times [2022-11-16 12:29:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:29:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687798302] [2022-11-16 12:29:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:30,980 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 12:29:30,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:29:30,981 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:29:30,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:29:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:29:31,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:29:31,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:29:31,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:29:31,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687798302] [2022-11-16 12:29:31,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687798302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:31,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:29:31,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 12:29:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366322846] [2022-11-16 12:29:31,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:31,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:29:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:29:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:29:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:29:31,579 INFO L87 Difference]: Start difference. First operand 16841 states and 61335 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 12:29:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:34,288 INFO L93 Difference]: Finished difference Result 33657 states and 122621 transitions. [2022-11-16 12:29:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:29:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 12 [2022-11-16 12:29:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:34,499 INFO L225 Difference]: With dead ends: 33657 [2022-11-16 12:29:34,499 INFO L226 Difference]: Without dead ends: 33657 [2022-11-16 12:29:34,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:29:34,500 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 451 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:34,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 24 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 12:29:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33657 states. [2022-11-16 12:29:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33657 to 16841. [2022-11-16 12:29:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16841 states, 11654 states have (on average 5.262914020937018) internal successors, (61334), 16840 states have internal predecessors, (61334), 0 states have call successors, (0), 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 12:29:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16841 states to 16841 states and 61334 transitions. [2022-11-16 12:29:35,347 INFO L78 Accepts]: Start accepts. Automaton has 16841 states and 61334 transitions. Word has length 12 [2022-11-16 12:29:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:35,347 INFO L495 AbstractCegarLoop]: Abstraction has 16841 states and 61334 transitions. [2022-11-16 12:29:35,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 12:29:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 16841 states and 61334 transitions. [2022-11-16 12:29:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:29:35,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:35,348 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:35,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Ended with exit code 0 [2022-11-16 12:29:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:29:35,554 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:29:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 869926655, now seen corresponding path program 1 times [2022-11-16 12:29:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:29:35,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325003050] [2022-11-16 12:29:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:35,556 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 12:29:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:29:35,561 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:29:35,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:29:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:29:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:35,819 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:29:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:29:35,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:29:37,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:29:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325003050] [2022-11-16 12:29:37,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325003050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:37,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:29:37,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:29:37,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142767510] [2022-11-16 12:29:37,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:37,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:29:37,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:29:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:29:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:29:37,062 INFO L87 Difference]: Start difference. First operand 16841 states and 61334 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:29:40,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:42,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:44,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:46,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:48,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:50,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:52,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:54,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:29:56,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:30:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:01,949 INFO L93 Difference]: Finished difference Result 33612 states and 122535 transitions. [2022-11-16 12:30:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:30:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:30:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:02,108 INFO L225 Difference]: With dead ends: 33612 [2022-11-16 12:30:02,108 INFO L226 Difference]: Without dead ends: 33612 [2022-11-16 12:30:02,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:30:02,109 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 408 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 70 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:02,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 15 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 499 Invalid, 6 Unknown, 0 Unchecked, 22.7s Time] [2022-11-16 12:30:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33612 states. [2022-11-16 12:30:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33612 to 16847. [2022-11-16 12:30:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16847 states, 11660 states have (on average 5.26123499142367) internal successors, (61346), 16846 states have internal predecessors, (61346), 0 states have call successors, (0), 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 12:30:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16847 states to 16847 states and 61346 transitions. [2022-11-16 12:30:03,071 INFO L78 Accepts]: Start accepts. Automaton has 16847 states and 61346 transitions. Word has length 12 [2022-11-16 12:30:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:03,071 INFO L495 AbstractCegarLoop]: Abstraction has 16847 states and 61346 transitions. [2022-11-16 12:30:03,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:30:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 16847 states and 61346 transitions. [2022-11-16 12:30:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:30:03,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:03,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:03,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Ended with exit code 0 [2022-11-16 12:30:03,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:03,290 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1325441910, now seen corresponding path program 1 times [2022-11-16 12:30:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:03,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457605326] [2022-11-16 12:30:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:03,291 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 12:30:03,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:03,292 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:03,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:30:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:03,800 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 12:30:03,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 12:30:04,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:04,264 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:30:04,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:30:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:04,663 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:30:04,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 60 [2022-11-16 12:30:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:05,140 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:30:05,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 60 [2022-11-16 12:30:05,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:05,597 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:30:05,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 60 [2022-11-16 12:30:06,359 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 12:30:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-16 12:30:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:09,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:09,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457605326] [2022-11-16 12:30:09,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457605326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:09,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:09,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:30:09,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382379990] [2022-11-16 12:30:09,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:09,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:30:09,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:30:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2022-11-16 12:30:09,164 INFO L87 Difference]: Start difference. First operand 16847 states and 61346 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:09,785 INFO L93 Difference]: Finished difference Result 16846 states and 61343 transitions. [2022-11-16 12:30:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:30:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:30:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:09,869 INFO L225 Difference]: With dead ends: 16846 [2022-11-16 12:30:09,869 INFO L226 Difference]: Without dead ends: 16846 [2022-11-16 12:30:09,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2022-11-16 12:30:09,870 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:09,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 157 Unchecked, 0.5s Time] [2022-11-16 12:30:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16846 states. [2022-11-16 12:30:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16846 to 16846. [2022-11-16 12:30:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16846 states, 11660 states have (on average 5.260977701543739) internal successors, (61343), 16845 states have internal predecessors, (61343), 0 states have call successors, (0), 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 12:30:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16846 states to 16846 states and 61343 transitions. [2022-11-16 12:30:10,446 INFO L78 Accepts]: Start accepts. Automaton has 16846 states and 61343 transitions. Word has length 13 [2022-11-16 12:30:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:10,447 INFO L495 AbstractCegarLoop]: Abstraction has 16846 states and 61343 transitions. [2022-11-16 12:30:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 16846 states and 61343 transitions. [2022-11-16 12:30:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:30:10,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:10,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:10,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Ended with exit code 0 [2022-11-16 12:30:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:10,648 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1325441911, now seen corresponding path program 1 times [2022-11-16 12:30:10,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:10,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223824188] [2022-11-16 12:30:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:10,649 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 12:30:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:10,650 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:10,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:11,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:30:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,168 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:30:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 12:30:11,219 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 12:30:11,220 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 90 treesize of output 89 [2022-11-16 12:30:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:11,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:11,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:11,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223824188] [2022-11-16 12:30:11,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223824188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:11,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:11,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:30:11,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142647440] [2022-11-16 12:30:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:11,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:11,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:11,577 INFO L87 Difference]: Start difference. First operand 16846 states and 61343 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:12,449 INFO L93 Difference]: Finished difference Result 13235 states and 46881 transitions. [2022-11-16 12:30:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:12,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:30:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:12,503 INFO L225 Difference]: With dead ends: 13235 [2022-11-16 12:30:12,503 INFO L226 Difference]: Without dead ends: 13235 [2022-11-16 12:30:12,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:12,504 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:12,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 3 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 5 Unchecked, 0.8s Time] [2022-11-16 12:30:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13235 states. [2022-11-16 12:30:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13235 to 13235. [2022-11-16 12:30:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13235 states, 9571 states have (on average 4.898234249294744) internal successors, (46881), 13234 states have internal predecessors, (46881), 0 states have call successors, (0), 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 12:30:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13235 states to 13235 states and 46881 transitions. [2022-11-16 12:30:13,024 INFO L78 Accepts]: Start accepts. Automaton has 13235 states and 46881 transitions. Word has length 13 [2022-11-16 12:30:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:13,024 INFO L495 AbstractCegarLoop]: Abstraction has 13235 states and 46881 transitions. [2022-11-16 12:30:13,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13235 states and 46881 transitions. [2022-11-16 12:30:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:13,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:13,026 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:13,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:13,226 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1855597552, now seen corresponding path program 1 times [2022-11-16 12:30:13,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14962372] [2022-11-16 12:30:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:13,227 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 12:30:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:13,228 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:13,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:30:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:13,533 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:30:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:30:13,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:30:14,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:14,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14962372] [2022-11-16 12:30:14,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14962372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:14,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:30:14,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-16 12:30:14,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877593452] [2022-11-16 12:30:14,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:14,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:30:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:30:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:30:14,604 INFO L87 Difference]: Start difference. First operand 13235 states and 46881 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:19,192 INFO L93 Difference]: Finished difference Result 26410 states and 93649 transitions. [2022-11-16 12:30:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:30:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:30:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:19,313 INFO L225 Difference]: With dead ends: 26410 [2022-11-16 12:30:19,313 INFO L226 Difference]: Without dead ends: 26410 [2022-11-16 12:30:19,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:30:19,314 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 445 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:19,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 39 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 12:30:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2022-11-16 12:30:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 13255. [2022-11-16 12:30:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 9591 states have (on average 4.891982066520696) internal successors, (46919), 13254 states have internal predecessors, (46919), 0 states have call successors, (0), 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 12:30:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 46919 transitions. [2022-11-16 12:30:19,910 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 46919 transitions. Word has length 15 [2022-11-16 12:30:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:19,910 INFO L495 AbstractCegarLoop]: Abstraction has 13255 states and 46919 transitions. [2022-11-16 12:30:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 46919 transitions. [2022-11-16 12:30:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:19,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:19,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:19,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:20,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:20,111 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1855562280, now seen corresponding path program 1 times [2022-11-16 12:30:20,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:20,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804786858] [2022-11-16 12:30:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:20,112 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 12:30:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:20,114 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:20,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:30:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:20,666 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:30:20,684 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:30:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:20,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:20,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:20,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:21,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:21,054 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:21,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:21,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:21,159 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:21,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:21,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:21,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:21,282 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:30:21,282 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 13 treesize of output 13 [2022-11-16 12:30:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:30:21,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:36,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:30:36,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:30:36,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:30:36,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:30:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:30:36,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804786858] [2022-11-16 12:30:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804786858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:36,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:30:36,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2022-11-16 12:30:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315284415] [2022-11-16 12:30:36,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:30:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:30:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=112, Unknown=4, NotChecked=0, Total=156 [2022-11-16 12:30:36,906 INFO L87 Difference]: Start difference. First operand 13255 states and 46919 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 12:30:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:40,372 INFO L93 Difference]: Finished difference Result 23047 states and 81075 transitions. [2022-11-16 12:30:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:30:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2022-11-16 12:30:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:40,648 INFO L225 Difference]: With dead ends: 23047 [2022-11-16 12:30:40,649 INFO L226 Difference]: Without dead ends: 23047 [2022-11-16 12:30:40,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=40, Invalid=112, Unknown=4, NotChecked=0, Total=156 [2022-11-16 12:30:40,650 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 153 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:40,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 7 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 291 Invalid, 0 Unknown, 483 Unchecked, 3.3s Time] [2022-11-16 12:30:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23047 states. [2022-11-16 12:30:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23047 to 12225. [2022-11-16 12:30:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12225 states, 9081 states have (on average 4.721616562052637) internal successors, (42877), 12224 states have internal predecessors, (42877), 0 states have call successors, (0), 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 12:30:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12225 states to 12225 states and 42877 transitions. [2022-11-16 12:30:41,005 INFO L78 Accepts]: Start accepts. Automaton has 12225 states and 42877 transitions. Word has length 15 [2022-11-16 12:30:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:41,006 INFO L495 AbstractCegarLoop]: Abstraction has 12225 states and 42877 transitions. [2022-11-16 12:30:41,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 12:30:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12225 states and 42877 transitions. [2022-11-16 12:30:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:41,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:41,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:41,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:41,209 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1855562279, now seen corresponding path program 1 times [2022-11-16 12:30:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:41,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123224349] [2022-11-16 12:30:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:41,210 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 12:30:41,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:41,211 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:41,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:30:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:41,707 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:30:41,753 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:41,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:41,806 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:41,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:41,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:41,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:41,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:30:41,874 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:30:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:41,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:41,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123224349] [2022-11-16 12:30:41,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123224349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:41,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:41,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:30:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481126691] [2022-11-16 12:30:41,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:41,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:30:41,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:30:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:30:41,923 INFO L87 Difference]: Start difference. First operand 12225 states and 42877 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:42,759 INFO L93 Difference]: Finished difference Result 9755 states and 33917 transitions. [2022-11-16 12:30:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:30:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:30:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:42,791 INFO L225 Difference]: With dead ends: 9755 [2022-11-16 12:30:42,791 INFO L226 Difference]: Without dead ends: 9755 [2022-11-16 12:30:42,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:42,792 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 214 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:42,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 2 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:30:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2022-11-16 12:30:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 9755. [2022-11-16 12:30:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9755 states, 7531 states have (on average 4.5036515734962155) internal successors, (33917), 9754 states have internal predecessors, (33917), 0 states have call successors, (0), 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 12:30:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9755 states to 9755 states and 33917 transitions. [2022-11-16 12:30:42,998 INFO L78 Accepts]: Start accepts. Automaton has 9755 states and 33917 transitions. Word has length 15 [2022-11-16 12:30:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:42,998 INFO L495 AbstractCegarLoop]: Abstraction has 9755 states and 33917 transitions. [2022-11-16 12:30:42,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 9755 states and 33917 transitions. [2022-11-16 12:30:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:42,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:42,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:43,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:43,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:43,201 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1855562258, now seen corresponding path program 1 times [2022-11-16 12:30:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:43,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15006873] [2022-11-16 12:30:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:43,202 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 12:30:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:43,205 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:43,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:30:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:43,669 INFO L321 Elim1Store]: treesize reduction 87, result has 20.2 percent of original size [2022-11-16 12:30:43,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 12:30:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:43,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:43,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-16 12:30:43,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:43,993 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:30:43,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:30:44,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:44,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:30:44,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:44,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:30:44,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:44,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:30:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:44,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:44,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:44,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15006873] [2022-11-16 12:30:44,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15006873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:44,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:44,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:30:44,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133802979] [2022-11-16 12:30:44,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:44,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:30:44,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:30:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:30:44,892 INFO L87 Difference]: Start difference. First operand 9755 states and 33917 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:45,375 INFO L93 Difference]: Finished difference Result 9752 states and 33906 transitions. [2022-11-16 12:30:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:30:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:30:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:45,408 INFO L225 Difference]: With dead ends: 9752 [2022-11-16 12:30:45,408 INFO L226 Difference]: Without dead ends: 9752 [2022-11-16 12:30:45,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:30:45,409 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:45,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-11-16 12:30:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9752 states. [2022-11-16 12:30:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9752 to 9752. [2022-11-16 12:30:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9752 states, 7529 states have (on average 4.503386903971311) internal successors, (33906), 9751 states have internal predecessors, (33906), 0 states have call successors, (0), 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 12:30:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9752 states to 9752 states and 33906 transitions. [2022-11-16 12:30:45,614 INFO L78 Accepts]: Start accepts. Automaton has 9752 states and 33906 transitions. Word has length 15 [2022-11-16 12:30:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:45,614 INFO L495 AbstractCegarLoop]: Abstraction has 9752 states and 33906 transitions. [2022-11-16 12:30:45,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9752 states and 33906 transitions. [2022-11-16 12:30:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:45,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:45,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:45,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:45,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:45,829 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:45,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1855562256, now seen corresponding path program 1 times [2022-11-16 12:30:45,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:45,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336641760] [2022-11-16 12:30:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:45,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:30:45,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:45,831 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:46,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:30:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:46,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,393 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:30:46,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 12:30:46,412 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 12:30:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:46,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:30:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:46,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:46,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336641760] [2022-11-16 12:30:46,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336641760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:46,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:46,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:30:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800464166] [2022-11-16 12:30:46,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:46,745 INFO L87 Difference]: Start difference. First operand 9752 states and 33906 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:47,489 INFO L93 Difference]: Finished difference Result 9575 states and 33402 transitions. [2022-11-16 12:30:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:30:47,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:47,518 INFO L225 Difference]: With dead ends: 9575 [2022-11-16 12:30:47,519 INFO L226 Difference]: Without dead ends: 9575 [2022-11-16 12:30:47,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:47,519 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 142 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:47,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 2 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 5 Unchecked, 0.6s Time] [2022-11-16 12:30:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2022-11-16 12:30:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 9575. [2022-11-16 12:30:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9575 states, 7452 states have (on average 4.482286634460547) internal successors, (33402), 9574 states have internal predecessors, (33402), 0 states have call successors, (0), 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 12:30:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9575 states to 9575 states and 33402 transitions. [2022-11-16 12:30:47,701 INFO L78 Accepts]: Start accepts. Automaton has 9575 states and 33402 transitions. Word has length 15 [2022-11-16 12:30:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:47,701 INFO L495 AbstractCegarLoop]: Abstraction has 9575 states and 33402 transitions. [2022-11-16 12:30:47,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9575 states and 33402 transitions. [2022-11-16 12:30:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:47,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:47,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:47,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Ended with exit code 0 [2022-11-16 12:30:47,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:47,916 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1855562926, now seen corresponding path program 1 times [2022-11-16 12:30:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671155359] [2022-11-16 12:30:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:47,917 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 12:30:47,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:47,918 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:47,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:48,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:30:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:48,381 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:30:48,381 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:30:48,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:48,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:48,452 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:48,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:48,480 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:48,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:48,507 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:48,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:48,526 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:30:48,527 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:30:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:30:48,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:48,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:30:48,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671155359] [2022-11-16 12:30:48,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671155359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:48,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:48,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:30:48,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548462162] [2022-11-16 12:30:48,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:48,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:48,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:30:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:48,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:48,545 INFO L87 Difference]: Start difference. First operand 9575 states and 33402 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:49,271 INFO L93 Difference]: Finished difference Result 7712 states and 26666 transitions. [2022-11-16 12:30:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:30:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:30:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:49,297 INFO L225 Difference]: With dead ends: 7712 [2022-11-16 12:30:49,297 INFO L226 Difference]: Without dead ends: 7712 [2022-11-16 12:30:49,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 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 12:30:49,298 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 134 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:49,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:30:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7712 states. [2022-11-16 12:30:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7712 to 7712. [2022-11-16 12:30:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7712 states, 6163 states have (on average 4.326788901509006) internal successors, (26666), 7711 states have internal predecessors, (26666), 0 states have call successors, (0), 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 12:30:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 26666 transitions. [2022-11-16 12:30:49,543 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 26666 transitions. Word has length 15 [2022-11-16 12:30:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:49,543 INFO L495 AbstractCegarLoop]: Abstraction has 7712 states and 26666 transitions. [2022-11-16 12:30:49,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 26666 transitions. [2022-11-16 12:30:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:30:49,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:49,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:49,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:49,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:49,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:30:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1855562925, now seen corresponding path program 1 times [2022-11-16 12:30:49,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:30:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141384208] [2022-11-16 12:30:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:49,748 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 12:30:49,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:30:49,749 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:49,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:30:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:30:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:50,370 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:30:50,370 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:30:50,556 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:30:50,556 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:30:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:50,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:50,760 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:30:50,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:30:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:50,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:50,963 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 12:30:50,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 12:30:51,288 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-16 12:30:51,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-16 12:30:51,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:51,570 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-16 12:30:51,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-16 12:30:51,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:30:51,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:30:51,798 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-11-16 12:30:51,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 12:30:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:30:51,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:31:07,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:07,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141384208] [2022-11-16 12:31:07,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141384208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:07,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:31:07,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-16 12:31:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762253629] [2022-11-16 12:31:07,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:07,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:31:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:31:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=111, Unknown=3, NotChecked=0, Total=156 [2022-11-16 12:31:07,546 INFO L87 Difference]: Start difference. First operand 7712 states and 26666 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 12:31:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:09,287 INFO L93 Difference]: Finished difference Result 7597 states and 25243 transitions. [2022-11-16 12:31:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:31:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2022-11-16 12:31:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:09,317 INFO L225 Difference]: With dead ends: 7597 [2022-11-16 12:31:09,318 INFO L226 Difference]: Without dead ends: 7597 [2022-11-16 12:31:09,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=42, Invalid=111, Unknown=3, NotChecked=0, Total=156 [2022-11-16 12:31:09,318 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:09,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 2 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 229 Invalid, 0 Unknown, 473 Unchecked, 1.7s Time] [2022-11-16 12:31:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2022-11-16 12:31:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 7465. [2022-11-16 12:31:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 6097 states have (on average 4.098081023454157) internal successors, (24986), 7464 states have internal predecessors, (24986), 0 states have call successors, (0), 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 12:31:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 24986 transitions. [2022-11-16 12:31:09,524 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 24986 transitions. Word has length 15 [2022-11-16 12:31:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:09,524 INFO L495 AbstractCegarLoop]: Abstraction has 7465 states and 24986 transitions. [2022-11-16 12:31:09,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 12:31:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 24986 transitions. [2022-11-16 12:31:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:31:09,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:09,525 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:09,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:09,727 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:31:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash 206050294, now seen corresponding path program 2 times [2022-11-16 12:31:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:31:09,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120507634] [2022-11-16 12:31:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:31:09,728 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 12:31:09,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:31:09,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:09,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:10,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:31:10,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:31:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:31:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:10,139 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:31:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:31:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:31:11,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120507634] [2022-11-16 12:31:11,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120507634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:11,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:31:11,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-16 12:31:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030386993] [2022-11-16 12:31:11,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:11,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:31:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:31:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:31:11,128 INFO L87 Difference]: Start difference. First operand 7465 states and 24986 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:13,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:15,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:17,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:19,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:21,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:23,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:25,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:27,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:31:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:34,779 INFO L93 Difference]: Finished difference Result 50571 states and 171660 transitions. [2022-11-16 12:31:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:31:34,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:31:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:35,004 INFO L225 Difference]: With dead ends: 50571 [2022-11-16 12:31:35,004 INFO L226 Difference]: Without dead ends: 50571 [2022-11-16 12:31:35,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:31:35,005 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1492 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 35 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:35,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 0 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1016 Invalid, 3 Unknown, 0 Unchecked, 22.0s Time] [2022-11-16 12:31:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50571 states. [2022-11-16 12:31:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50571 to 7485. [2022-11-16 12:31:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7485 states, 6117 states have (on average 4.091221186856302) internal successors, (25026), 7484 states have internal predecessors, (25026), 0 states have call successors, (0), 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 12:31:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 25026 transitions. [2022-11-16 12:31:35,498 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 25026 transitions. Word has length 16 [2022-11-16 12:31:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 7485 states and 25026 transitions. [2022-11-16 12:31:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 25026 transitions. [2022-11-16 12:31:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:31:35,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:35,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:35,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:35,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:35,711 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:31:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1687866735, now seen corresponding path program 1 times [2022-11-16 12:31:35,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:31:35,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453853587] [2022-11-16 12:31:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:35,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:31:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:31:35,713 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:35,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:31:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:36,227 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:31:36,228 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-16 12:31:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:31:36,505 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:31:36,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 54 [2022-11-16 12:31:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:31:36,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:31:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:31:36,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:31:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:31:36,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:31:36,831 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:31:36,831 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:31:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:31:37,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:31:37,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453853587] [2022-11-16 12:31:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453853587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:31:37,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:31:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:31:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742484881] [2022-11-16 12:31:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:31:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:31:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:31:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:31:37,080 INFO L87 Difference]: Start difference. First operand 7485 states and 25026 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 12:31:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:37,614 INFO L93 Difference]: Finished difference Result 7484 states and 25021 transitions. [2022-11-16 12:31:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:31:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 16 [2022-11-16 12:31:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:37,643 INFO L225 Difference]: With dead ends: 7484 [2022-11-16 12:31:37,643 INFO L226 Difference]: Without dead ends: 7484 [2022-11-16 12:31:37,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:31:37,644 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:37,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 145 Unchecked, 0.5s Time] [2022-11-16 12:31:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7484 states. [2022-11-16 12:31:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7484 to 7484. [2022-11-16 12:31:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7484 states, 6116 states have (on average 4.09107259646828) internal successors, (25021), 7483 states have internal predecessors, (25021), 0 states have call successors, (0), 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 12:31:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7484 states to 7484 states and 25021 transitions. [2022-11-16 12:31:37,847 INFO L78 Accepts]: Start accepts. Automaton has 7484 states and 25021 transitions. Word has length 16 [2022-11-16 12:31:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:37,847 INFO L495 AbstractCegarLoop]: Abstraction has 7484 states and 25021 transitions. [2022-11-16 12:31:37,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 12:31:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7484 states and 25021 transitions. [2022-11-16 12:31:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:31:37,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:37,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:37,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:38,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:38,049 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:31:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1687866653, now seen corresponding path program 1 times [2022-11-16 12:31:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:31:38,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343836331] [2022-11-16 12:31:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:38,050 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 12:31:38,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:31:38,051 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:38,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:31:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:38,411 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:31:38,444 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:31:38,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:31:38,473 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:31:38,473 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:31:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:31:38,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:31:38,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:38,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343836331] [2022-11-16 12:31:38,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343836331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:31:38,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:31:38,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:31:38,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774975249] [2022-11-16 12:31:38,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:31:38,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:31:38,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:38,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:31:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:31:38,496 INFO L87 Difference]: Start difference. First operand 7484 states and 25021 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 12:31:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:39,234 INFO L93 Difference]: Finished difference Result 6348 states and 20967 transitions. [2022-11-16 12:31:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:31:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 16 [2022-11-16 12:31:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:39,257 INFO L225 Difference]: With dead ends: 6348 [2022-11-16 12:31:39,257 INFO L226 Difference]: Without dead ends: 6348 [2022-11-16 12:31:39,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 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 12:31:39,258 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:39,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 3 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:31:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2022-11-16 12:31:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6348. [2022-11-16 12:31:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 5293 states have (on average 3.961269601360287) internal successors, (20967), 6347 states have internal predecessors, (20967), 0 states have call successors, (0), 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 12:31:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 20967 transitions. [2022-11-16 12:31:39,435 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 20967 transitions. Word has length 16 [2022-11-16 12:31:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:39,435 INFO L495 AbstractCegarLoop]: Abstraction has 6348 states and 20967 transitions. [2022-11-16 12:31:39,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 12:31:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 20967 transitions. [2022-11-16 12:31:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:31:39,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:39,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:39,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:39,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:39,637 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:31:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1687866652, now seen corresponding path program 1 times [2022-11-16 12:31:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:31:39,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123102448] [2022-11-16 12:31:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:39,638 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 12:31:39,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:31:39,639 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:31:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:40,224 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:31:40,246 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:31:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:31:40,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:31:40,389 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:31:40,389 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 13 treesize of output 13 [2022-11-16 12:31:40,547 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:31:40,548 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 12:31:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:31:40,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:43,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:31:43,820 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 12:31:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:31:44,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:44,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123102448] [2022-11-16 12:31:44,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123102448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:44,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:31:44,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:31:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479446117] [2022-11-16 12:31:44,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:31:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:31:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:31:44,429 INFO L87 Difference]: Start difference. First operand 6348 states and 20967 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:31:50,909 INFO L93 Difference]: Finished difference Result 10402 states and 34022 transitions. [2022-11-16 12:31:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:31:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:31:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:31:50,957 INFO L225 Difference]: With dead ends: 10402 [2022-11-16 12:31:50,957 INFO L226 Difference]: Without dead ends: 10402 [2022-11-16 12:31:50,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:31:50,958 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 288 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:31:50,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 6 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 981 Invalid, 0 Unknown, 310 Unchecked, 5.8s Time] [2022-11-16 12:31:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2022-11-16 12:31:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 7101. [2022-11-16 12:31:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 6046 states have (on average 3.9320211710221633) internal successors, (23773), 7100 states have internal predecessors, (23773), 0 states have call successors, (0), 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 12:31:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 23773 transitions. [2022-11-16 12:31:51,256 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 23773 transitions. Word has length 16 [2022-11-16 12:31:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:31:51,256 INFO L495 AbstractCegarLoop]: Abstraction has 7101 states and 23773 transitions. [2022-11-16 12:31:51,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 23773 transitions. [2022-11-16 12:31:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:31:51,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:31:51,258 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:51,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:51,460 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:31:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1935505408, now seen corresponding path program 1 times [2022-11-16 12:31:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:31:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666187842] [2022-11-16 12:31:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:51,461 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 12:31:51,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:31:51,462 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:51,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:31:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:31:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:51,773 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:31:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:31:52,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:31:54,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:31:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666187842] [2022-11-16 12:31:54,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666187842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:54,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:31:54,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-11-16 12:31:54,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036749987] [2022-11-16 12:31:54,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:54,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:31:54,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:31:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:31:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:31:54,332 INFO L87 Difference]: Start difference. First operand 7101 states and 23773 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 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 12:31:59,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:32:01,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:32:03,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:32:05,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:32:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:14,343 INFO L93 Difference]: Finished difference Result 7197 states and 23965 transitions. [2022-11-16 12:32:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:32:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 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 16 [2022-11-16 12:32:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:14,377 INFO L225 Difference]: With dead ends: 7197 [2022-11-16 12:32:14,378 INFO L226 Difference]: Without dead ends: 7197 [2022-11-16 12:32:14,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:32:14,381 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 119 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:14,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 776 Invalid, 4 Unknown, 0 Unchecked, 14.2s Time] [2022-11-16 12:32:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7197 states. [2022-11-16 12:32:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7197 to 7197. [2022-11-16 12:32:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 6142 states have (on average 3.901823510257245) internal successors, (23965), 7196 states have internal predecessors, (23965), 0 states have call successors, (0), 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 12:32:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 23965 transitions. [2022-11-16 12:32:14,596 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 23965 transitions. Word has length 16 [2022-11-16 12:32:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:14,597 INFO L495 AbstractCegarLoop]: Abstraction has 7197 states and 23965 transitions. [2022-11-16 12:32:14,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 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 12:32:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 23965 transitions. [2022-11-16 12:32:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:14,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:14,599 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:14,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:14,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:14,800 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1345613011, now seen corresponding path program 2 times [2022-11-16 12:32:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:14,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547311178] [2022-11-16 12:32:14,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:14,801 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 12:32:14,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:14,808 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:14,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:15,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:15,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:32:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:15,313 INFO L321 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2022-11-16 12:32:15,314 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 3 case distinctions, treesize of input 19 treesize of output 46 [2022-11-16 12:32:15,526 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:32:15,526 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:32:15,773 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:15,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:15,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:15,976 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:15,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:15,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:16,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:16,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:16,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:16,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:16,245 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:16,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:16,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:16,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:16,359 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:32:16,360 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 13 treesize of output 13 [2022-11-16 12:32:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:32:16,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:16,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:16,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547311178] [2022-11-16 12:32:16,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547311178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:16,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:16,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:32:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641762785] [2022-11-16 12:32:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:16,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:32:16,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:32:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:32:16,495 INFO L87 Difference]: Start difference. First operand 7197 states and 23965 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:17,641 INFO L93 Difference]: Finished difference Result 6131 states and 20925 transitions. [2022-11-16 12:32:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:32:17,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:17,668 INFO L225 Difference]: With dead ends: 6131 [2022-11-16 12:32:17,668 INFO L226 Difference]: Without dead ends: 6131 [2022-11-16 12:32:17,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:32:17,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:17,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:32:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2022-11-16 12:32:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 5837. [2022-11-16 12:32:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5837 states, 5054 states have (on average 3.937079540957657) internal successors, (19898), 5836 states have internal predecessors, (19898), 0 states have call successors, (0), 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 12:32:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 19898 transitions. [2022-11-16 12:32:17,838 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 19898 transitions. Word has length 17 [2022-11-16 12:32:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:17,839 INFO L495 AbstractCegarLoop]: Abstraction has 5837 states and 19898 transitions. [2022-11-16 12:32:17,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 19898 transitions. [2022-11-16 12:32:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:17,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:17,840 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:17,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:18,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:18,041 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash -868428840, now seen corresponding path program 2 times [2022-11-16 12:32:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:18,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857946475] [2022-11-16 12:32:18,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:18,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:18,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:18,043 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:18,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:18,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:18,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:18,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:32:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:18,445 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:32:18,472 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:32:18,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:18,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:32:18,604 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:18,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:18,771 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 12:32:18,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:32:18,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:32:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:32:18,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:18,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:18,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857946475] [2022-11-16 12:32:18,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857946475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:18,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:18,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:32:18,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090954771] [2022-11-16 12:32:18,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:18,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:32:18,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:32:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:32:18,960 INFO L87 Difference]: Start difference. First operand 5837 states and 19898 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 12:32:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:20,062 INFO L93 Difference]: Finished difference Result 4896 states and 17022 transitions. [2022-11-16 12:32:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:32:20,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 17 [2022-11-16 12:32:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:20,081 INFO L225 Difference]: With dead ends: 4896 [2022-11-16 12:32:20,081 INFO L226 Difference]: Without dead ends: 4896 [2022-11-16 12:32:20,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:20,082 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 169 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:20,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 70 Unchecked, 1.0s Time] [2022-11-16 12:32:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2022-11-16 12:32:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4111. [2022-11-16 12:32:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4111 states, 3561 states have (on average 3.8357203032855938) internal successors, (13659), 4110 states have internal predecessors, (13659), 0 states have call successors, (0), 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 12:32:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 13659 transitions. [2022-11-16 12:32:20,198 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 13659 transitions. Word has length 17 [2022-11-16 12:32:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:20,198 INFO L495 AbstractCegarLoop]: Abstraction has 4111 states and 13659 transitions. [2022-11-16 12:32:20,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 12:32:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 13659 transitions. [2022-11-16 12:32:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:20,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:20,199 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:20,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:20,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:20,400 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1500064408, now seen corresponding path program 2 times [2022-11-16 12:32:20,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:20,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139330526] [2022-11-16 12:32:20,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:20,402 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 12:32:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:20,403 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:20,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:20,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:20,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:32:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:20,744 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:32:20,753 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 12:32:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:20,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:20,929 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:20,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:21,150 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 12:32:21,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 12:32:21,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:21,329 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 12:32:21,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 12:32:21,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:21,465 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:32:21,465 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 12:32:21,545 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 12:32:21,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:32:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:32:21,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:21,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139330526] [2022-11-16 12:32:21,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139330526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:21,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:21,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:32:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866114138] [2022-11-16 12:32:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:21,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:32:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:32:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:32:21,714 INFO L87 Difference]: Start difference. First operand 4111 states and 13659 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:22,601 INFO L93 Difference]: Finished difference Result 3540 states and 12164 transitions. [2022-11-16 12:32:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:32:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:22,614 INFO L225 Difference]: With dead ends: 3540 [2022-11-16 12:32:22,614 INFO L226 Difference]: Without dead ends: 3540 [2022-11-16 12:32:22,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:32:22,614 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:22,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 62 Unchecked, 0.9s Time] [2022-11-16 12:32:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2022-11-16 12:32:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3415. [2022-11-16 12:32:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3027 states have (on average 3.8873472084572183) internal successors, (11767), 3414 states have internal predecessors, (11767), 0 states have call successors, (0), 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 12:32:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 11767 transitions. [2022-11-16 12:32:22,705 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 11767 transitions. Word has length 17 [2022-11-16 12:32:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:22,705 INFO L495 AbstractCegarLoop]: Abstraction has 3415 states and 11767 transitions. [2022-11-16 12:32:22,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 11767 transitions. [2022-11-16 12:32:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:22,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:22,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:22,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:22,907 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:22,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash -784259767, now seen corresponding path program 1 times [2022-11-16 12:32:22,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:22,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926314151] [2022-11-16 12:32:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:22,908 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 12:32:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:22,909 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:22,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:32:23,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:23,455 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:32:23,456 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-16 12:32:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:23,764 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:32:23,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 54 [2022-11-16 12:32:23,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:23,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:32:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:23,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:32:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:24,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:32:24,213 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:32:24,214 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:32:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:24,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:24,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926314151] [2022-11-16 12:32:24,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926314151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:24,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:24,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:32:24,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483769349] [2022-11-16 12:32:24,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:24,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:32:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:32:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:32:24,576 INFO L87 Difference]: Start difference. First operand 3415 states and 11767 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:32:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:25,478 INFO L93 Difference]: Finished difference Result 3414 states and 11762 transitions. [2022-11-16 12:32:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:32:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:25,489 INFO L225 Difference]: With dead ends: 3414 [2022-11-16 12:32:25,490 INFO L226 Difference]: Without dead ends: 3414 [2022-11-16 12:32:25,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:32:25,490 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:25,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 241 Unchecked, 0.7s Time] [2022-11-16 12:32:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2022-11-16 12:32:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 3414. [2022-11-16 12:32:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3026 states have (on average 3.8869795109054857) internal successors, (11762), 3413 states have internal predecessors, (11762), 0 states have call successors, (0), 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 12:32:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 11762 transitions. [2022-11-16 12:32:25,561 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 11762 transitions. Word has length 17 [2022-11-16 12:32:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:25,561 INFO L495 AbstractCegarLoop]: Abstraction has 3414 states and 11762 transitions. [2022-11-16 12:32:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:32:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 11762 transitions. [2022-11-16 12:32:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:25,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:25,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:25,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:25,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:25,763 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash -784259815, now seen corresponding path program 1 times [2022-11-16 12:32:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140582525] [2022-11-16 12:32:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:25,764 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 12:32:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:25,765 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:25,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:32:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:26,391 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:32:26,403 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:32:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:26,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:32:26,546 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:32:26,546 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 13 treesize of output 13 [2022-11-16 12:32:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:32:26,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:32:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:32:27,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:27,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140582525] [2022-11-16 12:32:27,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140582525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:27,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:27,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-11-16 12:32:27,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635293491] [2022-11-16 12:32:27,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:27,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:32:27,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:32:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:32:27,603 INFO L87 Difference]: Start difference. First operand 3414 states and 11762 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 12:32:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:32,941 INFO L93 Difference]: Finished difference Result 5731 states and 19793 transitions. [2022-11-16 12:32:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:32:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:32,962 INFO L225 Difference]: With dead ends: 5731 [2022-11-16 12:32:32,962 INFO L226 Difference]: Without dead ends: 5731 [2022-11-16 12:32:32,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=74, Invalid=165, Unknown=1, NotChecked=0, Total=240 [2022-11-16 12:32:32,963 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 416 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:32,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 0 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 460 Invalid, 0 Unknown, 127 Unchecked, 2.7s Time] [2022-11-16 12:32:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2022-11-16 12:32:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 2887. [2022-11-16 12:32:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2637 states have (on average 3.768297307546454) internal successors, (9937), 2886 states have internal predecessors, (9937), 0 states have call successors, (0), 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 12:32:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 9937 transitions. [2022-11-16 12:32:33,043 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 9937 transitions. Word has length 17 [2022-11-16 12:32:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:33,044 INFO L495 AbstractCegarLoop]: Abstraction has 2887 states and 9937 transitions. [2022-11-16 12:32:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 12:32:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 9937 transitions. [2022-11-16 12:32:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:33,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:33,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:33,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:33,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:33,245 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -784259814, now seen corresponding path program 1 times [2022-11-16 12:32:33,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:33,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535758433] [2022-11-16 12:32:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:33,246 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 12:32:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:33,247 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:33,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:32:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:33,675 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:32:33,709 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:33,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:33,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:33,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535758433] [2022-11-16 12:32:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535758433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:33,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:33,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:32:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071980671] [2022-11-16 12:32:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:33,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:32:33,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:32:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:33,737 INFO L87 Difference]: Start difference. First operand 2887 states and 9937 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:32:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:34,348 INFO L93 Difference]: Finished difference Result 2404 states and 8262 transitions. [2022-11-16 12:32:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:32:34,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:34,356 INFO L225 Difference]: With dead ends: 2404 [2022-11-16 12:32:34,356 INFO L226 Difference]: Without dead ends: 2404 [2022-11-16 12:32:34,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 12:32:34,356 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:34,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:32:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-11-16 12:32:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2404. [2022-11-16 12:32:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2268 states have (on average 3.642857142857143) internal successors, (8262), 2403 states have internal predecessors, (8262), 0 states have call successors, (0), 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 12:32:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 8262 transitions. [2022-11-16 12:32:34,401 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 8262 transitions. Word has length 17 [2022-11-16 12:32:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:34,401 INFO L495 AbstractCegarLoop]: Abstraction has 2404 states and 8262 transitions. [2022-11-16 12:32:34,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:32:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 8262 transitions. [2022-11-16 12:32:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:34,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:34,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:34,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:34,602 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash -783850939, now seen corresponding path program 1 times [2022-11-16 12:32:34,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:34,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367199020] [2022-11-16 12:32:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:34,603 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 12:32:34,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:34,604 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:34,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (39)] Waiting until timeout for monitored process [2022-11-16 12:32:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:32:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:35,056 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:32:35,093 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:35,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:35,121 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:32:35,122 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:32:35,153 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:32:35,153 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:32:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:35,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:35,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367199020] [2022-11-16 12:32:35,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367199020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:35,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:35,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:32:35,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750168563] [2022-11-16 12:32:35,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:32:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:32:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:35,179 INFO L87 Difference]: Start difference. First operand 2404 states and 8262 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:32:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:35,788 INFO L93 Difference]: Finished difference Result 1792 states and 6055 transitions. [2022-11-16 12:32:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:32:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:35,793 INFO L225 Difference]: With dead ends: 1792 [2022-11-16 12:32:35,794 INFO L226 Difference]: Without dead ends: 1792 [2022-11-16 12:32:35,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 2 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 12:32:35,794 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:35,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:32:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-11-16 12:32:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1792. [2022-11-16 12:32:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1707 states have (on average 3.547158758055067) internal successors, (6055), 1791 states have internal predecessors, (6055), 0 states have call successors, (0), 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 12:32:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6055 transitions. [2022-11-16 12:32:35,826 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6055 transitions. Word has length 17 [2022-11-16 12:32:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:35,826 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 6055 transitions. [2022-11-16 12:32:35,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:32:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6055 transitions. [2022-11-16 12:32:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:35,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:35,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:35,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:36,027 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -783850938, now seen corresponding path program 1 times [2022-11-16 12:32:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:36,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840884721] [2022-11-16 12:32:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:36,028 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 12:32:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:36,029 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:36,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (40)] Waiting until timeout for monitored process [2022-11-16 12:32:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:32:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:36,695 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:32:36,707 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:32:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:36,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:36,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:36,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:32:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:37,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:37,190 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 12:32:37,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 12:32:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:37,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:32:37,383 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 12:32:37,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:32:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:32:37,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:32:47,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:32:47,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:32:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:32:47,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:47,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840884721] [2022-11-16 12:32:47,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840884721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:47,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:47,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 12:32:47,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515129611] [2022-11-16 12:32:47,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:47,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:32:47,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:32:47,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=180, Unknown=1, NotChecked=0, Total=240 [2022-11-16 12:32:47,314 INFO L87 Difference]: Start difference. First operand 1792 states and 6055 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 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 12:32:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:54,959 INFO L93 Difference]: Finished difference Result 2948 states and 9819 transitions. [2022-11-16 12:32:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:32:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:32:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:54,968 INFO L225 Difference]: With dead ends: 2948 [2022-11-16 12:32:54,969 INFO L226 Difference]: Without dead ends: 2948 [2022-11-16 12:32:54,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=70, Invalid=234, Unknown=2, NotChecked=0, Total=306 [2022-11-16 12:32:54,969 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 135 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:54,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 0 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 334 Invalid, 0 Unknown, 286 Unchecked, 2.5s Time] [2022-11-16 12:32:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-11-16 12:32:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 1777. [2022-11-16 12:32:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1706 states have (on average 3.406799531066823) internal successors, (5812), 1776 states have internal predecessors, (5812), 0 states have call successors, (0), 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 12:32:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 5812 transitions. [2022-11-16 12:32:55,013 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 5812 transitions. Word has length 17 [2022-11-16 12:32:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:55,014 INFO L495 AbstractCegarLoop]: Abstraction has 1777 states and 5812 transitions. [2022-11-16 12:32:55,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 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 12:32:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 5812 transitions. [2022-11-16 12:32:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:32:55,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:55,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:55,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:55,222 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:32:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -783850889, now seen corresponding path program 1 times [2022-11-16 12:32:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045586796] [2022-11-16 12:32:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:55,223 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 12:32:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:55,224 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:32:55,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (41)] Waiting until timeout for monitored process [2022-11-16 12:32:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:55,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:32:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:55,805 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-16 12:32:55,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 12:32:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:56,002 INFO L321 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2022-11-16 12:32:56,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:32:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:56,221 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:32:56,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-16 12:32:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:57,411 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 12:32:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 55 [2022-11-16 12:32:57,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:57,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:57,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:57,773 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-16 12:32:57,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2022-11-16 12:33:02,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:02,541 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-16 12:33:02,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:33:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:33:05,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:33:05,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:05,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045586796] [2022-11-16 12:33:05,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045586796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:05,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:05,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:33:05,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682010518] [2022-11-16 12:33:05,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:05,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:33:05,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:33:05,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:33:05,336 INFO L87 Difference]: Start difference. First operand 1777 states and 5812 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:33:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:05,676 INFO L93 Difference]: Finished difference Result 1775 states and 5805 transitions. [2022-11-16 12:33:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:33:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:33:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:05,681 INFO L225 Difference]: With dead ends: 1775 [2022-11-16 12:33:05,682 INFO L226 Difference]: Without dead ends: 1775 [2022-11-16 12:33:05,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:33:05,682 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:05,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-11-16 12:33:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-11-16 12:33:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1775. [2022-11-16 12:33:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1704 states have (on average 3.4066901408450705) internal successors, (5805), 1774 states have internal predecessors, (5805), 0 states have call successors, (0), 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 12:33:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 5805 transitions. [2022-11-16 12:33:05,715 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 5805 transitions. Word has length 17 [2022-11-16 12:33:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:05,715 INFO L495 AbstractCegarLoop]: Abstraction has 1775 states and 5805 transitions. [2022-11-16 12:33:05,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:33:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 5805 transitions. [2022-11-16 12:33:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:33:05,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:05,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:05,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (41)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:05,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:33:05,917 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:33:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash -783850888, now seen corresponding path program 1 times [2022-11-16 12:33:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:05,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730511096] [2022-11-16 12:33:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:05,918 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 12:33:05,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:05,919 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:33:05,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (42)] Waiting until timeout for monitored process [2022-11-16 12:33:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:33:06,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:06,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:06,632 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 12:33:06,632 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 15 treesize of output 38 [2022-11-16 12:33:06,658 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 322 treesize of output 314 [2022-11-16 12:33:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:06,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:33:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:06,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:33:06,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:06,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:33:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:06,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:33:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:33:06,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:33:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:33:07,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:33:07,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730511096] [2022-11-16 12:33:07,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730511096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:07,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:07,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:33:07,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601513302] [2022-11-16 12:33:07,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:07,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:33:07,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:33:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:07,114 INFO L87 Difference]: Start difference. First operand 1775 states and 5805 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:33:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:07,763 INFO L93 Difference]: Finished difference Result 1693 states and 5541 transitions. [2022-11-16 12:33:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:33:07,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:33:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:07,770 INFO L225 Difference]: With dead ends: 1693 [2022-11-16 12:33:07,770 INFO L226 Difference]: Without dead ends: 1693 [2022-11-16 12:33:07,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:07,771 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:07,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-11-16 12:33:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2022-11-16 12:33:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1693. [2022-11-16 12:33:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1692 states have internal predecessors, (5541), 0 states have call successors, (0), 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 12:33:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5541 transitions. [2022-11-16 12:33:07,806 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5541 transitions. Word has length 17 [2022-11-16 12:33:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:07,807 INFO L495 AbstractCegarLoop]: Abstraction has 1693 states and 5541 transitions. [2022-11-16 12:33:07,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:33:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5541 transitions. [2022-11-16 12:33:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:33:07,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:07,808 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:07,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (42)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:08,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:33:08,019 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:33:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:08,019 INFO L85 PathProgramCache]: Analyzing trace with hash -125877788, now seen corresponding path program 1 times [2022-11-16 12:33:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:08,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062121537] [2022-11-16 12:33:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:08,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:08,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:08,021 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:33:08,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (43)] Waiting until timeout for monitored process [2022-11-16 12:33:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:33:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:08,339 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:33:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:33:09,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:33:14,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:14,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062121537] [2022-11-16 12:33:14,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062121537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:14,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-16 12:33:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261573978] [2022-11-16 12:33:14,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:33:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:33:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:33:14,725 INFO L87 Difference]: Start difference. First operand 1693 states and 5541 transitions. Second operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:25,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:27,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:29,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:31,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:33,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:35,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:37,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:39,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:41,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:43,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:45,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:47,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:50,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:52,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:54,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:56,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:33:58,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:00,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:02,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:04,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:06,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:08,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:10,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:12,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:34:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:38,298 INFO L93 Difference]: Finished difference Result 1719 states and 5591 transitions. [2022-11-16 12:34:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:34:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:34:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:38,306 INFO L225 Difference]: With dead ends: 1719 [2022-11-16 12:34:38,306 INFO L226 Difference]: Without dead ends: 1719 [2022-11-16 12:34:38,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:34:38,307 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 686 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:38,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 1856 Invalid, 23 Unknown, 0 Unchecked, 60.0s Time] [2022-11-16 12:34:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-16 12:34:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1707. [2022-11-16 12:34:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1644 states have (on average 3.3874695863746958) internal successors, (5569), 1706 states have internal predecessors, (5569), 0 states have call successors, (0), 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 12:34:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 5569 transitions. [2022-11-16 12:34:38,337 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 5569 transitions. Word has length 18 [2022-11-16 12:34:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:38,337 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 5569 transitions. [2022-11-16 12:34:38,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 5569 transitions. [2022-11-16 12:34:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:34:38,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:38,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:38,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (43)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:38,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:38,538 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:34:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1457739011, now seen corresponding path program 1 times [2022-11-16 12:34:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705742812] [2022-11-16 12:34:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:38,539 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 12:34:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:38,540 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:38,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (44)] Waiting until timeout for monitored process [2022-11-16 12:34:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:38,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:34:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:39,101 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:34:39,101 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-16 12:34:39,410 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-16 12:34:39,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-16 12:34:39,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:39,787 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:34:39,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 62 [2022-11-16 12:34:39,960 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:39,961 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:34:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:40,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2022-11-16 12:34:40,205 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:40,206 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 1 case distinctions, treesize of input 24 treesize of output 34 [2022-11-16 12:34:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:40,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:40,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705742812] [2022-11-16 12:34:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705742812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:40,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:40,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:34:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635774049] [2022-11-16 12:34:40,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:40,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:34:40,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:34:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:34:40,937 INFO L87 Difference]: Start difference. First operand 1707 states and 5569 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 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 12:34:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:41,474 INFO L93 Difference]: Finished difference Result 1706 states and 5566 transitions. [2022-11-16 12:34:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:34:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 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 18 [2022-11-16 12:34:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:41,479 INFO L225 Difference]: With dead ends: 1706 [2022-11-16 12:34:41,479 INFO L226 Difference]: Without dead ends: 1706 [2022-11-16 12:34:41,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:34:41,480 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:41,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-11-16 12:34:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2022-11-16 12:34:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1706. [2022-11-16 12:34:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1643 states have (on average 3.3877054169202676) internal successors, (5566), 1705 states have internal predecessors, (5566), 0 states have call successors, (0), 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 12:34:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5566 transitions. [2022-11-16 12:34:41,510 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5566 transitions. Word has length 18 [2022-11-16 12:34:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:41,510 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 5566 transitions. [2022-11-16 12:34:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 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 12:34:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5566 transitions. [2022-11-16 12:34:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:34:41,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:41,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:41,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (44)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:41,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:41,713 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:34:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1457751504, now seen corresponding path program 1 times [2022-11-16 12:34:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:41,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572032090] [2022-11-16 12:34:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:41,714 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 12:34:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:41,715 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:41,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (45)] Waiting until timeout for monitored process [2022-11-16 12:34:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:42,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:34:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:42,315 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 12:34:42,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 12:34:42,493 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:42,494 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 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 12:34:42,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:42,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:34:42,692 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:42,693 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:34:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:42,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:34:42,941 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:42,942 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:34:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:43,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:43,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:43,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572032090] [2022-11-16 12:34:43,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572032090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:43,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:43,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:34:43,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481935412] [2022-11-16 12:34:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:43,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:34:43,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:34:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:34:43,539 INFO L87 Difference]: Start difference. First operand 1706 states and 5566 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 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 12:34:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:45,052 INFO L93 Difference]: Finished difference Result 2281 states and 7895 transitions. [2022-11-16 12:34:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:34:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 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 18 [2022-11-16 12:34:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:45,059 INFO L225 Difference]: With dead ends: 2281 [2022-11-16 12:34:45,059 INFO L226 Difference]: Without dead ends: 2281 [2022-11-16 12:34:45,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:34:45,059 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:45,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 186 Invalid, 0 Unknown, 357 Unchecked, 1.2s Time] [2022-11-16 12:34:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-11-16 12:34:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1708. [2022-11-16 12:34:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1645 states have (on average 3.3872340425531915) internal successors, (5572), 1707 states have internal predecessors, (5572), 0 states have call successors, (0), 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 12:34:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5572 transitions. [2022-11-16 12:34:45,092 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5572 transitions. Word has length 18 [2022-11-16 12:34:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:45,093 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 5572 transitions. [2022-11-16 12:34:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 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 12:34:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5572 transitions. [2022-11-16 12:34:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:34:45,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:45,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:45,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:45,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:45,307 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:34:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1457756762, now seen corresponding path program 1 times [2022-11-16 12:34:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517720724] [2022-11-16 12:34:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:45,308 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 12:34:45,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:45,309 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:45,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (46)] Waiting until timeout for monitored process [2022-11-16 12:34:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:45,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:34:45,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:45,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:45,928 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-16 12:34:45,929 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 15 treesize of output 37 [2022-11-16 12:34:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:45,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:34:46,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:46,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:46,154 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:34:46,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-16 12:34:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:46,400 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:34:46,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-16 12:34:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:46,656 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:46,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:34:46,841 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:34:46,842 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:34:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:48,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:48,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517720724] [2022-11-16 12:34:48,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517720724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:48,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:48,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:34:48,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701442769] [2022-11-16 12:34:48,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:48,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:34:48,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:34:48,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:34:48,176 INFO L87 Difference]: Start difference. First operand 1708 states and 5572 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 12:34:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:48,724 INFO L93 Difference]: Finished difference Result 1712 states and 5583 transitions. [2022-11-16 12:34:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:34:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 18 [2022-11-16 12:34:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:48,730 INFO L225 Difference]: With dead ends: 1712 [2022-11-16 12:34:48,730 INFO L226 Difference]: Without dead ends: 1712 [2022-11-16 12:34:48,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:34:48,731 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:48,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-11-16 12:34:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-11-16 12:34:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1712. [2022-11-16 12:34:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1649 states have (on average 3.3856882959369314) internal successors, (5583), 1711 states have internal predecessors, (5583), 0 states have call successors, (0), 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 12:34:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 5583 transitions. [2022-11-16 12:34:48,772 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 5583 transitions. Word has length 18 [2022-11-16 12:34:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:48,772 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 5583 transitions. [2022-11-16 12:34:48,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 12:34:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 5583 transitions. [2022-11-16 12:34:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:34:48,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:48,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:48,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:48,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:48,989 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:34:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1470441962, now seen corresponding path program 2 times [2022-11-16 12:34:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:48,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232097113] [2022-11-16 12:34:48,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:48,990 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 12:34:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:48,990 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:48,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (47)] Waiting until timeout for monitored process [2022-11-16 12:34:49,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:34:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:34:49,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:49,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:49,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:49,418 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-16 12:34:49,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 12:34:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:49,618 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-16 12:34:49,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-16 12:34:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:50,101 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-16 12:34:50,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-16 12:34:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:50,510 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-16 12:34:50,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-16 12:34:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:50,933 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-16 12:34:50,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-16 12:34:51,592 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:34:51,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:34:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:52,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:52,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:52,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232097113] [2022-11-16 12:34:52,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232097113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:52,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:52,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:34:52,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870736036] [2022-11-16 12:34:52,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:52,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:34:52,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:52,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:34:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:34:52,059 INFO L87 Difference]: Start difference. First operand 1712 states and 5583 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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 12:34:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:52,335 INFO L93 Difference]: Finished difference Result 1710 states and 5576 transitions. [2022-11-16 12:34:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:34:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2022-11-16 12:34:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:52,340 INFO L225 Difference]: With dead ends: 1710 [2022-11-16 12:34:52,340 INFO L226 Difference]: Without dead ends: 1710 [2022-11-16 12:34:52,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:34:52,340 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:52,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-16 12:34:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-11-16 12:34:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1706. [2022-11-16 12:34:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1643 states have (on average 3.3870967741935485) internal successors, (5565), 1705 states have internal predecessors, (5565), 0 states have call successors, (0), 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 12:34:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5565 transitions. [2022-11-16 12:34:52,368 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5565 transitions. Word has length 18 [2022-11-16 12:34:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:52,368 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 5565 transitions. [2022-11-16 12:34:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 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 12:34:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5565 transitions. [2022-11-16 12:34:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:34:52,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:52,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:52,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (47)] Ended with exit code 0 [2022-11-16 12:34:52,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:52,569 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:34:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1470418278, now seen corresponding path program 1 times [2022-11-16 12:34:52,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:52,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272627878] [2022-11-16 12:34:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:52,570 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 12:34:52,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:52,571 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:52,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (48)] Waiting until timeout for monitored process [2022-11-16 12:34:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:34:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:53,129 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:34:53,129 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 33 treesize of output 44 [2022-11-16 12:34:53,199 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:34:53,200 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 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 12:34:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:53,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:34:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:53,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:34:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:53,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:53,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:34:53,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 43 [2022-11-16 12:34:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:34:53,683 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 12:34:53,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2022-11-16 12:34:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:54,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:34:54,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:54,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272627878] [2022-11-16 12:34:54,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272627878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:54,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:54,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:34:54,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120699726] [2022-11-16 12:34:54,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:54,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:34:54,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:34:54,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:34:54,077 INFO L87 Difference]: Start difference. First operand 1706 states and 5565 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 12:34:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:54,690 INFO L93 Difference]: Finished difference Result 1705 states and 5561 transitions. [2022-11-16 12:34:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:34:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 18 [2022-11-16 12:34:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:54,695 INFO L225 Difference]: With dead ends: 1705 [2022-11-16 12:34:54,695 INFO L226 Difference]: Without dead ends: 1705 [2022-11-16 12:34:54,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:34:54,695 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:54,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2022-11-16 12:34:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-11-16 12:34:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2022-11-16 12:34:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1642 states have (on average 3.386723507917174) internal successors, (5561), 1704 states have internal predecessors, (5561), 0 states have call successors, (0), 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 12:34:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5561 transitions. [2022-11-16 12:34:54,722 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5561 transitions. Word has length 18 [2022-11-16 12:34:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:54,722 INFO L495 AbstractCegarLoop]: Abstraction has 1705 states and 5561 transitions. [2022-11-16 12:34:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 12:34:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5561 transitions. [2022-11-16 12:34:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:34:54,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:54,723 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:54,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:54,924 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:34:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -688127009, now seen corresponding path program 2 times [2022-11-16 12:34:54,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:54,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664602977] [2022-11-16 12:34:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:54,925 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 12:34:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:54,926 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:34:54,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (49)] Waiting until timeout for monitored process [2022-11-16 12:34:55,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:34:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:34:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:55,356 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:34:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:34:55,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:34:59,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664602977] [2022-11-16 12:34:59,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664602977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:59,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:59,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 26 [2022-11-16 12:34:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843187258] [2022-11-16 12:34:59,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:59,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:34:59,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:34:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:34:59,056 INFO L87 Difference]: Start difference. First operand 1705 states and 5561 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:11,699 INFO L93 Difference]: Finished difference Result 5040 states and 16535 transitions. [2022-11-16 12:35:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:35:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:35:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:11,713 INFO L225 Difference]: With dead ends: 5040 [2022-11-16 12:35:11,713 INFO L226 Difference]: Without dead ends: 5040 [2022-11-16 12:35:11,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:35:11,714 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 187 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:11,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 0 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-16 12:35:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2022-11-16 12:35:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 1805. [2022-11-16 12:35:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1742 states have (on average 3.3019517795637197) internal successors, (5752), 1804 states have internal predecessors, (5752), 0 states have call successors, (0), 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 12:35:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 5752 transitions. [2022-11-16 12:35:11,792 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 5752 transitions. Word has length 18 [2022-11-16 12:35:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:11,792 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 5752 transitions. [2022-11-16 12:35:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 5752 transitions. [2022-11-16 12:35:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:11,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:11,794 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:11,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (49)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:12,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:12,009 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash 998452998, now seen corresponding path program 2 times [2022-11-16 12:35:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:12,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281301002] [2022-11-16 12:35:12,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:35:12,010 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 12:35:12,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:12,011 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:12,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (50)] Waiting until timeout for monitored process [2022-11-16 12:35:12,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:35:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:12,410 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:35:12,419 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 12:35:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:12,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:35:12,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:35:12,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:35:12,717 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:35:12,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:35:12,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:35:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:12,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:35:12,801 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:35:12,801 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 13 treesize of output 13 [2022-11-16 12:35:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:35:12,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:12,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:12,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281301002] [2022-11-16 12:35:12,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281301002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:12,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:12,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:35:12,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619327940] [2022-11-16 12:35:12,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:12,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:35:12,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:35:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:35:12,949 INFO L87 Difference]: Start difference. First operand 1805 states and 5752 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:35:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:13,767 INFO L93 Difference]: Finished difference Result 1445 states and 4679 transitions. [2022-11-16 12:35:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:35:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:13,772 INFO L225 Difference]: With dead ends: 1445 [2022-11-16 12:35:13,772 INFO L226 Difference]: Without dead ends: 1445 [2022-11-16 12:35:13,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:35:13,772 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:13,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:35:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-11-16 12:35:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1316. [2022-11-16 12:35:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1276 states have (on average 3.2899686520376177) internal successors, (4198), 1315 states have internal predecessors, (4198), 0 states have call successors, (0), 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 12:35:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4198 transitions. [2022-11-16 12:35:13,796 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4198 transitions. Word has length 19 [2022-11-16 12:35:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:13,796 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 4198 transitions. [2022-11-16 12:35:13,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:35:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4198 transitions. [2022-11-16 12:35:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:13,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:13,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:13,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (50)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:13,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:13,997 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2054732921, now seen corresponding path program 1 times [2022-11-16 12:35:13,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271425296] [2022-11-16 12:35:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:13,998 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 12:35:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:13,999 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:14,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (51)] Waiting until timeout for monitored process [2022-11-16 12:35:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:35:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:14,589 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:14,589 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-16 12:35:14,889 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-16 12:35:14,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-16 12:35:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:15,267 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:35:15,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 60 [2022-11-16 12:35:15,428 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:15,428 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:15,552 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:15,552 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 1 case distinctions, treesize of input 24 treesize of output 34 [2022-11-16 12:35:15,686 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:15,687 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 1 case distinctions, treesize of input 27 treesize of output 37 [2022-11-16 12:35:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:16,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:16,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:16,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271425296] [2022-11-16 12:35:16,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271425296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:16,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:16,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:35:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497214048] [2022-11-16 12:35:16,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:16,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:35:16,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:35:16,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:35:16,384 INFO L87 Difference]: Start difference. First operand 1316 states and 4198 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:16,747 INFO L93 Difference]: Finished difference Result 1315 states and 4195 transitions. [2022-11-16 12:35:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:35:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:16,751 INFO L225 Difference]: With dead ends: 1315 [2022-11-16 12:35:16,751 INFO L226 Difference]: Without dead ends: 1315 [2022-11-16 12:35:16,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:35:16,751 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:16,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 123 Unchecked, 0.4s Time] [2022-11-16 12:35:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-16 12:35:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1314. [2022-11-16 12:35:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1274 states have (on average 3.290423861852433) internal successors, (4192), 1313 states have internal predecessors, (4192), 0 states have call successors, (0), 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 12:35:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4192 transitions. [2022-11-16 12:35:16,772 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4192 transitions. Word has length 19 [2022-11-16 12:35:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:16,772 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 4192 transitions. [2022-11-16 12:35:16,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4192 transitions. [2022-11-16 12:35:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:16,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:16,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:16,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (51)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:16,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:16,974 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:16,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:16,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2054335904, now seen corresponding path program 1 times [2022-11-16 12:35:16,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:16,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826752611] [2022-11-16 12:35:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:16,975 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 12:35:16,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:16,976 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:16,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (52)] Waiting until timeout for monitored process [2022-11-16 12:35:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:17,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:35:17,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:17,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:17,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:17,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826752611] [2022-11-16 12:35:17,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826752611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:17,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:17,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:35:17,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071640980] [2022-11-16 12:35:17,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:35:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:35:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:35:17,284 INFO L87 Difference]: Start difference. First operand 1314 states and 4192 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:18,030 INFO L93 Difference]: Finished difference Result 1451 states and 4661 transitions. [2022-11-16 12:35:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:35:18,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:18,034 INFO L225 Difference]: With dead ends: 1451 [2022-11-16 12:35:18,035 INFO L226 Difference]: Without dead ends: 1451 [2022-11-16 12:35:18,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 12:35:18,035 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:18,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:35:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-16 12:35:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1451. [2022-11-16 12:35:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1411 states have (on average 3.3033309709425938) internal successors, (4661), 1450 states have internal predecessors, (4661), 0 states have call successors, (0), 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 12:35:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4661 transitions. [2022-11-16 12:35:18,060 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4661 transitions. Word has length 19 [2022-11-16 12:35:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:18,060 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 4661 transitions. [2022-11-16 12:35:18,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4661 transitions. [2022-11-16 12:35:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:18,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:18,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:18,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (52)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:18,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:18,277 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2054348242, now seen corresponding path program 1 times [2022-11-16 12:35:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678696807] [2022-11-16 12:35:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:18,277 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 12:35:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:18,278 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:18,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (53)] Waiting until timeout for monitored process [2022-11-16 12:35:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:18,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:18,861 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 12:35:18,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 12:35:18,967 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:18,967 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 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 12:35:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:19,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:35:19,143 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:19,144 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:19,397 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:19,397 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:19,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:19,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:19,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678696807] [2022-11-16 12:35:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678696807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:19,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:19,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:35:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268215261] [2022-11-16 12:35:19,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:35:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:35:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:35:19,848 INFO L87 Difference]: Start difference. First operand 1451 states and 4661 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:21,461 INFO L93 Difference]: Finished difference Result 1809 states and 5687 transitions. [2022-11-16 12:35:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:35:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:21,466 INFO L225 Difference]: With dead ends: 1809 [2022-11-16 12:35:21,466 INFO L226 Difference]: Without dead ends: 1809 [2022-11-16 12:35:21,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:35:21,466 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 238 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:21,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 0 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 143 Invalid, 0 Unknown, 173 Unchecked, 1.0s Time] [2022-11-16 12:35:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-11-16 12:35:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1578. [2022-11-16 12:35:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1538 states have (on average 3.2854356306892067) internal successors, (5053), 1577 states have internal predecessors, (5053), 0 states have call successors, (0), 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 12:35:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 5053 transitions. [2022-11-16 12:35:21,496 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 5053 transitions. Word has length 19 [2022-11-16 12:35:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:21,496 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 5053 transitions. [2022-11-16 12:35:21,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 5053 transitions. [2022-11-16 12:35:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:21,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:21,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:21,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (53)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:21,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:21,697 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:21,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2054308078, now seen corresponding path program 1 times [2022-11-16 12:35:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:21,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114392205] [2022-11-16 12:35:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:21,698 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 12:35:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:21,699 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:21,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (54)] Waiting until timeout for monitored process [2022-11-16 12:35:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:22,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:35:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:22,357 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:22,358 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:22,431 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:22,431 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:22,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:22,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:22,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:22,789 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:35:22,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 46 [2022-11-16 12:35:22,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:23,000 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 12:35:23,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 43 [2022-11-16 12:35:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:23,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:23,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114392205] [2022-11-16 12:35:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114392205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:23,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:23,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:35:23,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929310493] [2022-11-16 12:35:23,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:23,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:35:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:23,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:35:23,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:35:23,562 INFO L87 Difference]: Start difference. First operand 1578 states and 5053 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:24,271 INFO L93 Difference]: Finished difference Result 1580 states and 5060 transitions. [2022-11-16 12:35:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:35:24,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:24,276 INFO L225 Difference]: With dead ends: 1580 [2022-11-16 12:35:24,276 INFO L226 Difference]: Without dead ends: 1580 [2022-11-16 12:35:24,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:35:24,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:24,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-11-16 12:35:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-11-16 12:35:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2022-11-16 12:35:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1540 states have (on average 3.2857142857142856) internal successors, (5060), 1579 states have internal predecessors, (5060), 0 states have call successors, (0), 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 12:35:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5060 transitions. [2022-11-16 12:35:24,302 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5060 transitions. Word has length 19 [2022-11-16 12:35:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:24,303 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 5060 transitions. [2022-11-16 12:35:24,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5060 transitions. [2022-11-16 12:35:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:24,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:24,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:24,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (54)] Ended with exit code 0 [2022-11-16 12:35:24,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:24,507 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2054179738, now seen corresponding path program 2 times [2022-11-16 12:35:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:24,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789088910] [2022-11-16 12:35:24,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:35:24,508 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 12:35:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:24,509 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:24,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (55)] Waiting until timeout for monitored process [2022-11-16 12:35:24,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:35:24,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:35:24,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:24,990 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:24,990 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:25,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:25,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:35:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:25,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:35:25,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:25,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:35:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:25,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:35:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:25,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 12:35:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:25,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:25,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789088910] [2022-11-16 12:35:25,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789088910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:25,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:25,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:35:25,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565374055] [2022-11-16 12:35:25,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:25,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:35:25,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:35:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:35:25,718 INFO L87 Difference]: Start difference. First operand 1580 states and 5060 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:26,626 INFO L93 Difference]: Finished difference Result 1584 states and 5072 transitions. [2022-11-16 12:35:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:35:26,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:26,630 INFO L225 Difference]: With dead ends: 1584 [2022-11-16 12:35:26,630 INFO L226 Difference]: Without dead ends: 1584 [2022-11-16 12:35:26,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:26,631 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:26,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-11-16 12:35:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2022-11-16 12:35:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1582. [2022-11-16 12:35:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1542 states have (on average 3.2846952010376134) internal successors, (5065), 1581 states have internal predecessors, (5065), 0 states have call successors, (0), 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 12:35:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5065 transitions. [2022-11-16 12:35:26,658 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5065 transitions. Word has length 19 [2022-11-16 12:35:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:26,659 INFO L495 AbstractCegarLoop]: Abstraction has 1582 states and 5065 transitions. [2022-11-16 12:35:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5065 transitions. [2022-11-16 12:35:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:26,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:26,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:26,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:26,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:26,860 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2054188573, now seen corresponding path program 1 times [2022-11-16 12:35:26,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:26,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295923645] [2022-11-16 12:35:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:26,861 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 12:35:26,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:26,862 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:26,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (56)] Waiting until timeout for monitored process [2022-11-16 12:35:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:35:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:27,515 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:27,516 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:27,591 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:27,592 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:27,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:27,837 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:35:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 46 [2022-11-16 12:35:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:28,040 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:28,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 43 [2022-11-16 12:35:28,230 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:28,230 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:28,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:28,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:28,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295923645] [2022-11-16 12:35:28,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295923645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:28,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:28,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:35:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689965990] [2022-11-16 12:35:28,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:28,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:35:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:35:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:28,863 INFO L87 Difference]: Start difference. First operand 1582 states and 5065 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:29,375 INFO L93 Difference]: Finished difference Result 1583 states and 5068 transitions. [2022-11-16 12:35:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:35:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:29,380 INFO L225 Difference]: With dead ends: 1583 [2022-11-16 12:35:29,380 INFO L226 Difference]: Without dead ends: 1583 [2022-11-16 12:35:29,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:29,380 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:29,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-11-16 12:35:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-11-16 12:35:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1583. [2022-11-16 12:35:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1543 states have (on average 3.2845106934543096) internal successors, (5068), 1582 states have internal predecessors, (5068), 0 states have call successors, (0), 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 12:35:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5068 transitions. [2022-11-16 12:35:29,406 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5068 transitions. Word has length 19 [2022-11-16 12:35:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:29,407 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 5068 transitions. [2022-11-16 12:35:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5068 transitions. [2022-11-16 12:35:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:29,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:29,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:29,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (56)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:29,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:29,611 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:29,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2053760308, now seen corresponding path program 3 times [2022-11-16 12:35:29,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:29,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242208180] [2022-11-16 12:35:29,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:29,612 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 12:35:29,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:29,613 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:29,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (57)] Waiting until timeout for monitored process [2022-11-16 12:35:30,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:35:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:35:30,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:30,124 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:30,124 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:30,205 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:30,205 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:30,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:30,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:30,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:30,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:30,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:30,564 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:30,564 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:30,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:30,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242208180] [2022-11-16 12:35:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242208180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:30,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:30,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:35:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639781752] [2022-11-16 12:35:30,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:30,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:35:30,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:30,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:35:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:35:30,938 INFO L87 Difference]: Start difference. First operand 1583 states and 5068 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:31,805 INFO L93 Difference]: Finished difference Result 1585 states and 5075 transitions. [2022-11-16 12:35:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:35:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:31,810 INFO L225 Difference]: With dead ends: 1585 [2022-11-16 12:35:31,810 INFO L226 Difference]: Without dead ends: 1585 [2022-11-16 12:35:31,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:35:31,810 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:31,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 141 Unchecked, 0.7s Time] [2022-11-16 12:35:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-11-16 12:35:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1583. [2022-11-16 12:35:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1543 states have (on average 3.2845106934543096) internal successors, (5068), 1582 states have internal predecessors, (5068), 0 states have call successors, (0), 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 12:35:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5068 transitions. [2022-11-16 12:35:31,836 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5068 transitions. Word has length 19 [2022-11-16 12:35:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:31,837 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 5068 transitions. [2022-11-16 12:35:31,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5068 transitions. [2022-11-16 12:35:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:31,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:31,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:31,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (57)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:32,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:32,051 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:32,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:32,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1660938538, now seen corresponding path program 4 times [2022-11-16 12:35:32,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:32,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180487583] [2022-11-16 12:35:32,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:35:32,052 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 12:35:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:32,053 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:32,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (58)] Waiting until timeout for monitored process [2022-11-16 12:35:32,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:35:32,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:32,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:32,733 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:32,733 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:32,821 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:32,821 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:32,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:33,099 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:35:33,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 46 [2022-11-16 12:35:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:33,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:33,317 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:33,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 43 [2022-11-16 12:35:33,490 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:33,490 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:34,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:34,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180487583] [2022-11-16 12:35:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180487583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:34,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:35:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956334927] [2022-11-16 12:35:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:35:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:35:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:34,072 INFO L87 Difference]: Start difference. First operand 1583 states and 5068 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:34,624 INFO L93 Difference]: Finished difference Result 1587 states and 5083 transitions. [2022-11-16 12:35:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:35:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:34,629 INFO L225 Difference]: With dead ends: 1587 [2022-11-16 12:35:34,629 INFO L226 Difference]: Without dead ends: 1587 [2022-11-16 12:35:34,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:34,629 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:34,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2022-11-16 12:35:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-11-16 12:35:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1584. [2022-11-16 12:35:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1544 states have (on average 3.2843264248704664) internal successors, (5071), 1583 states have internal predecessors, (5071), 0 states have call successors, (0), 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 12:35:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5071 transitions. [2022-11-16 12:35:34,657 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5071 transitions. Word has length 19 [2022-11-16 12:35:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:34,657 INFO L495 AbstractCegarLoop]: Abstraction has 1584 states and 5071 transitions. [2022-11-16 12:35:34,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5071 transitions. [2022-11-16 12:35:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:34,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:34,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:34,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (58)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:34,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:34,858 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:34,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1660947373, now seen corresponding path program 2 times [2022-11-16 12:35:34,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:34,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652554133] [2022-11-16 12:35:34,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:35:34,859 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 12:35:34,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:34,860 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:34,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (59)] Waiting until timeout for monitored process [2022-11-16 12:35:35,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:35:35,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:35:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:35,391 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:35,391 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:35,474 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:35,474 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:35,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:35,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:35,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:35,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:35,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:35,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:35,844 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:35,844 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:36,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:36,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652554133] [2022-11-16 12:35:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652554133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:36,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:35:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554948295] [2022-11-16 12:35:36,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:36,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:35:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:35:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:35:36,248 INFO L87 Difference]: Start difference. First operand 1584 states and 5071 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:37,021 INFO L93 Difference]: Finished difference Result 1592 states and 5096 transitions. [2022-11-16 12:35:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:35:37,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:37,025 INFO L225 Difference]: With dead ends: 1592 [2022-11-16 12:35:37,025 INFO L226 Difference]: Without dead ends: 1592 [2022-11-16 12:35:37,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:35:37,026 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:37,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 135 Unchecked, 0.6s Time] [2022-11-16 12:35:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-11-16 12:35:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2022-11-16 12:35:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1552 states have (on average 3.283505154639175) internal successors, (5096), 1591 states have internal predecessors, (5096), 0 states have call successors, (0), 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 12:35:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5096 transitions. [2022-11-16 12:35:37,052 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5096 transitions. Word has length 19 [2022-11-16 12:35:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:37,052 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 5096 transitions. [2022-11-16 12:35:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5096 transitions. [2022-11-16 12:35:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:37,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:37,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:37,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (59)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:37,253 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1660519108, now seen corresponding path program 5 times [2022-11-16 12:35:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:37,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272361655] [2022-11-16 12:35:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:35:37,254 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 12:35:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:37,255 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:37,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (60)] Waiting until timeout for monitored process [2022-11-16 12:35:37,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:35:37,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:35:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:38,070 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:38,070 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:38,161 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:38,161 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:38,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:38,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:38,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:38,602 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:38,603 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:35:39,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:39,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:39,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272361655] [2022-11-16 12:35:39,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272361655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:39,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:39,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:35:39,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195256919] [2022-11-16 12:35:39,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:35:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:35:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:39,190 INFO L87 Difference]: Start difference. First operand 1592 states and 5096 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:39,682 INFO L93 Difference]: Finished difference Result 1594 states and 5103 transitions. [2022-11-16 12:35:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:35:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:39,686 INFO L225 Difference]: With dead ends: 1594 [2022-11-16 12:35:39,686 INFO L226 Difference]: Without dead ends: 1594 [2022-11-16 12:35:39,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:39,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:39,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-11-16 12:35:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-11-16 12:35:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1591. [2022-11-16 12:35:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1551 states have (on average 3.2836879432624113) internal successors, (5093), 1590 states have internal predecessors, (5093), 0 states have call successors, (0), 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 12:35:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5093 transitions. [2022-11-16 12:35:39,713 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5093 transitions. Word has length 19 [2022-11-16 12:35:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:39,713 INFO L495 AbstractCegarLoop]: Abstraction has 1591 states and 5093 transitions. [2022-11-16 12:35:39,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5093 transitions. [2022-11-16 12:35:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:39,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:39,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:39,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (60)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:39,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:39,915 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1661803438, now seen corresponding path program 6 times [2022-11-16 12:35:39,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529949436] [2022-11-16 12:35:39,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:35:39,916 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 12:35:39,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:39,917 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:39,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (61)] Waiting until timeout for monitored process [2022-11-16 12:35:40,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 12:35:40,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:40,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:40,461 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:40,462 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:40,551 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:40,551 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:40,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:40,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:40,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:40,978 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:40,978 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:41,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:41,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:41,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529949436] [2022-11-16 12:35:41,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529949436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:41,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:35:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546094476] [2022-11-16 12:35:41,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:41,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:35:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:35:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:35:41,400 INFO L87 Difference]: Start difference. First operand 1591 states and 5093 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:42,233 INFO L93 Difference]: Finished difference Result 1593 states and 5099 transitions. [2022-11-16 12:35:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:35:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:42,238 INFO L225 Difference]: With dead ends: 1593 [2022-11-16 12:35:42,238 INFO L226 Difference]: Without dead ends: 1593 [2022-11-16 12:35:42,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:35:42,238 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:42,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 89 Unchecked, 0.7s Time] [2022-11-16 12:35:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-11-16 12:35:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1589. [2022-11-16 12:35:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1549 states have (on average 3.2827630729502904) internal successors, (5085), 1588 states have internal predecessors, (5085), 0 states have call successors, (0), 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 12:35:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5085 transitions. [2022-11-16 12:35:42,266 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5085 transitions. Word has length 19 [2022-11-16 12:35:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:42,266 INFO L495 AbstractCegarLoop]: Abstraction has 1589 states and 5085 transitions. [2022-11-16 12:35:42,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5085 transitions. [2022-11-16 12:35:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:42,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:42,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:42,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (61)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:42,469 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1661812273, now seen corresponding path program 3 times [2022-11-16 12:35:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164186044] [2022-11-16 12:35:42,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:42,470 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 12:35:42,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:42,472 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:42,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (62)] Waiting until timeout for monitored process [2022-11-16 12:35:42,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:35:42,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:35:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:43,012 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:43,013 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:43,102 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:43,103 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:43,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:43,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:43,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:43,488 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:43,488 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:43,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:43,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:43,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164186044] [2022-11-16 12:35:43,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164186044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:43,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:43,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:35:43,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18808027] [2022-11-16 12:35:43,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:43,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:35:43,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:43,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:35:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:35:43,947 INFO L87 Difference]: Start difference. First operand 1589 states and 5085 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:44,470 INFO L93 Difference]: Finished difference Result 1590 states and 5088 transitions. [2022-11-16 12:35:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:35:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:44,474 INFO L225 Difference]: With dead ends: 1590 [2022-11-16 12:35:44,474 INFO L226 Difference]: Without dead ends: 1590 [2022-11-16 12:35:44,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:35:44,475 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:44,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-16 12:35:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2022-11-16 12:35:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1588. [2022-11-16 12:35:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1548 states have (on average 3.2829457364341086) internal successors, (5082), 1587 states have internal predecessors, (5082), 0 states have call successors, (0), 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 12:35:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5082 transitions. [2022-11-16 12:35:44,502 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5082 transitions. Word has length 19 [2022-11-16 12:35:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:44,502 INFO L495 AbstractCegarLoop]: Abstraction has 1588 states and 5082 transitions. [2022-11-16 12:35:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5082 transitions. [2022-11-16 12:35:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:44,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:44,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:44,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (62)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:44,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:44,715 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1661685793, now seen corresponding path program 4 times [2022-11-16 12:35:44,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:44,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56730782] [2022-11-16 12:35:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:35:44,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:44,717 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:44,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (63)] Waiting until timeout for monitored process [2022-11-16 12:35:45,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:35:45,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:45,389 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 12:35:45,389 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 12:35:45,473 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:45,473 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:45,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:45,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:45,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:45,738 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:35:45,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 46 [2022-11-16 12:35:45,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:45,980 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:45,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 43 [2022-11-16 12:35:46,179 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:46,180 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:46,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:46,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56730782] [2022-11-16 12:35:46,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56730782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:46,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:46,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:35:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702903665] [2022-11-16 12:35:46,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:46,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:35:46,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:35:46,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:46,884 INFO L87 Difference]: Start difference. First operand 1588 states and 5082 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:47,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:47,435 INFO L93 Difference]: Finished difference Result 1587 states and 5079 transitions. [2022-11-16 12:35:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:35:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:47,439 INFO L225 Difference]: With dead ends: 1587 [2022-11-16 12:35:47,439 INFO L226 Difference]: Without dead ends: 1587 [2022-11-16 12:35:47,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:47,440 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:47,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-11-16 12:35:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-11-16 12:35:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1586. [2022-11-16 12:35:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1546 states have (on average 3.2833117723156535) internal successors, (5076), 1585 states have internal predecessors, (5076), 0 states have call successors, (0), 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 12:35:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5076 transitions. [2022-11-16 12:35:47,467 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5076 transitions. Word has length 19 [2022-11-16 12:35:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:47,467 INFO L495 AbstractCegarLoop]: Abstraction has 1586 states and 5076 transitions. [2022-11-16 12:35:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5076 transitions. [2022-11-16 12:35:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:47,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:47,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:47,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (63)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:47,668 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1661677623, now seen corresponding path program 1 times [2022-11-16 12:35:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:47,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191929144] [2022-11-16 12:35:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:47,669 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 12:35:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:47,670 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:47,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (64)] Waiting until timeout for monitored process [2022-11-16 12:35:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:35:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:48,021 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:35:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:48,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:48,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191929144] [2022-11-16 12:35:48,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191929144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:48,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:48,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:35:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320789831] [2022-11-16 12:35:48,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:48,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:35:48,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:35:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:35:48,054 INFO L87 Difference]: Start difference. First operand 1586 states and 5076 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:48,651 INFO L93 Difference]: Finished difference Result 1196 states and 3667 transitions. [2022-11-16 12:35:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:35:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:48,655 INFO L225 Difference]: With dead ends: 1196 [2022-11-16 12:35:48,655 INFO L226 Difference]: Without dead ends: 1196 [2022-11-16 12:35:48,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:35:48,655 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:48,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:35:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-16 12:35:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2022-11-16 12:35:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1173 states have (on average 3.12617220801364) internal successors, (3667), 1195 states have internal predecessors, (3667), 0 states have call successors, (0), 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 12:35:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 3667 transitions. [2022-11-16 12:35:48,672 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 3667 transitions. Word has length 19 [2022-11-16 12:35:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:48,672 INFO L495 AbstractCegarLoop]: Abstraction has 1196 states and 3667 transitions. [2022-11-16 12:35:48,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 3667 transitions. [2022-11-16 12:35:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:48,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:48,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:48,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (64)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:48,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:48,875 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1661677671, now seen corresponding path program 1 times [2022-11-16 12:35:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:48,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141423903] [2022-11-16 12:35:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:48,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:48,877 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:48,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (65)] Waiting until timeout for monitored process [2022-11-16 12:35:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:35:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:49,517 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:35:49,517 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 33 treesize of output 44 [2022-11-16 12:35:49,604 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:49,605 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 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 12:35:49,689 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:49,690 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 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:35:49,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:49,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:35:49,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2022-11-16 12:35:50,001 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:35:50,001 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 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-16 12:35:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:50,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:50,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141423903] [2022-11-16 12:35:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141423903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:50,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:50,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:35:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469554574] [2022-11-16 12:35:50,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:35:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:35:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:35:50,539 INFO L87 Difference]: Start difference. First operand 1196 states and 3667 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:51,093 INFO L93 Difference]: Finished difference Result 1134 states and 3462 transitions. [2022-11-16 12:35:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:35:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:51,097 INFO L225 Difference]: With dead ends: 1134 [2022-11-16 12:35:51,097 INFO L226 Difference]: Without dead ends: 1134 [2022-11-16 12:35:51,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:35:51,097 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 318 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:51,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 7 Unchecked, 0.5s Time] [2022-11-16 12:35:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-16 12:35:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1125. [2022-11-16 12:35:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1106 states have (on average 3.105786618444846) internal successors, (3435), 1124 states have internal predecessors, (3435), 0 states have call successors, (0), 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 12:35:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3435 transitions. [2022-11-16 12:35:51,115 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3435 transitions. Word has length 19 [2022-11-16 12:35:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:51,116 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 3435 transitions. [2022-11-16 12:35:51,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3435 transitions. [2022-11-16 12:35:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:51,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:51,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:51,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (65)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:51,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:51,317 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:51,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1661677622, now seen corresponding path program 1 times [2022-11-16 12:35:51,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:51,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692878518] [2022-11-16 12:35:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:51,318 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 12:35:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:51,324 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:51,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (66)] Waiting until timeout for monitored process [2022-11-16 12:35:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:51,896 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:35:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:35:52,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:35:53,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:53,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692878518] [2022-11-16 12:35:53,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692878518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:53,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:53,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:35:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485690633] [2022-11-16 12:35:53,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:35:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:35:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:35:53,274 INFO L87 Difference]: Start difference. First operand 1125 states and 3435 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 12:35:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:58,885 INFO L93 Difference]: Finished difference Result 2603 states and 8081 transitions. [2022-11-16 12:35:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:35:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:58,894 INFO L225 Difference]: With dead ends: 2603 [2022-11-16 12:35:58,894 INFO L226 Difference]: Without dead ends: 2603 [2022-11-16 12:35:58,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:35:58,894 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 463 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:58,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 0 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-16 12:35:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2022-11-16 12:35:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1572. [2022-11-16 12:35:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1553 states have (on average 3.1828718609143594) internal successors, (4943), 1571 states have internal predecessors, (4943), 0 states have call successors, (0), 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 12:35:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 4943 transitions. [2022-11-16 12:35:58,929 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 4943 transitions. Word has length 19 [2022-11-16 12:35:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:58,929 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 4943 transitions. [2022-11-16 12:35:58,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 12:35:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 4943 transitions. [2022-11-16 12:35:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:35:58,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:58,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:58,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (66)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:59,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:59,131 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:35:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1661378444, now seen corresponding path program 1 times [2022-11-16 12:35:59,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:59,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141904328] [2022-11-16 12:35:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:35:59,131 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 12:35:59,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:59,132 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:35:59,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (67)] Waiting until timeout for monitored process [2022-11-16 12:35:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:35:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:35:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:35:59,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:35:59,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141904328] [2022-11-16 12:35:59,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141904328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:35:59,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:35:59,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:35:59,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759487779] [2022-11-16 12:35:59,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:35:59,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:35:59,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:35:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:35:59,507 INFO L87 Difference]: Start difference. First operand 1572 states and 4943 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:59,952 INFO L93 Difference]: Finished difference Result 1300 states and 3835 transitions. [2022-11-16 12:35:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:35:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:35:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:59,955 INFO L225 Difference]: With dead ends: 1300 [2022-11-16 12:35:59,955 INFO L226 Difference]: Without dead ends: 1300 [2022-11-16 12:35:59,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 12:35:59,955 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:59,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:35:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-16 12:35:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1300. [2022-11-16 12:35:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1285 states have (on average 2.9844357976653697) internal successors, (3835), 1299 states have internal predecessors, (3835), 0 states have call successors, (0), 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 12:35:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3835 transitions. [2022-11-16 12:35:59,977 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3835 transitions. Word has length 19 [2022-11-16 12:35:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:59,977 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 3835 transitions. [2022-11-16 12:35:59,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 12:35:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3835 transitions. [2022-11-16 12:35:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:35:59,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:59,978 INFO L195 NwaCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:59,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (67)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:36:00,183 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:36:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash -579341000, now seen corresponding path program 3 times [2022-11-16 12:36:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554001582] [2022-11-16 12:36:00,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:36:00,184 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 12:36:00,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:00,185 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:36:00,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (68)] Waiting until timeout for monitored process [2022-11-16 12:36:00,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:36:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:00,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:36:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:00,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:36:00,742 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:36:00,879 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 13 treesize of output 9 [2022-11-16 12:36:01,013 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:36:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-16 12:36:01,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 12:36:03,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554001582] [2022-11-16 12:36:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554001582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:03,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:03,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2022-11-16 12:36:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087101236] [2022-11-16 12:36:03,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:36:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:36:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:36:03,414 INFO L87 Difference]: Start difference. First operand 1300 states and 3835 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 12:36:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:06,842 INFO L93 Difference]: Finished difference Result 1369 states and 3967 transitions. [2022-11-16 12:36:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:36:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 20 [2022-11-16 12:36:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:06,846 INFO L225 Difference]: With dead ends: 1369 [2022-11-16 12:36:06,846 INFO L226 Difference]: Without dead ends: 1369 [2022-11-16 12:36:06,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:36:06,847 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:06,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 359 Invalid, 0 Unknown, 59 Unchecked, 1.8s Time] [2022-11-16 12:36:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-11-16 12:36:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1233. [2022-11-16 12:36:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1219 states have (on average 3.0377358490566038) internal successors, (3703), 1232 states have internal predecessors, (3703), 0 states have call successors, (0), 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 12:36:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3703 transitions. [2022-11-16 12:36:06,871 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3703 transitions. Word has length 20 [2022-11-16 12:36:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:06,871 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 3703 transitions. [2022-11-16 12:36:06,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 12:36:06,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3703 transitions. [2022-11-16 12:36:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:36:06,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:06,872 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2022-11-16 12:36:06,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (68)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:07,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:36:07,072 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-16 12:36:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1698737543, now seen corresponding path program 2 times [2022-11-16 12:36:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:07,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350404672] [2022-11-16 12:36:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:36:07,073 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 12:36:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:07,074 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 12:36:07,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea11b118-d82c-4c68-8717-fe4afac12e4b/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 (69)] Waiting until timeout for monitored process [2022-11-16 12:36:07,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:36:07,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:36:07,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:07,453 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:36:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:36:08,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:36:16,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:16,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350404672] [2022-11-16 12:36:16,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350404672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:16,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:16,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-16 12:36:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464031475] [2022-11-16 12:36:16,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:16,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:36:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:36:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:36:16,134 INFO L87 Difference]: Start difference. First operand 1233 states and 3703 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 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 12:36:31,082 WARN L233 SmtUtils]: Spent 12.68s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:36:39,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:41,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:43,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:45,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:47,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:49,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:51,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:53,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:55,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:57,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:59,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:01,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:03,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:05,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:07,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:09,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:22,652 WARN L233 SmtUtils]: Spent 9.80s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:37:31,303 WARN L233 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:37:39,675 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:37:41,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:43,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:45,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:47,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:49,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:51,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:53,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:55,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:57,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:59,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:01,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:03,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:05,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:07,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:09,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:11,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:18,439 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)