./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- 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-6b4ec56 [2022-11-20 11:41:13,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:41:13,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:41:13,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:41:13,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:41:13,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:41:13,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:41:13,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:41:13,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:41:13,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:41:13,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:41:13,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:41:13,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:41:13,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:41:13,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:41:13,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:41:13,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:41:13,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:41:13,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:41:13,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:41:13,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:41:13,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:41:13,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:41:13,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:41:13,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:41:13,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:41:13,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:41:13,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:41:13,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:41:13,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:41:13,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:41:13,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:41:13,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:41:13,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:41:13,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:41:13,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:41:13,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:41:13,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:41:13,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:41:13,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:41:13,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:41:13,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:41:14,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:41:14,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:41:14,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:41:14,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:41:14,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:41:14,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:41:14,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:41:14,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:41:14,037 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:41:14,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:41:14,038 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:41:14,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:41:14,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:41:14,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:41:14,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:41:14,048 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:41:14,049 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:41:14,049 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:41:14,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:41:14,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:41:14,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:41:14,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:41:14,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:41:14,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:41:14,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:41:14,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:41:14,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:41:14,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:41:14,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:41:14,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:41:14,053 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_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-20 11:41:14,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:41:14,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:41:14,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:41:14,399 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:41:14,400 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:41:14,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-20 11:41:17,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:41:17,727 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:41:17,728 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-20 11:41:17,735 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data/3c550b52f/b233fa113729434894b1edc6d0be7a41/FLAGf2fdb8331 [2022-11-20 11:41:18,050 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data/3c550b52f/b233fa113729434894b1edc6d0be7a41 [2022-11-20 11:41:18,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:41:18,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:41:18,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:41:18,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:41:18,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:41:18,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:41:18" (1/1) ... [2022-11-20 11:41:18,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d94637c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:18, skipping insertion in model container [2022-11-20 11:41:18,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:41:18" (1/1) ... [2022-11-20 11:41:18,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:41:18,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:41:18,315 WARN L237 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_f26c725f-0997-40d7-b7e7-2010c6c53f57/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-20 11:41:18,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:41:18,349 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) [2022-11-20 11:41:18,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a7ce9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:18, skipping insertion in model container [2022-11-20 11:41:18,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:41:18,351 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 11:41:18,355 INFO L158 Benchmark]: Toolchain (without parser) took 298.80ms. Allocated memory is still 144.7MB. Free memory was 110.6MB in the beginning and 100.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:41:18,356 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 144.7MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:41:18,356 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.88ms. Allocated memory is still 144.7MB. Free memory was 110.6MB in the beginning and 100.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:41:18,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 144.7MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.88ms. Allocated memory is still 144.7MB. Free memory was 110.6MB in the beginning and 100.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- 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-6b4ec56 [2022-11-20 11:41:20,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:41:20,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:41:20,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:41:20,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:41:20,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:41:20,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:41:20,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:41:20,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:41:20,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:41:20,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:41:20,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:41:20,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:41:20,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:41:20,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:41:20,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:41:20,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:41:20,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:41:20,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:41:20,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:41:20,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:41:20,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:41:20,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:41:20,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:41:20,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:41:20,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:41:20,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:41:20,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:41:20,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:41:20,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:41:20,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:41:20,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:41:20,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:41:20,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:41:20,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:41:20,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:41:20,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:41:20,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:41:20,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:41:20,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:41:20,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:41:20,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 11:41:20,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:41:20,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:41:20,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:41:20,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:41:20,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:41:20,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:41:20,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:41:20,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:41:20,840 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:41:20,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:41:20,842 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:41:20,842 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:41:20,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:41:20,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:41:20,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:41:20,843 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:41:20,843 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:41:20,843 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:41:20,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:41:20,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:41:20,844 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 11:41:20,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 11:41:20,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:41:20,845 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:41:20,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:41:20,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:41:20,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:41:20,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:41:20,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:41:20,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:41:20,846 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 11:41:20,847 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 11:41:20,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 11:41:20,847 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_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-20 11:41:21,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:41:21,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:41:21,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:41:21,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:41:21,288 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:41:21,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-20 11:41:24,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:41:24,543 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:41:24,543 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-20 11:41:24,551 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data/7f7579788/1b5cf90da43f4283a68b95165f4ebc4e/FLAGc9caa4bf5 [2022-11-20 11:41:24,566 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/data/7f7579788/1b5cf90da43f4283a68b95165f4ebc4e [2022-11-20 11:41:24,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:41:24,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:41:24,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:41:24,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:41:24,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:41:24,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:24,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc74b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24, skipping insertion in model container [2022-11-20 11:41:24,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:24,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:41:24,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:41:24,812 WARN L237 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_f26c725f-0997-40d7-b7e7-2010c6c53f57/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-20 11:41:24,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:41:24,862 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 11:41:24,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:41:24,920 WARN L237 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_f26c725f-0997-40d7-b7e7-2010c6c53f57/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-20 11:41:24,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:41:24,938 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:41:24,978 WARN L237 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_f26c725f-0997-40d7-b7e7-2010c6c53f57/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-20 11:41:24,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:41:24,998 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:41:24,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24 WrapperNode [2022-11-20 11:41:24,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:41:25,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:41:25,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:41:25,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:41:25,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,051 INFO L138 Inliner]: procedures = 27, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 305 [2022-11-20 11:41:25,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:41:25,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:41:25,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:41:25,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:41:25,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,086 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:41:25,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:41:25,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:41:25,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:41:25,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (1/1) ... [2022-11-20 11:41:25,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:41:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:41:25,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:41:25,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:41:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:41:25,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 11:41:25,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:41:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 11:41:25,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:41:25,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:41:25,199 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:41:25,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:41:25,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:41:25,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:41:25,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:41:25,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:41:25,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:41:25,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:41:25,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:41:25,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:41:25,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 11:41:25,203 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:41:25,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:41:25,442 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:41:26,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:41:26,710 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:41:26,711 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 11:41:26,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:41:26 BoogieIcfgContainer [2022-11-20 11:41:26,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:41:26,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:41:26,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:41:26,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:41:26,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:41:24" (1/3) ... [2022-11-20 11:41:26,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1faec8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:41:26, skipping insertion in model container [2022-11-20 11:41:26,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:41:24" (2/3) ... [2022-11-20 11:41:26,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1faec8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:41:26, skipping insertion in model container [2022-11-20 11:41:26,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:41:26" (3/3) ... [2022-11-20 11:41:26,725 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-11-20 11:41:26,745 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:41:26,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-20 11:41:26,746 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:41:26,904 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:41:26,954 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:41:26,970 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 293 transitions, 610 flow [2022-11-20 11:41:26,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 293 transitions, 610 flow [2022-11-20 11:41:26,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 293 transitions, 610 flow [2022-11-20 11:41:27,175 INFO L130 PetriNetUnfolder]: 22/290 cut-off events. [2022-11-20 11:41:27,175 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:41:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 290 events. 22/290 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 300 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 237. Up to 3 conditions per place. [2022-11-20 11:41:27,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2022-11-20 11:42:23,202 INFO L134 LiptonReduction]: Checked pairs total: 6382 [2022-11-20 11:42:23,202 INFO L136 LiptonReduction]: Total number of compositions: 312 [2022-11-20 11:42:23,211 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 68 transitions, 160 flow [2022-11-20 11:42:23,376 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:23,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:42:23,402 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;@2e393e7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:42:23,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2022-11-20 11:42:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:42:23,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:23,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:42:23,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash 43280, now seen corresponding path program 1 times [2022-11-20 11:42:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:23,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678533780] [2022-11-20 11:42:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:23,446 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 [2022-11-20 11:42:23,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:23,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:23,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:42:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:23,841 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:42:23,842 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 [2022-11-20 11:42:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:23,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:23,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678533780] [2022-11-20 11:42:23,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678533780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:23,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:23,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:42:23,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453720811] [2022-11-20 11:42:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:23,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:42:23,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:42:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:42:23,942 INFO L87 Difference]: Start difference. First operand has 2868 states, 2190 states have (on average 4.810502283105023) internal successors, (10535), 2867 states have internal predecessors, (10535), 0 states have call successors, (0), 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) [2022-11-20 11:42:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:24,439 INFO L93 Difference]: Finished difference Result 2864 states and 10183 transitions. [2022-11-20 11:42:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:42:24,441 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 [2022-11-20 11:42:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:24,496 INFO L225 Difference]: With dead ends: 2864 [2022-11-20 11:42:24,497 INFO L226 Difference]: Without dead ends: 2864 [2022-11-20 11:42:24,498 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 [2022-11-20 11:42:24,504 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:24,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:42:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-11-20 11:42:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2864. [2022-11-20 11:42:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2190 states have (on average 4.649771689497717) internal successors, (10183), 2863 states have internal predecessors, (10183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10183 transitions. [2022-11-20 11:42:24,772 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10183 transitions. Word has length 2 [2022-11-20 11:42:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:24,773 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 10183 transitions. [2022-11-20 11:42:24,773 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) [2022-11-20 11:42:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10183 transitions. [2022-11-20 11:42:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:42:24,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:24,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:42:24,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:24,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash 43281, now seen corresponding path program 1 times [2022-11-20 11:42:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:24,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004554852] [2022-11-20 11:42:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:24,990 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 [2022-11-20 11:42:24,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:24,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:42:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:25,448 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:42:25,449 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 [2022-11-20 11:42:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:25,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:25,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004554852] [2022-11-20 11:42:25,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004554852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:25,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:25,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:42:25,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005751090] [2022-11-20 11:42:25,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:42:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:42:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:42:25,523 INFO L87 Difference]: Start difference. First operand 2864 states and 10183 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) [2022-11-20 11:42:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:26,416 INFO L93 Difference]: Finished difference Result 5724 states and 20362 transitions. [2022-11-20 11:42:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:42:26,417 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 [2022-11-20 11:42:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:26,503 INFO L225 Difference]: With dead ends: 5724 [2022-11-20 11:42:26,503 INFO L226 Difference]: Without dead ends: 5724 [2022-11-20 11:42:26,504 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 [2022-11-20 11:42:26,509 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:26,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:42:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5724 states. [2022-11-20 11:42:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5724 to 2867. [2022-11-20 11:42:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2193 states have (on average 4.647058823529412) internal successors, (10191), 2866 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 10191 transitions. [2022-11-20 11:42:26,789 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 10191 transitions. Word has length 2 [2022-11-20 11:42:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:26,790 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 10191 transitions. [2022-11-20 11:42:26,791 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) [2022-11-20 11:42:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 10191 transitions. [2022-11-20 11:42:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:42:26,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:26,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:42:26,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-20 11:42:26,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:27,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1347389, now seen corresponding path program 1 times [2022-11-20 11:42:27,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104805035] [2022-11-20 11:42:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:27,002 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 [2022-11-20 11:42:27,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:27,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:27,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:42:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:27,365 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:42:27,366 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 [2022-11-20 11:42:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:27,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:27,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:27,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104805035] [2022-11-20 11:42:27,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104805035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:27,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:42:27,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:42:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912295783] [2022-11-20 11:42:27,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:27,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:42:27,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:42:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:42:27,754 INFO L87 Difference]: Start difference. First operand 2867 states and 10191 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) [2022-11-20 11:42:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:30,664 INFO L93 Difference]: Finished difference Result 8590 states and 30557 transitions. [2022-11-20 11:42:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:42:30,665 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 [2022-11-20 11:42:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:30,824 INFO L225 Difference]: With dead ends: 8590 [2022-11-20 11:42:30,824 INFO L226 Difference]: Without dead ends: 8590 [2022-11-20 11:42:30,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:42:30,825 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 353 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:30,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 11:42:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8590 states. [2022-11-20 11:42:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8590 to 2876. [2022-11-20 11:42:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2202 states have (on average 4.638964577656676) internal successors, (10215), 2875 states have internal predecessors, (10215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 10215 transitions. [2022-11-20 11:42:31,120 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 10215 transitions. Word has length 3 [2022-11-20 11:42:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:31,120 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 10215 transitions. [2022-11-20 11:42:31,120 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) [2022-11-20 11:42:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 10215 transitions. [2022-11-20 11:42:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:42:31,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:31,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:42:31,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:31,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:31,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash 41837190, now seen corresponding path program 1 times [2022-11-20 11:42:31,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:31,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780740818] [2022-11-20 11:42:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:31,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:31,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:42:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:31,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:31,674 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 11:42:31,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 11:42:31,719 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:42:31,720 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 23 treesize of output 19 [2022-11-20 11:42:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:31,815 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 [2022-11-20 11:42:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:31,857 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 [2022-11-20 11:42:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:31,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:31,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780740818] [2022-11-20 11:42:31,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780740818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:31,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:31,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362416713] [2022-11-20 11:42:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:31,900 INFO L87 Difference]: Start difference. First operand 2876 states and 10215 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:32,321 INFO L93 Difference]: Finished difference Result 2315 states and 7970 transitions. [2022-11-20 11:42:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:42:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 11:42:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:32,336 INFO L225 Difference]: With dead ends: 2315 [2022-11-20 11:42:32,336 INFO L226 Difference]: Without dead ends: 2315 [2022-11-20 11:42:32,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:32,338 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:32,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-20 11:42:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-11-20 11:42:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2315. [2022-11-20 11:42:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1817 states have (on average 4.386351128233351) internal successors, (7970), 2314 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7970 transitions. [2022-11-20 11:42:32,435 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7970 transitions. Word has length 4 [2022-11-20 11:42:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:32,435 INFO L495 AbstractCegarLoop]: Abstraction has 2315 states and 7970 transitions. [2022-11-20 11:42:32,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7970 transitions. [2022-11-20 11:42:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:42:32,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:32,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:42:32,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:32,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:32,637 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:32,638 INFO L85 PathProgramCache]: Analyzing trace with hash 41837191, now seen corresponding path program 1 times [2022-11-20 11:42:32,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:32,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394957456] [2022-11-20 11:42:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:32,638 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 [2022-11-20 11:42:32,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:32,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:32,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:42:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:32,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:32,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:32,996 INFO L321 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2022-11-20 11:42:32,997 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 5 case distinctions, treesize of input 45 treesize of output 59 [2022-11-20 11:42:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,281 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-20 11:42:33,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 67 [2022-11-20 11:42:33,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:33,609 INFO L321 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2022-11-20 11:42:33,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 56 [2022-11-20 11:42:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:34,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:34,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:34,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394957456] [2022-11-20 11:42:34,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394957456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:34,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:34,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954026547] [2022-11-20 11:42:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:34,339 INFO L87 Difference]: Start difference. First operand 2315 states and 7970 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:34,654 INFO L93 Difference]: Finished difference Result 2317 states and 7974 transitions. [2022-11-20 11:42:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:42:34,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 11:42:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:34,667 INFO L225 Difference]: With dead ends: 2317 [2022-11-20 11:42:34,667 INFO L226 Difference]: Without dead ends: 2317 [2022-11-20 11:42:34,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:34,668 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:34,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-11-20 11:42:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-11-20 11:42:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2022-11-20 11:42:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1819 states have (on average 4.383727322704783) internal successors, (7974), 2316 states have internal predecessors, (7974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7974 transitions. [2022-11-20 11:42:34,742 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7974 transitions. Word has length 4 [2022-11-20 11:42:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:34,743 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 7974 transitions. [2022-11-20 11:42:34,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7974 transitions. [2022-11-20 11:42:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:42:34,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:34,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:42:34,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:42:34,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:34,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1296952574, now seen corresponding path program 1 times [2022-11-20 11:42:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469486133] [2022-11-20 11:42:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:34,958 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 [2022-11-20 11:42:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:34,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:35,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:42:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:35,270 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:42:35,270 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 [2022-11-20 11:42:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:35,663 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:42:35,663 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 [2022-11-20 11:42:36,033 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:42:36,034 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 51 treesize of output 76 [2022-11-20 11:42:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:42:36,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:36,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469486133] [2022-11-20 11:42:36,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469486133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:36,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:36,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855806181] [2022-11-20 11:42:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:36,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:36,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:36,599 INFO L87 Difference]: Start difference. First operand 2317 states and 7974 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) [2022-11-20 11:42:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:36,956 INFO L93 Difference]: Finished difference Result 2321 states and 7983 transitions. [2022-11-20 11:42:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:42:36,956 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 [2022-11-20 11:42:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:36,966 INFO L225 Difference]: With dead ends: 2321 [2022-11-20 11:42:36,966 INFO L226 Difference]: Without dead ends: 2321 [2022-11-20 11:42:36,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:36,967 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:36,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-11-20 11:42:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-11-20 11:42:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 2321. [2022-11-20 11:42:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 1823 states have (on average 4.37904552934723) internal successors, (7983), 2320 states have internal predecessors, (7983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 7983 transitions. [2022-11-20 11:42:37,041 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 7983 transitions. Word has length 5 [2022-11-20 11:42:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:37,042 INFO L495 AbstractCegarLoop]: Abstraction has 2321 states and 7983 transitions. [2022-11-20 11:42:37,042 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) [2022-11-20 11:42:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 7983 transitions. [2022-11-20 11:42:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:42:37,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:37,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:42:37,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:37,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1296880127, now seen corresponding path program 1 times [2022-11-20 11:42:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:37,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864475528] [2022-11-20 11:42:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:37,258 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 [2022-11-20 11:42:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:37,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:37,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:37,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:42:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:37,557 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:42:37,558 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 [2022-11-20 11:42:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:37,923 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:42:37,923 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 [2022-11-20 11:42:38,402 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:42:38,402 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 [2022-11-20 11:42:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:42:39,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:39,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:39,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864475528] [2022-11-20 11:42:39,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864475528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:39,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:39,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908938082] [2022-11-20 11:42:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:39,150 INFO L87 Difference]: Start difference. First operand 2321 states and 7983 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) [2022-11-20 11:42:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:39,494 INFO L93 Difference]: Finished difference Result 2326 states and 7994 transitions. [2022-11-20 11:42:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:42:39,494 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 [2022-11-20 11:42:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:39,503 INFO L225 Difference]: With dead ends: 2326 [2022-11-20 11:42:39,503 INFO L226 Difference]: Without dead ends: 2326 [2022-11-20 11:42:39,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:39,505 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:39,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-11-20 11:42:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2022-11-20 11:42:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2326. [2022-11-20 11:42:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1828 states have (on average 4.37308533916849) internal successors, (7994), 2325 states have internal predecessors, (7994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 7994 transitions. [2022-11-20 11:42:39,596 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 7994 transitions. Word has length 5 [2022-11-20 11:42:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:39,596 INFO L495 AbstractCegarLoop]: Abstraction has 2326 states and 7994 transitions. [2022-11-20 11:42:39,597 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) [2022-11-20 11:42:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 7994 transitions. [2022-11-20 11:42:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:42:39,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:39,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:42:39,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-20 11:42:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:39,810 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:39,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:39,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1295084979, now seen corresponding path program 1 times [2022-11-20 11:42:39,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:39,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074994132] [2022-11-20 11:42:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:39,811 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 [2022-11-20 11:42:39,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:39,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:39,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:42:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:40,077 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:42:40,078 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 [2022-11-20 11:42:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:40,436 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:42:40,436 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 [2022-11-20 11:42:40,808 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:42:40,809 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 [2022-11-20 11:42:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:42:43,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:43,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074994132] [2022-11-20 11:42:43,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074994132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:43,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:43,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:42:43,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429196872] [2022-11-20 11:42:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:43,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:42:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:42:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 11:42:43,466 INFO L87 Difference]: Start difference. First operand 2326 states and 7994 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-20 11:42:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:43,780 INFO L93 Difference]: Finished difference Result 2327 states and 7996 transitions. [2022-11-20 11:42:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:42:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2022-11-20 11:42:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:43,787 INFO L225 Difference]: With dead ends: 2327 [2022-11-20 11:42:43,787 INFO L226 Difference]: Without dead ends: 2327 [2022-11-20 11:42:43,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 11:42:43,788 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:43,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-11-20 11:42:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2022-11-20 11:42:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2326. [2022-11-20 11:42:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1828 states have (on average 4.37308533916849) internal successors, (7994), 2325 states have internal predecessors, (7994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 7994 transitions. [2022-11-20 11:42:43,856 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 7994 transitions. Word has length 5 [2022-11-20 11:42:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:43,857 INFO L495 AbstractCegarLoop]: Abstraction has 2326 states and 7994 transitions. [2022-11-20 11:42:43,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-20 11:42:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 7994 transitions. [2022-11-20 11:42:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:42:43,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:43,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:42:43,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:44,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:44,070 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:44,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:44,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1550865643, now seen corresponding path program 1 times [2022-11-20 11:42:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:44,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371583672] [2022-11-20 11:42:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:44,072 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 [2022-11-20 11:42:44,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:44,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:44,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:42:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:44,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:44,392 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 11:42:44,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 11:42:44,408 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 42 treesize of output 38 [2022-11-20 11:42:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:44,489 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 [2022-11-20 11:42:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:44,522 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 [2022-11-20 11:42:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:44,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:44,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:44,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371583672] [2022-11-20 11:42:44,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371583672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:44,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:44,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:44,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019973274] [2022-11-20 11:42:44,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:44,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:44,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:44,586 INFO L87 Difference]: Start difference. First operand 2326 states and 7994 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:45,046 INFO L93 Difference]: Finished difference Result 2260 states and 7806 transitions. [2022-11-20 11:42:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:42:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:42:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:45,055 INFO L225 Difference]: With dead ends: 2260 [2022-11-20 11:42:45,055 INFO L226 Difference]: Without dead ends: 2260 [2022-11-20 11:42:45,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:45,058 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:45,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-20 11:42:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-11-20 11:42:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-11-20 11:42:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1794 states have (on average 4.351170568561873) internal successors, (7806), 2259 states have internal predecessors, (7806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7806 transitions. [2022-11-20 11:42:45,132 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7806 transitions. Word has length 6 [2022-11-20 11:42:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:45,133 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 7806 transitions. [2022-11-20 11:42:45,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7806 transitions. [2022-11-20 11:42:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:42:45,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:45,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:42:45,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:45,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:45,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1550865644, now seen corresponding path program 1 times [2022-11-20 11:42:45,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:45,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30384417] [2022-11-20 11:42:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:45,348 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 [2022-11-20 11:42:45,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:45,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:45,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:42:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:45,585 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 11:42:45,585 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 [2022-11-20 11:42:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:45,860 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 11:42:45,860 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 21 treesize of output 36 [2022-11-20 11:42:46,095 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 11:42:46,095 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 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 11:42:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:46,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:46,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:46,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30384417] [2022-11-20 11:42:46,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30384417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:46,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:46,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473876855] [2022-11-20 11:42:46,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:46,301 INFO L87 Difference]: Start difference. First operand 2260 states and 7806 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:46,637 INFO L93 Difference]: Finished difference Result 2262 states and 7809 transitions. [2022-11-20 11:42:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:42:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:42:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:46,648 INFO L225 Difference]: With dead ends: 2262 [2022-11-20 11:42:46,648 INFO L226 Difference]: Without dead ends: 2262 [2022-11-20 11:42:46,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:46,649 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-20 11:42:46,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-11-20 11:42:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2022-11-20 11:42:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 1796 states have (on average 4.347995545657016) internal successors, (7809), 2261 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 7809 transitions. [2022-11-20 11:42:46,739 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 7809 transitions. Word has length 6 [2022-11-20 11:42:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:46,739 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 7809 transitions. [2022-11-20 11:42:46,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 7809 transitions. [2022-11-20 11:42:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:42:46,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:46,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:42:46,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:46,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1548577926, now seen corresponding path program 1 times [2022-11-20 11:42:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130036676] [2022-11-20 11:42:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:46,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:46,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:42:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:47,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:47,261 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:42:47,262 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 [2022-11-20 11:42:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:47,566 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:42:47,566 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 [2022-11-20 11:42:47,996 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:42:47,997 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 [2022-11-20 11:42:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:42:49,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:49,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130036676] [2022-11-20 11:42:49,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130036676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:49,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:49,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222174487] [2022-11-20 11:42:49,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:49,092 INFO L87 Difference]: Start difference. First operand 2262 states and 7809 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:49,441 INFO L93 Difference]: Finished difference Result 2267 states and 7820 transitions. [2022-11-20 11:42:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:42:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:42:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:49,448 INFO L225 Difference]: With dead ends: 2267 [2022-11-20 11:42:49,448 INFO L226 Difference]: Without dead ends: 2267 [2022-11-20 11:42:49,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:49,449 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:49,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-20 11:42:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2022-11-20 11:42:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2263. [2022-11-20 11:42:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1797 states have (on average 4.346688925987757) internal successors, (7811), 2262 states have internal predecessors, (7811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7811 transitions. [2022-11-20 11:42:49,518 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7811 transitions. Word has length 6 [2022-11-20 11:42:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:49,518 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 7811 transitions. [2022-11-20 11:42:49,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7811 transitions. [2022-11-20 11:42:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:42:49,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:49,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:42:49,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:49,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:49,732 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1492928338, now seen corresponding path program 1 times [2022-11-20 11:42:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:49,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861338123] [2022-11-20 11:42:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:49,733 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 [2022-11-20 11:42:49,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:49,734 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:49,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:42:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:50,015 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:42:50,016 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 [2022-11-20 11:42:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:50,357 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:42:50,358 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 [2022-11-20 11:42:50,707 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:42:50,707 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 [2022-11-20 11:42:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:42:51,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:51,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:51,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861338123] [2022-11-20 11:42:51,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861338123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:51,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:51,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201613746] [2022-11-20 11:42:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:51,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:42:51,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:51,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:42:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:51,666 INFO L87 Difference]: Start difference. First operand 2263 states and 7811 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:51,968 INFO L93 Difference]: Finished difference Result 2271 states and 7829 transitions. [2022-11-20 11:42:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:42:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:42:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:51,975 INFO L225 Difference]: With dead ends: 2271 [2022-11-20 11:42:51,975 INFO L226 Difference]: Without dead ends: 2271 [2022-11-20 11:42:51,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:42:51,976 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:51,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-20 11:42:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-11-20 11:42:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2262. [2022-11-20 11:42:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 1796 states have (on average 4.347995545657016) internal successors, (7809), 2261 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 7809 transitions. [2022-11-20 11:42:52,040 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 7809 transitions. Word has length 6 [2022-11-20 11:42:52,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:52,041 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 7809 transitions. [2022-11-20 11:42:52,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 7809 transitions. [2022-11-20 11:42:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:42:52,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:52,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:42:52,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:52,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:52,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1492855891, now seen corresponding path program 1 times [2022-11-20 11:42:52,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:52,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875587103] [2022-11-20 11:42:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:52,255 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 [2022-11-20 11:42:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:52,257 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:52,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:42:52,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:52,570 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:42:52,571 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 [2022-11-20 11:42:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:42:52,948 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:42:52,948 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 [2022-11-20 11:42:53,390 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:42:53,390 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 [2022-11-20 11:42:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:42:56,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:42:56,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:56,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875587103] [2022-11-20 11:42:56,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875587103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:56,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:42:56,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480695462] [2022-11-20 11:42:56,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:42:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:42:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 11:42:56,008 INFO L87 Difference]: Start difference. First operand 2262 states and 7809 transitions. Second operand has 5 states, 4 states have (on average 1.5) 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) [2022-11-20 11:42:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:56,299 INFO L93 Difference]: Finished difference Result 2262 states and 7808 transitions. [2022-11-20 11:42:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:42:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) 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 [2022-11-20 11:42:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:56,306 INFO L225 Difference]: With dead ends: 2262 [2022-11-20 11:42:56,306 INFO L226 Difference]: Without dead ends: 2262 [2022-11-20 11:42:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 11:42:56,307 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:56,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2022-11-20 11:42:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-11-20 11:42:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2022-11-20 11:42:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 1796 states have (on average 4.347438752783964) internal successors, (7808), 2261 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 7808 transitions. [2022-11-20 11:42:56,363 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 7808 transitions. Word has length 6 [2022-11-20 11:42:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:56,364 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 7808 transitions. [2022-11-20 11:42:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) 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) [2022-11-20 11:42:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 7808 transitions. [2022-11-20 11:42:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:42:56,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:56,365 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 11:42:56,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:42:56,579 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:42:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1490998289, now seen corresponding path program 2 times [2022-11-20 11:42:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575353516] [2022-11-20 11:42:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:42:56,579 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 [2022-11-20 11:42:56,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:56,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:42:56,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:42:56,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:42:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:42:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:42:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:56,862 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:42:56,863 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 [2022-11-20 11:42:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:57,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:57,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:42:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575353516] [2022-11-20 11:42:57,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575353516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:57,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:42:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:42:57,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979896588] [2022-11-20 11:42:57,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:57,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:42:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:42:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:42:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:42:57,949 INFO L87 Difference]: Start difference. First operand 2262 states and 7808 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) [2022-11-20 11:43:02,046 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 [] [2022-11-20 11:43:04,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:05,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:07,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:09,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:11,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:12,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:14,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:16,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:22,807 INFO L93 Difference]: Finished difference Result 17896 states and 62063 transitions. [2022-11-20 11:43:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:43:22,808 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 [2022-11-20 11:43:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:22,874 INFO L225 Difference]: With dead ends: 17896 [2022-11-20 11:43:22,874 INFO L226 Difference]: Without dead ends: 17896 [2022-11-20 11:43:22,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:43:22,875 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1147 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 146 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:22,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 0 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1502 Invalid, 4 Unknown, 0 Unchecked, 23.1s Time] [2022-11-20 11:43:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17896 states. [2022-11-20 11:43:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17896 to 2286. [2022-11-20 11:43:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 1820 states have (on average 4.3197802197802195) internal successors, (7862), 2285 states have internal predecessors, (7862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7862 transitions. [2022-11-20 11:43:23,027 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7862 transitions. Word has length 6 [2022-11-20 11:43:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:23,028 INFO L495 AbstractCegarLoop]: Abstraction has 2286 states and 7862 transitions. [2022-11-20 11:43:23,028 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) [2022-11-20 11:43:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7862 transitions. [2022-11-20 11:43:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:43:23,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:23,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:23,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:23,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 830938531, now seen corresponding path program 1 times [2022-11-20 11:43:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988915507] [2022-11-20 11:43:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:23,243 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 [2022-11-20 11:43:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:23,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:23,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:43:23,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:23,545 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 11:43:23,545 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 [2022-11-20 11:43:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:23,641 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 [2022-11-20 11:43:23,700 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:23,700 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 [2022-11-20 11:43:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:23,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:23,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988915507] [2022-11-20 11:43:23,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988915507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:23,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:23,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:23,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263263380] [2022-11-20 11:43:23,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:23,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:23,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:23,744 INFO L87 Difference]: Start difference. First operand 2286 states and 7862 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 11:43:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:24,115 INFO L93 Difference]: Finished difference Result 2220 states and 7674 transitions. [2022-11-20 11:43:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-20 11:43:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:24,123 INFO L225 Difference]: With dead ends: 2220 [2022-11-20 11:43:24,123 INFO L226 Difference]: Without dead ends: 2220 [2022-11-20 11:43:24,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:24,124 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:24,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-20 11:43:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-11-20 11:43:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2217. [2022-11-20 11:43:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 1783 states have (on average 4.301177790241167) internal successors, (7669), 2216 states have internal predecessors, (7669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 7669 transitions. [2022-11-20 11:43:24,165 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 7669 transitions. Word has length 7 [2022-11-20 11:43:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:24,165 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 7669 transitions. [2022-11-20 11:43:24,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 11:43:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 7669 transitions. [2022-11-20 11:43:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:43:24,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:24,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:24,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:24,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:24,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash 832194733, now seen corresponding path program 1 times [2022-11-20 11:43:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:24,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228203670] [2022-11-20 11:43:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:24,367 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 [2022-11-20 11:43:24,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:24,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:24,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:43:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:24,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:24,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:24,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228203670] [2022-11-20 11:43:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228203670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:24,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112190260] [2022-11-20 11:43:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:24,565 INFO L87 Difference]: Start difference. First operand 2217 states and 7669 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 11:43:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:25,261 INFO L93 Difference]: Finished difference Result 2333 states and 7951 transitions. [2022-11-20 11:43:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:25,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-20 11:43:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:25,273 INFO L225 Difference]: With dead ends: 2333 [2022-11-20 11:43:25,274 INFO L226 Difference]: Without dead ends: 2329 [2022-11-20 11:43:25,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:25,275 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:25,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:43:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-11-20 11:43:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2327. [2022-11-20 11:43:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 1882 states have (on average 4.218384697130712) internal successors, (7939), 2326 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7939 transitions. [2022-11-20 11:43:25,374 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7939 transitions. Word has length 7 [2022-11-20 11:43:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:25,375 INFO L495 AbstractCegarLoop]: Abstraction has 2327 states and 7939 transitions. [2022-11-20 11:43:25,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 11:43:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7939 transitions. [2022-11-20 11:43:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:43:25,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:25,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:25,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:25,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:25,588 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -966107982, now seen corresponding path program 1 times [2022-11-20 11:43:25,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:25,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397014128] [2022-11-20 11:43:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:25,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:25,591 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:25,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:43:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:25,931 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:43:25,932 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 [2022-11-20 11:43:26,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:26,236 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:43:26,236 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 [2022-11-20 11:43:26,640 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:43:26,641 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 [2022-11-20 11:43:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:43:27,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:27,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397014128] [2022-11-20 11:43:27,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397014128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:27,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:27,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:27,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696222932] [2022-11-20 11:43:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:27,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:27,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:27,215 INFO L87 Difference]: Start difference. First operand 2327 states and 7939 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 11:43:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:27,524 INFO L93 Difference]: Finished difference Result 2326 states and 7931 transitions. [2022-11-20 11:43:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:27,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2022-11-20 11:43:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:27,534 INFO L225 Difference]: With dead ends: 2326 [2022-11-20 11:43:27,534 INFO L226 Difference]: Without dead ends: 2326 [2022-11-20 11:43:27,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:27,535 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:27,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-11-20 11:43:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2022-11-20 11:43:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2317. [2022-11-20 11:43:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1873 states have (on average 4.224239188467699) internal successors, (7912), 2316 states have internal predecessors, (7912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7912 transitions. [2022-11-20 11:43:27,597 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7912 transitions. Word has length 7 [2022-11-20 11:43:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:27,598 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 7912 transitions. [2022-11-20 11:43:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2022-11-20 11:43:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7912 transitions. [2022-11-20 11:43:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:43:27,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:27,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:27,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:27,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:27,812 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 28262887, now seen corresponding path program 1 times [2022-11-20 11:43:27,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:27,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425974264] [2022-11-20 11:43:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:27,813 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 [2022-11-20 11:43:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:27,814 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:27,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:43:28,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:28,085 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:43:28,085 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 [2022-11-20 11:43:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:28,131 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 [2022-11-20 11:43:28,172 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:28,172 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 [2022-11-20 11:43:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:28,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:28,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425974264] [2022-11-20 11:43:28,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425974264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:28,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:28,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:28,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592628129] [2022-11-20 11:43:28,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:28,233 INFO L87 Difference]: Start difference. First operand 2317 states and 7912 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:28,640 INFO L93 Difference]: Finished difference Result 2327 states and 7934 transitions. [2022-11-20 11:43:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:43:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:28,651 INFO L225 Difference]: With dead ends: 2327 [2022-11-20 11:43:28,652 INFO L226 Difference]: Without dead ends: 2327 [2022-11-20 11:43:28,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:28,653 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:28,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-20 11:43:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2022-11-20 11:43:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2327. [2022-11-20 11:43:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 1883 states have (on average 4.213489113117366) internal successors, (7934), 2326 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7934 transitions. [2022-11-20 11:43:28,714 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7934 transitions. Word has length 8 [2022-11-20 11:43:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:28,715 INFO L495 AbstractCegarLoop]: Abstraction has 2327 states and 7934 transitions. [2022-11-20 11:43:28,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7934 transitions. [2022-11-20 11:43:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:43:28,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:28,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:28,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:28,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash 28262888, now seen corresponding path program 1 times [2022-11-20 11:43:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:28,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364292183] [2022-11-20 11:43:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:28,930 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 [2022-11-20 11:43:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:28,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:28,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:43:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:29,273 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 11:43:29,273 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 [2022-11-20 11:43:29,294 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 510 treesize of output 494 [2022-11-20 11:43:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:29,371 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 [2022-11-20 11:43:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:29,411 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 [2022-11-20 11:43:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:29,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:29,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364292183] [2022-11-20 11:43:29,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364292183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:29,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:29,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724299604] [2022-11-20 11:43:29,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:29,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:43:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:43:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:29,497 INFO L87 Difference]: Start difference. First operand 2327 states and 7934 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:29,884 INFO L93 Difference]: Finished difference Result 2236 states and 7670 transitions. [2022-11-20 11:43:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:43:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:29,893 INFO L225 Difference]: With dead ends: 2236 [2022-11-20 11:43:29,893 INFO L226 Difference]: Without dead ends: 2236 [2022-11-20 11:43:29,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:29,893 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:29,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-20 11:43:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-11-20 11:43:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2236. [2022-11-20 11:43:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 1833 states have (on average 4.184397163120567) internal successors, (7670), 2235 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7670 transitions. [2022-11-20 11:43:29,952 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7670 transitions. Word has length 8 [2022-11-20 11:43:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:29,952 INFO L495 AbstractCegarLoop]: Abstraction has 2236 states and 7670 transitions. [2022-11-20 11:43:29,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7670 transitions. [2022-11-20 11:43:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:43:29,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:29,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:29,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:30,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:30,166 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash 186342913, now seen corresponding path program 1 times [2022-11-20 11:43:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:30,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980794943] [2022-11-20 11:43:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:30,167 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 [2022-11-20 11:43:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:30,169 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:30,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:43:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:30,424 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:43:30,425 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 [2022-11-20 11:43:30,460 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:43:30,462 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 [2022-11-20 11:43:30,485 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:30,486 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 [2022-11-20 11:43:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:30,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:30,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:30,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980794943] [2022-11-20 11:43:30,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980794943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:30,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:30,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400610924] [2022-11-20 11:43:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:30,505 INFO L87 Difference]: Start difference. First operand 2236 states and 7670 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:30,843 INFO L93 Difference]: Finished difference Result 1642 states and 5556 transitions. [2022-11-20 11:43:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:43:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:30,849 INFO L225 Difference]: With dead ends: 1642 [2022-11-20 11:43:30,849 INFO L226 Difference]: Without dead ends: 1642 [2022-11-20 11:43:30,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:30,850 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:30,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:43:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-11-20 11:43:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-11-20 11:43:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1404 states have (on average 3.9572649572649574) internal successors, (5556), 1641 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5556 transitions. [2022-11-20 11:43:30,917 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5556 transitions. Word has length 8 [2022-11-20 11:43:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:30,917 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 5556 transitions. [2022-11-20 11:43:30,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5556 transitions. [2022-11-20 11:43:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:43:30,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:30,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:30,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:31,131 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 186342914, now seen corresponding path program 1 times [2022-11-20 11:43:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:31,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682935398] [2022-11-20 11:43:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:31,132 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 [2022-11-20 11:43:31,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:31,133 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:31,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:43:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:31,453 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:43:31,453 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:43:31,594 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:43:31,594 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 [2022-11-20 11:43:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:31,754 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 [2022-11-20 11:43:31,782 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:43:31,782 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 [2022-11-20 11:43:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:31,846 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 [2022-11-20 11:43:31,858 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:43:31,859 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 [2022-11-20 11:43:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:31,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:38,411 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:43:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:45,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682935398] [2022-11-20 11:43:45,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682935398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:45,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:43:45,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:43:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421444091] [2022-11-20 11:43:45,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:45,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:43:45,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:43:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:43:45,905 INFO L87 Difference]: Start difference. First operand 1642 states and 5556 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:46,641 INFO L93 Difference]: Finished difference Result 1663 states and 5598 transitions. [2022-11-20 11:43:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:43:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:43:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:46,648 INFO L225 Difference]: With dead ends: 1663 [2022-11-20 11:43:46,648 INFO L226 Difference]: Without dead ends: 1663 [2022-11-20 11:43:46,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:43:46,649 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 151 Unchecked, 0.7s Time] [2022-11-20 11:43:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-11-20 11:43:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1653. [2022-11-20 11:43:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1415 states have (on average 3.945583038869258) internal successors, (5583), 1652 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) [2022-11-20 11:43:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5583 transitions. [2022-11-20 11:43:46,694 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5583 transitions. Word has length 8 [2022-11-20 11:43:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:46,695 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 5583 transitions. [2022-11-20 11:43:46,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5583 transitions. [2022-11-20 11:43:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:43:46,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:46,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:46,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:46,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:46,908 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash 186342891, now seen corresponding path program 1 times [2022-11-20 11:43:46,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:46,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378505986] [2022-11-20 11:43:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:46,911 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:46,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:43:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:47,097 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 [2022-11-20 11:43:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:47,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:47,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:47,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378505986] [2022-11-20 11:43:47,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378505986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:47,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:47,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007328997] [2022-11-20 11:43:47,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:47,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:47,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:47,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:47,130 INFO L87 Difference]: Start difference. First operand 1653 states and 5583 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:47,519 INFO L93 Difference]: Finished difference Result 1307 states and 4356 transitions. [2022-11-20 11:43:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:43:47,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:43:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:47,524 INFO L225 Difference]: With dead ends: 1307 [2022-11-20 11:43:47,524 INFO L226 Difference]: Without dead ends: 1307 [2022-11-20 11:43:47,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:47,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:47,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:43:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-11-20 11:43:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1307. [2022-11-20 11:43:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1148 states have (on average 3.794425087108014) internal successors, (4356), 1306 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4356 transitions. [2022-11-20 11:43:47,559 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4356 transitions. Word has length 8 [2022-11-20 11:43:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:47,559 INFO L495 AbstractCegarLoop]: Abstraction has 1307 states and 4356 transitions. [2022-11-20 11:43:47,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4356 transitions. [2022-11-20 11:43:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:43:47,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:47,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:47,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:47,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:47,774 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 186342892, now seen corresponding path program 1 times [2022-11-20 11:43:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:47,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216420008] [2022-11-20 11:43:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:47,775 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 [2022-11-20 11:43:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:47,776 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:47,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:43:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:47,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:47,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:47,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216420008] [2022-11-20 11:43:47,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216420008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:47,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:47,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811440141] [2022-11-20 11:43:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:47,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:47,941 INFO L87 Difference]: Start difference. First operand 1307 states and 4356 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:48,425 INFO L93 Difference]: Finished difference Result 1883 states and 6400 transitions. [2022-11-20 11:43:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:48,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:43:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:48,432 INFO L225 Difference]: With dead ends: 1883 [2022-11-20 11:43:48,432 INFO L226 Difference]: Without dead ends: 1883 [2022-11-20 11:43:48,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:48,433 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:48,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:43:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-11-20 11:43:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1514. [2022-11-20 11:43:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1331 states have (on average 3.996243425995492) internal successors, (5319), 1513 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5319 transitions. [2022-11-20 11:43:48,487 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5319 transitions. Word has length 8 [2022-11-20 11:43:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:48,487 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 5319 transitions. [2022-11-20 11:43:48,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5319 transitions. [2022-11-20 11:43:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:48,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:48,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:48,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:48,689 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash -331958050, now seen corresponding path program 1 times [2022-11-20 11:43:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:48,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213310684] [2022-11-20 11:43:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:48,690 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 [2022-11-20 11:43:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:48,691 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:48,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:43:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:49,053 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:43:49,053 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 [2022-11-20 11:43:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:49,111 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 [2022-11-20 11:43:49,176 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:49,176 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 [2022-11-20 11:43:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:49,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:49,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:49,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213310684] [2022-11-20 11:43:49,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213310684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:49,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:49,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166870147] [2022-11-20 11:43:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:49,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:49,274 INFO L87 Difference]: Start difference. First operand 1514 states and 5319 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:49,664 INFO L93 Difference]: Finished difference Result 1538 states and 5369 transitions. [2022-11-20 11:43:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:43:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:49,669 INFO L225 Difference]: With dead ends: 1538 [2022-11-20 11:43:49,669 INFO L226 Difference]: Without dead ends: 1538 [2022-11-20 11:43:49,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:49,670 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:43:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-11-20 11:43:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1530. [2022-11-20 11:43:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1347 states have (on average 3.974016332590943) internal successors, (5353), 1529 states have internal predecessors, (5353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5353 transitions. [2022-11-20 11:43:49,696 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5353 transitions. Word has length 9 [2022-11-20 11:43:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:49,697 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 5353 transitions. [2022-11-20 11:43:49,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5353 transitions. [2022-11-20 11:43:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:49,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:49,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:49,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:49,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:49,898 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash 875262643, now seen corresponding path program 1 times [2022-11-20 11:43:49,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:49,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300364684] [2022-11-20 11:43:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:49,899 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 [2022-11-20 11:43:49,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:49,900 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:49,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:43:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:50,180 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:43:50,180 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:43:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:50,248 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 [2022-11-20 11:43:50,306 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:50,306 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 [2022-11-20 11:43:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:50,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:50,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:50,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300364684] [2022-11-20 11:43:50,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300364684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:50,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:50,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:50,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102611737] [2022-11-20 11:43:50,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:50,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:50,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:50,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:50,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:50,409 INFO L87 Difference]: Start difference. First operand 1530 states and 5353 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:50,779 INFO L93 Difference]: Finished difference Result 1544 states and 5389 transitions. [2022-11-20 11:43:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:43:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:50,784 INFO L225 Difference]: With dead ends: 1544 [2022-11-20 11:43:50,784 INFO L226 Difference]: Without dead ends: 1544 [2022-11-20 11:43:50,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:50,785 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:50,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-11-20 11:43:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-11-20 11:43:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2022-11-20 11:43:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1361 states have (on average 3.9595885378398235) internal successors, (5389), 1543 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5389 transitions. [2022-11-20 11:43:50,845 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5389 transitions. Word has length 9 [2022-11-20 11:43:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:50,845 INFO L495 AbstractCegarLoop]: Abstraction has 1544 states and 5389 transitions. [2022-11-20 11:43:50,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5389 transitions. [2022-11-20 11:43:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:50,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:50,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:50,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:51,047 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:51,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:51,047 INFO L85 PathProgramCache]: Analyzing trace with hash 876145833, now seen corresponding path program 1 times [2022-11-20 11:43:51,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:51,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615362659] [2022-11-20 11:43:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:51,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:51,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:51,050 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:51,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:43:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:51,317 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:43:51,318 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 [2022-11-20 11:43:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:51,376 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 [2022-11-20 11:43:51,433 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:51,433 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 [2022-11-20 11:43:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:51,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:51,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:51,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615362659] [2022-11-20 11:43:51,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615362659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:51,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:51,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:51,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024025804] [2022-11-20 11:43:51,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:51,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:51,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:51,545 INFO L87 Difference]: Start difference. First operand 1544 states and 5389 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:51,904 INFO L93 Difference]: Finished difference Result 1546 states and 5397 transitions. [2022-11-20 11:43:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:43:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:51,909 INFO L225 Difference]: With dead ends: 1546 [2022-11-20 11:43:51,909 INFO L226 Difference]: Without dead ends: 1546 [2022-11-20 11:43:51,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:51,910 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:51,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:43:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2022-11-20 11:43:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1546. [2022-11-20 11:43:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1363 states have (on average 3.95964783565664) internal successors, (5397), 1545 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5397 transitions. [2022-11-20 11:43:51,942 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5397 transitions. Word has length 9 [2022-11-20 11:43:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:51,943 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 5397 transitions. [2022-11-20 11:43:51,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5397 transitions. [2022-11-20 11:43:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:51,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:51,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:51,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:43:52,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:52,158 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1481192799, now seen corresponding path program 1 times [2022-11-20 11:43:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:52,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716001353] [2022-11-20 11:43:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:52,159 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 [2022-11-20 11:43:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:52,160 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:52,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:43:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:52,472 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:43:52,472 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 [2022-11-20 11:43:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:52,532 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 [2022-11-20 11:43:52,597 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:43:52,597 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 [2022-11-20 11:43:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:43:52,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:43:52,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:52,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716001353] [2022-11-20 11:43:52,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716001353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:52,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:52,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:52,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417774276] [2022-11-20 11:43:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:52,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:43:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:43:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:43:52,672 INFO L87 Difference]: Start difference. First operand 1546 states and 5397 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:53,067 INFO L93 Difference]: Finished difference Result 1554 states and 5413 transitions. [2022-11-20 11:43:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:43:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:43:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:53,072 INFO L225 Difference]: With dead ends: 1554 [2022-11-20 11:43:53,072 INFO L226 Difference]: Without dead ends: 1554 [2022-11-20 11:43:53,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:43:53,073 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:53,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:43:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-20 11:43:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1546. [2022-11-20 11:43:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1363 states have (on average 3.95964783565664) internal successors, (5397), 1545 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5397 transitions. [2022-11-20 11:43:53,112 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5397 transitions. Word has length 9 [2022-11-20 11:43:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:53,113 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 5397 transitions. [2022-11-20 11:43:53,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5397 transitions. [2022-11-20 11:43:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:53,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:53,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:53,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:53,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:53,315 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1442720771, now seen corresponding path program 1 times [2022-11-20 11:43:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394821881] [2022-11-20 11:43:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:53,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:53,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:53,317 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:53,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:43:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:53,773 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:43:53,773 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:43:53,978 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:43:53,978 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 [2022-11-20 11:43:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:54,175 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 [2022-11-20 11:43:54,191 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:43:54,191 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 [2022-11-20 11:43:54,294 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:43:54,294 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 [2022-11-20 11:43:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:54,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:57,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:43:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394821881] [2022-11-20 11:43:57,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394821881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:57,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:43:57,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 11:43:57,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690383491] [2022-11-20 11:43:57,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:57,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:43:57,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:43:57,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:43:57,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:43:57,130 INFO L87 Difference]: Start difference. First operand 1546 states and 5397 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-20 11:43:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:58,146 INFO L93 Difference]: Finished difference Result 2464 states and 8618 transitions. [2022-11-20 11:43:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:43:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:43:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:58,156 INFO L225 Difference]: With dead ends: 2464 [2022-11-20 11:43:58,156 INFO L226 Difference]: Without dead ends: 2464 [2022-11-20 11:43:58,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:43:58,156 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:58,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 325 Unchecked, 1.0s Time] [2022-11-20 11:43:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-11-20 11:43:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2267. [2022-11-20 11:43:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2084 states have (on average 3.9884836852207295) internal successors, (8312), 2266 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 8312 transitions. [2022-11-20 11:43:58,208 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 8312 transitions. Word has length 9 [2022-11-20 11:43:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:58,208 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 8312 transitions. [2022-11-20 11:43:58,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-20 11:43:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 8312 transitions. [2022-11-20 11:43:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:43:58,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:58,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:58,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:58,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:43:58,422 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:43:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1481664521, now seen corresponding path program 1 times [2022-11-20 11:43:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:43:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338698110] [2022-11-20 11:43:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:58,423 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 [2022-11-20 11:43:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:43:58,424 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:43:58,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:43:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:43:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:58,831 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:43:58,831 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 [2022-11-20 11:43:59,029 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:43:59,030 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 [2022-11-20 11:43:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:59,241 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 [2022-11-20 11:43:59,294 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:43:59,294 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 [2022-11-20 11:43:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:43:59,364 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 [2022-11-20 11:43:59,386 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:43:59,387 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 [2022-11-20 11:43:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:01,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:01,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338698110] [2022-11-20 11:44:01,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338698110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:01,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:44:01,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:44:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083129950] [2022-11-20 11:44:01,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:01,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:44:01,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:44:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:44:01,691 INFO L87 Difference]: Start difference. First operand 2267 states and 8312 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-20 11:44:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:02,296 INFO L93 Difference]: Finished difference Result 2283 states and 8335 transitions. [2022-11-20 11:44:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:44:02,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:44:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:02,304 INFO L225 Difference]: With dead ends: 2283 [2022-11-20 11:44:02,304 INFO L226 Difference]: Without dead ends: 2283 [2022-11-20 11:44:02,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:44:02,305 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:02,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-11-20 11:44:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-11-20 11:44:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2271. [2022-11-20 11:44:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2088 states have (on average 3.986111111111111) internal successors, (8323), 2270 states have internal predecessors, (8323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 8323 transitions. [2022-11-20 11:44:02,385 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 8323 transitions. Word has length 9 [2022-11-20 11:44:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:02,385 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 8323 transitions. [2022-11-20 11:44:02,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-20 11:44:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 8323 transitions. [2022-11-20 11:44:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:44:02,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:02,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:02,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:02,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:02,595 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -715547806, now seen corresponding path program 1 times [2022-11-20 11:44:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320079540] [2022-11-20 11:44:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:02,596 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 [2022-11-20 11:44:02,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:02,597 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:02,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:44:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:03,040 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:44:03,040 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 [2022-11-20 11:44:03,244 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:44:03,244 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 [2022-11-20 11:44:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:03,430 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 [2022-11-20 11:44:03,469 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:44:03,469 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 [2022-11-20 11:44:03,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:03,556 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 [2022-11-20 11:44:03,571 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:44:03,572 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 [2022-11-20 11:44:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:44:03,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:13,352 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:44:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:44:13,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320079540] [2022-11-20 11:44:13,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320079540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:13,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:44:13,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:44:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878733232] [2022-11-20 11:44:13,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:44:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:44:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:44:13,355 INFO L87 Difference]: Start difference. First operand 2271 states and 8323 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-20 11:44:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:14,081 INFO L93 Difference]: Finished difference Result 2304 states and 8388 transitions. [2022-11-20 11:44:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:44:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:44:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:14,089 INFO L225 Difference]: With dead ends: 2304 [2022-11-20 11:44:14,089 INFO L226 Difference]: Without dead ends: 2304 [2022-11-20 11:44:14,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:44:14,090 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:14,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 171 Unchecked, 0.7s Time] [2022-11-20 11:44:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-11-20 11:44:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2294. [2022-11-20 11:44:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2111 states have (on average 3.966366650876362) internal successors, (8373), 2293 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8373 transitions. [2022-11-20 11:44:14,151 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8373 transitions. Word has length 9 [2022-11-20 11:44:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:14,152 INFO L495 AbstractCegarLoop]: Abstraction has 2294 states and 8373 transitions. [2022-11-20 11:44:14,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-20 11:44:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8373 transitions. [2022-11-20 11:44:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:44:14,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:14,153 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:14,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:14,359 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1639772822, now seen corresponding path program 1 times [2022-11-20 11:44:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384116574] [2022-11-20 11:44:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:14,360 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 [2022-11-20 11:44:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:14,361 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:14,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:44:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:14,814 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:44:14,815 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 [2022-11-20 11:44:15,021 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:44:15,021 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:44:15,388 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:44:15,388 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 [2022-11-20 11:44:15,402 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 21 [2022-11-20 11:44:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:15,507 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 [2022-11-20 11:44:15,534 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:44:15,534 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 [2022-11-20 11:44:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:15,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:27,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:27,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384116574] [2022-11-20 11:44:27,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384116574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:27,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:44:27,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:44:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881524090] [2022-11-20 11:44:27,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:27,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:44:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:44:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:44:27,342 INFO L87 Difference]: Start difference. First operand 2294 states and 8373 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:30,227 INFO L93 Difference]: Finished difference Result 2299 states and 8383 transitions. [2022-11-20 11:44:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:44:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:44:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:30,235 INFO L225 Difference]: With dead ends: 2299 [2022-11-20 11:44:30,235 INFO L226 Difference]: Without dead ends: 2299 [2022-11-20 11:44:30,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:44:30,236 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:30,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 226 Unchecked, 1.1s Time] [2022-11-20 11:44:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2022-11-20 11:44:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2299. [2022-11-20 11:44:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2116 states have (on average 3.9617202268431) internal successors, (8383), 2298 states have internal predecessors, (8383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 8383 transitions. [2022-11-20 11:44:30,287 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 8383 transitions. Word has length 9 [2022-11-20 11:44:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:30,287 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 8383 transitions. [2022-11-20 11:44:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 8383 transitions. [2022-11-20 11:44:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:30,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:30,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:30,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:30,503 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1701651812, now seen corresponding path program 1 times [2022-11-20 11:44:30,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:30,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445534315] [2022-11-20 11:44:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:30,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:30,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:30,505 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:44:30,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:30,847 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:44:30,847 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 [2022-11-20 11:44:30,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:30,908 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 [2022-11-20 11:44:30,972 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:44:30,973 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 [2022-11-20 11:44:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:44:31,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:31,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:31,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445534315] [2022-11-20 11:44:31,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445534315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:31,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:31,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598910186] [2022-11-20 11:44:31,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:31,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:44:31,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:44:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:44:31,085 INFO L87 Difference]: Start difference. First operand 2299 states and 8383 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:31,462 INFO L93 Difference]: Finished difference Result 2315 states and 8422 transitions. [2022-11-20 11:44:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:44:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 11:44:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:31,470 INFO L225 Difference]: With dead ends: 2315 [2022-11-20 11:44:31,470 INFO L226 Difference]: Without dead ends: 2315 [2022-11-20 11:44:31,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:44:31,471 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:31,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:44:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-11-20 11:44:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2309. [2022-11-20 11:44:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2126 states have (on average 3.952022577610536) internal successors, (8402), 2308 states have internal predecessors, (8402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8402 transitions. [2022-11-20 11:44:31,542 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8402 transitions. Word has length 10 [2022-11-20 11:44:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:31,542 INFO L495 AbstractCegarLoop]: Abstraction has 2309 states and 8402 transitions. [2022-11-20 11:44:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8402 transitions. [2022-11-20 11:44:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:31,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:31,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:31,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:31,744 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1700768622, now seen corresponding path program 1 times [2022-11-20 11:44:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661191278] [2022-11-20 11:44:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:31,745 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 [2022-11-20 11:44:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:31,745 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:31,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:31,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:44:31,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:32,076 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:44:32,076 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 [2022-11-20 11:44:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:32,143 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 [2022-11-20 11:44:32,210 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:44:32,211 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 [2022-11-20 11:44:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:44:32,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:32,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661191278] [2022-11-20 11:44:32,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661191278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:32,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:32,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056980438] [2022-11-20 11:44:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:32,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:44:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:44:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:44:32,314 INFO L87 Difference]: Start difference. First operand 2309 states and 8402 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:32,682 INFO L93 Difference]: Finished difference Result 2312 states and 8415 transitions. [2022-11-20 11:44:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:44:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 11:44:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:32,690 INFO L225 Difference]: With dead ends: 2312 [2022-11-20 11:44:32,690 INFO L226 Difference]: Without dead ends: 2312 [2022-11-20 11:44:32,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:44:32,691 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:32,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:44:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-11-20 11:44:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2302. [2022-11-20 11:44:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2119 states have (on average 3.9598867390278434) internal successors, (8391), 2301 states have internal predecessors, (8391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8391 transitions. [2022-11-20 11:44:32,748 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8391 transitions. Word has length 10 [2022-11-20 11:44:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:32,748 INFO L495 AbstractCegarLoop]: Abstraction has 2302 states and 8391 transitions. [2022-11-20 11:44:32,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8391 transitions. [2022-11-20 11:44:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:32,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:32,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:32,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:32,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:32,959 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1363334493, now seen corresponding path program 1 times [2022-11-20 11:44:32,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:32,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358422292] [2022-11-20 11:44:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:32,960 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 [2022-11-20 11:44:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:32,961 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:32,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:44:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:33,246 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:44:33,246 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 [2022-11-20 11:44:33,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:33,316 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 14 treesize of output 20 [2022-11-20 11:44:33,390 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:44:33,391 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 [2022-11-20 11:44:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:33,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:33,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:33,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358422292] [2022-11-20 11:44:33,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358422292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:33,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:33,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819395160] [2022-11-20 11:44:33,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:33,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:44:33,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:33,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:44:33,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:44:33,557 INFO L87 Difference]: Start difference. First operand 2302 states and 8391 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:33,899 INFO L93 Difference]: Finished difference Result 2320 states and 8445 transitions. [2022-11-20 11:44:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:44:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 11:44:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:33,907 INFO L225 Difference]: With dead ends: 2320 [2022-11-20 11:44:33,907 INFO L226 Difference]: Without dead ends: 2320 [2022-11-20 11:44:33,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:44:33,908 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:33,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-11-20 11:44:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2022-11-20 11:44:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2022-11-20 11:44:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2137 states have (on average 3.951801591015442) internal successors, (8445), 2319 states have internal predecessors, (8445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 8445 transitions. [2022-11-20 11:44:33,953 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 8445 transitions. Word has length 10 [2022-11-20 11:44:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:33,953 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 8445 transitions. [2022-11-20 11:44:33,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 8445 transitions. [2022-11-20 11:44:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:33,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:33,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:33,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:34,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:34,155 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1390862387, now seen corresponding path program 1 times [2022-11-20 11:44:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:34,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125458882] [2022-11-20 11:44:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:34,156 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 [2022-11-20 11:44:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:34,158 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:34,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:44:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:34,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:34,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125458882] [2022-11-20 11:44:34,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125458882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:34,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:34,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:34,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257510757] [2022-11-20 11:44:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:34,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:44:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:34,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:44:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:44:34,354 INFO L87 Difference]: Start difference. First operand 2320 states and 8445 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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) [2022-11-20 11:44:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:34,705 INFO L93 Difference]: Finished difference Result 1721 states and 5898 transitions. [2022-11-20 11:44:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:44:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 [2022-11-20 11:44:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:34,710 INFO L225 Difference]: With dead ends: 1721 [2022-11-20 11:44:34,710 INFO L226 Difference]: Without dead ends: 1717 [2022-11-20 11:44:34,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:44:34,711 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:44:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-11-20 11:44:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1717. [2022-11-20 11:44:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1614 states have (on average 3.6493184634448577) internal successors, (5890), 1716 states have internal predecessors, (5890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5890 transitions. [2022-11-20 11:44:34,744 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5890 transitions. Word has length 10 [2022-11-20 11:44:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:34,745 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 5890 transitions. [2022-11-20 11:44:34,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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) [2022-11-20 11:44:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5890 transitions. [2022-11-20 11:44:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:34,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:34,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:34,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:34,959 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1759196262, now seen corresponding path program 1 times [2022-11-20 11:44:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123967781] [2022-11-20 11:44:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:34,960 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 [2022-11-20 11:44:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:34,961 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:34,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:44:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:35,326 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:44:35,327 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 [2022-11-20 11:44:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:35,390 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 [2022-11-20 11:44:35,474 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:44:35,475 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 [2022-11-20 11:44:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:44:35,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:35,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:35,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123967781] [2022-11-20 11:44:35,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123967781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:35,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:35,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823205539] [2022-11-20 11:44:35,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:44:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:44:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:44:35,572 INFO L87 Difference]: Start difference. First operand 1717 states and 5890 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:35,974 INFO L93 Difference]: Finished difference Result 1715 states and 5884 transitions. [2022-11-20 11:44:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:44:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 11:44:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:35,979 INFO L225 Difference]: With dead ends: 1715 [2022-11-20 11:44:35,979 INFO L226 Difference]: Without dead ends: 1715 [2022-11-20 11:44:35,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:44:35,980 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:35,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-20 11:44:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-20 11:44:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1707. [2022-11-20 11:44:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1604 states have (on average 3.658354114713217) internal successors, (5868), 1706 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 5868 transitions. [2022-11-20 11:44:36,011 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 5868 transitions. Word has length 10 [2022-11-20 11:44:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:36,011 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 5868 transitions. [2022-11-20 11:44:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 5868 transitions. [2022-11-20 11:44:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:36,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:36,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:36,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:36,213 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1328550341, now seen corresponding path program 1 times [2022-11-20 11:44:36,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:36,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062189974] [2022-11-20 11:44:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:36,214 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 [2022-11-20 11:44:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:36,215 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:36,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:44:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:36,537 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:44:36,537 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 [2022-11-20 11:44:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:36,609 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 [2022-11-20 11:44:36,680 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:44:36,681 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 [2022-11-20 11:44:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:44:36,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:36,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062189974] [2022-11-20 11:44:36,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062189974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:36,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:36,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263486824] [2022-11-20 11:44:36,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:44:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:44:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:44:36,794 INFO L87 Difference]: Start difference. First operand 1707 states and 5868 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:37,194 INFO L93 Difference]: Finished difference Result 1721 states and 5904 transitions. [2022-11-20 11:44:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:44:37,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 11:44:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:37,200 INFO L225 Difference]: With dead ends: 1721 [2022-11-20 11:44:37,200 INFO L226 Difference]: Without dead ends: 1721 [2022-11-20 11:44:37,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:44:37,201 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:37,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:44:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-20 11:44:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1714. [2022-11-20 11:44:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1611 states have (on average 3.649906890130354) internal successors, (5880), 1713 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5880 transitions. [2022-11-20 11:44:37,232 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5880 transitions. Word has length 10 [2022-11-20 11:44:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:37,232 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 5880 transitions. [2022-11-20 11:44:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5880 transitions. [2022-11-20 11:44:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:37,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:37,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:37,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:37,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:37,433 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1327667151, now seen corresponding path program 1 times [2022-11-20 11:44:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899233273] [2022-11-20 11:44:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:37,434 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 [2022-11-20 11:44:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:37,435 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:37,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:37,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:44:37,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:37,795 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:44:37,796 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 [2022-11-20 11:44:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:44:37,857 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 [2022-11-20 11:44:37,944 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:44:37,944 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 [2022-11-20 11:44:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:44:38,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:44:38,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:38,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899233273] [2022-11-20 11:44:38,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899233273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:38,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:38,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:38,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853836936] [2022-11-20 11:44:38,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:38,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:44:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:44:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:44:38,049 INFO L87 Difference]: Start difference. First operand 1714 states and 5880 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:38,445 INFO L93 Difference]: Finished difference Result 1716 states and 5888 transitions. [2022-11-20 11:44:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:44:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 [2022-11-20 11:44:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:38,450 INFO L225 Difference]: With dead ends: 1716 [2022-11-20 11:44:38,451 INFO L226 Difference]: Without dead ends: 1716 [2022-11-20 11:44:38,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:44:38,451 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:38,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-20 11:44:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-20 11:44:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1704. [2022-11-20 11:44:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1601 states have (on average 3.660836976889444) internal successors, (5861), 1703 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 5861 transitions. [2022-11-20 11:44:38,481 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 5861 transitions. Word has length 10 [2022-11-20 11:44:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:38,481 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 5861 transitions. [2022-11-20 11:44:38,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-11-20 11:44:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 5861 transitions. [2022-11-20 11:44:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:44:38,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:38,482 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-11-20 11:44:38,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:44:38,682 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:44:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1301865736, now seen corresponding path program 1 times [2022-11-20 11:44:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:44:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235877281] [2022-11-20 11:44:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:38,683 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 [2022-11-20 11:44:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:44:38,684 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:44:38,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:44:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:38,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:44:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:38,877 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 [2022-11-20 11:44:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:39,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:42,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:44:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235877281] [2022-11-20 11:44:42,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235877281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:42,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:44:42,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 11:44:42,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770859396] [2022-11-20 11:44:42,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:44:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:44:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:44:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:44:42,046 INFO L87 Difference]: Start difference. First operand 1704 states and 5861 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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) [2022-11-20 11:44:47,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:49,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:51,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:53,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:55,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:57,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:59,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:03,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:05,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:08,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:10,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:12,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:14,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:16,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:27,719 INFO L93 Difference]: Finished difference Result 11229 states and 38072 transitions. [2022-11-20 11:45:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:45:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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 10 [2022-11-20 11:45:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:27,757 INFO L225 Difference]: With dead ends: 11229 [2022-11-20 11:45:27,757 INFO L226 Difference]: Without dead ends: 11229 [2022-11-20 11:45:27,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:45:27,758 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1925 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 214 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:27,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1925 Valid, 0 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2870 Invalid, 12 Unknown, 0 Unchecked, 39.1s Time] [2022-11-20 11:45:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11229 states. [2022-11-20 11:45:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11229 to 1740. [2022-11-20 11:45:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1637 states have (on average 3.6218692730604767) internal successors, (5929), 1739 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 5929 transitions. [2022-11-20 11:45:27,848 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 5929 transitions. Word has length 10 [2022-11-20 11:45:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 5929 transitions. [2022-11-20 11:45:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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) [2022-11-20 11:45:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 5929 transitions. [2022-11-20 11:45:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:45:27,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:27,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:27,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:28,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:45:28,058 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:45:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1735728522, now seen corresponding path program 1 times [2022-11-20 11:45:28,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:45:28,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22006144] [2022-11-20 11:45:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:28,059 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 [2022-11-20 11:45:28,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:45:28,060 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:45:28,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:45:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:28,515 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:45:28,515 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 [2022-11-20 11:45:28,732 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:45:28,733 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 50 [2022-11-20 11:45:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:45:28,957 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 [2022-11-20 11:45:28,988 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:45:28,989 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 [2022-11-20 11:45:29,087 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:45:29,088 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 [2022-11-20 11:45:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:29,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:33,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:45:33,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22006144] [2022-11-20 11:45:33,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22006144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:33,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:45:33,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:45:33,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312827057] [2022-11-20 11:45:33,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:33,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:45:33,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:45:33,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:45:33,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:45:33,668 INFO L87 Difference]: Start difference. First operand 1740 states and 5929 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 11:45:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:35,750 INFO L93 Difference]: Finished difference Result 1753 states and 5954 transitions. [2022-11-20 11:45:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:45:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:45:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:35,755 INFO L225 Difference]: With dead ends: 1753 [2022-11-20 11:45:35,756 INFO L226 Difference]: Without dead ends: 1753 [2022-11-20 11:45:35,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:45:35,759 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:35,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 193 Unchecked, 1.0s Time] [2022-11-20 11:45:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-20 11:45:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1747. [2022-11-20 11:45:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1644 states have (on average 3.6155717761557176) internal successors, (5944), 1746 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5944 transitions. [2022-11-20 11:45:35,792 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5944 transitions. Word has length 10 [2022-11-20 11:45:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:35,793 INFO L495 AbstractCegarLoop]: Abstraction has 1747 states and 5944 transitions. [2022-11-20 11:45:35,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 11:45:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5944 transitions. [2022-11-20 11:45:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:45:35,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:35,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:35,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:35,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:45:35,995 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:45:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1313045783, now seen corresponding path program 1 times [2022-11-20 11:45:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:45:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267977626] [2022-11-20 11:45:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:35,996 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 [2022-11-20 11:45:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:45:35,997 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:45:35,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:45:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:36,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:45:36,451 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 [2022-11-20 11:45:36,669 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:45:36,669 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 [2022-11-20 11:45:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:45:36,893 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 [2022-11-20 11:45:36,940 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:45:36,940 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 [2022-11-20 11:45:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:45:37,023 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 [2022-11-20 11:45:37,047 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:45:37,047 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 [2022-11-20 11:45:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:37,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:49,025 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:45:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:49,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:45:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267977626] [2022-11-20 11:45:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267977626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:49,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:45:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:45:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860375778] [2022-11-20 11:45:49,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:49,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:45:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:45:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:45:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:45:49,027 INFO L87 Difference]: Start difference. First operand 1747 states and 5944 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) 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) [2022-11-20 11:45:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:49,487 INFO L93 Difference]: Finished difference Result 1751 states and 5959 transitions. [2022-11-20 11:45:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:45:49,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) 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 10 [2022-11-20 11:45:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:49,494 INFO L225 Difference]: With dead ends: 1751 [2022-11-20 11:45:49,495 INFO L226 Difference]: Without dead ends: 1751 [2022-11-20 11:45:49,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:45:49,496 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:49,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-11-20 11:45:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-11-20 11:45:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1751. [2022-11-20 11:45:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1648 states have (on average 3.6158980582524274) internal successors, (5959), 1750 states have internal predecessors, (5959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5959 transitions. [2022-11-20 11:45:49,556 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5959 transitions. Word has length 10 [2022-11-20 11:45:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:49,557 INFO L495 AbstractCegarLoop]: Abstraction has 1751 states and 5959 transitions. [2022-11-20 11:45:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) 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) [2022-11-20 11:45:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5959 transitions. [2022-11-20 11:45:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:45:49,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:49,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:49,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:49,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:45:49,758 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:45:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1312162718, now seen corresponding path program 1 times [2022-11-20 11:45:49,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:45:49,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498748700] [2022-11-20 11:45:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:49,759 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 [2022-11-20 11:45:49,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:45:49,760 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:45:49,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:45:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:45:49,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:45:49,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:45:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498748700] [2022-11-20 11:45:49,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498748700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:49,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:49,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:45:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871752495] [2022-11-20 11:45:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:49,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:45:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:49,971 INFO L87 Difference]: Start difference. First operand 1751 states and 5959 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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) [2022-11-20 11:45:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:50,534 INFO L93 Difference]: Finished difference Result 1455 states and 4678 transitions. [2022-11-20 11:45:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 [2022-11-20 11:45:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:50,538 INFO L225 Difference]: With dead ends: 1455 [2022-11-20 11:45:50,538 INFO L226 Difference]: Without dead ends: 1455 [2022-11-20 11:45:50,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:50,539 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:50,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:45:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-11-20 11:45:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2022-11-20 11:45:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1350 states have (on average 3.4651851851851854) internal successors, (4678), 1454 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4678 transitions. [2022-11-20 11:45:50,565 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4678 transitions. Word has length 10 [2022-11-20 11:45:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:50,565 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 4678 transitions. [2022-11-20 11:45:50,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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) [2022-11-20 11:45:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4678 transitions. [2022-11-20 11:45:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:45:50,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:50,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:50,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:50,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:45:50,767 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:45:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash -746087773, now seen corresponding path program 1 times [2022-11-20 11:45:50,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:45:50,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256175186] [2022-11-20 11:45:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:50,768 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 [2022-11-20 11:45:50,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:45:50,768 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:45:50,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:45:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:45:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:51,286 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:45:51,287 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 [2022-11-20 11:45:51,514 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:45:51,515 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 [2022-11-20 11:45:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:45:51,733 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 [2022-11-20 11:45:51,782 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:45:51,783 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 [2022-11-20 11:45:52,155 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-20 11:45:52,156 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 23 treesize of output 36 [2022-11-20 11:45:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:53,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:02,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256175186] [2022-11-20 11:46:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256175186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:02,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:46:02,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:46:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252751734] [2022-11-20 11:46:02,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:02,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:46:02,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:02,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:46:02,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:02,681 INFO L87 Difference]: Start difference. First operand 1455 states and 4678 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 11:46:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:03,253 INFO L93 Difference]: Finished difference Result 1471 states and 4710 transitions. [2022-11-20 11:46:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:46:03,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:46:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:03,258 INFO L225 Difference]: With dead ends: 1471 [2022-11-20 11:46:03,258 INFO L226 Difference]: Without dead ends: 1471 [2022-11-20 11:46:03,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:46:03,259 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:03,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 284 Unchecked, 0.6s Time] [2022-11-20 11:46:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-11-20 11:46:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1463. [2022-11-20 11:46:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1358 states have (on average 3.4572901325478647) internal successors, (4695), 1462 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4695 transitions. [2022-11-20 11:46:03,284 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4695 transitions. Word has length 10 [2022-11-20 11:46:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:03,285 INFO L495 AbstractCegarLoop]: Abstraction has 1463 states and 4695 transitions. [2022-11-20 11:46:03,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 11:46:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4695 transitions. [2022-11-20 11:46:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:46:03,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:03,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:03,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-20 11:46:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:03,489 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash -746087925, now seen corresponding path program 1 times [2022-11-20 11:46:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925386002] [2022-11-20 11:46:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:03,491 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 [2022-11-20 11:46:03,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:03,492 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:03,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:03,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:46:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:04,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:46:04,042 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 [2022-11-20 11:46:04,271 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:04,271 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 [2022-11-20 11:46:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:04,478 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 [2022-11-20 11:46:04,495 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:46:04,496 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 [2022-11-20 11:46:04,626 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:46:04,627 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 [2022-11-20 11:46:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:05,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:08,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:08,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925386002] [2022-11-20 11:46:08,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925386002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:08,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:46:08,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 11:46:08,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367494065] [2022-11-20 11:46:08,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:08,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:46:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:46:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:46:08,267 INFO L87 Difference]: Start difference. First operand 1463 states and 4695 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2022-11-20 11:46:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:09,016 INFO L93 Difference]: Finished difference Result 1483 states and 4731 transitions. [2022-11-20 11:46:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:46:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:46:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:09,020 INFO L225 Difference]: With dead ends: 1483 [2022-11-20 11:46:09,021 INFO L226 Difference]: Without dead ends: 1483 [2022-11-20 11:46:09,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:46:09,023 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:09,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 146 Unchecked, 0.7s Time] [2022-11-20 11:46:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2022-11-20 11:46:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1466. [2022-11-20 11:46:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1361 states have (on average 3.4540778839088904) internal successors, (4701), 1465 states have internal predecessors, (4701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 4701 transitions. [2022-11-20 11:46:09,055 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 4701 transitions. Word has length 10 [2022-11-20 11:46:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:09,055 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 4701 transitions. [2022-11-20 11:46:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2022-11-20 11:46:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 4701 transitions. [2022-11-20 11:46:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:46:09,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:09,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:09,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:09,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:09,257 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash -707144023, now seen corresponding path program 1 times [2022-11-20 11:46:09,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:09,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969356218] [2022-11-20 11:46:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:09,258 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 [2022-11-20 11:46:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:09,259 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:09,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:46:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:09,782 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:46:09,782 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 [2022-11-20 11:46:09,998 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:09,998 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 [2022-11-20 11:46:10,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:10,191 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 [2022-11-20 11:46:10,234 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:46:10,234 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 [2022-11-20 11:46:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:10,342 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 [2022-11-20 11:46:10,360 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:46:10,360 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 [2022-11-20 11:46:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:10,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:16,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969356218] [2022-11-20 11:46:16,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969356218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:16,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:46:16,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:46:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586018550] [2022-11-20 11:46:16,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:16,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:46:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:46:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:16,372 INFO L87 Difference]: Start difference. First operand 1466 states and 4701 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) 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) [2022-11-20 11:46:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:16,948 INFO L93 Difference]: Finished difference Result 1484 states and 4731 transitions. [2022-11-20 11:46:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:46:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) 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 10 [2022-11-20 11:46:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:16,952 INFO L225 Difference]: With dead ends: 1484 [2022-11-20 11:46:16,953 INFO L226 Difference]: Without dead ends: 1484 [2022-11-20 11:46:16,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:16,953 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:16,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 170 Unchecked, 0.6s Time] [2022-11-20 11:46:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-11-20 11:46:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1473. [2022-11-20 11:46:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1368 states have (on average 3.448830409356725) internal successors, (4718), 1472 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 4718 transitions. [2022-11-20 11:46:16,978 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 4718 transitions. Word has length 10 [2022-11-20 11:46:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:16,979 INFO L495 AbstractCegarLoop]: Abstraction has 1473 states and 4718 transitions. [2022-11-20 11:46:16,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) 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) [2022-11-20 11:46:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 4718 transitions. [2022-11-20 11:46:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:46:16,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:16,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:16,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:17,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:17,180 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -745587625, now seen corresponding path program 2 times [2022-11-20 11:46:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:17,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959748152] [2022-11-20 11:46:17,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:17,181 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 [2022-11-20 11:46:17,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:17,182 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:17,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:17,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:17,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:46:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:17,607 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:46:17,608 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 [2022-11-20 11:46:17,832 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:17,833 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 [2022-11-20 11:46:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:17,967 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 [2022-11-20 11:46:18,011 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:46:18,012 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 [2022-11-20 11:46:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:18,069 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 [2022-11-20 11:46:18,092 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:46:18,092 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 [2022-11-20 11:46:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:46:18,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:18,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959748152] [2022-11-20 11:46:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959748152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:18,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:18,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605387038] [2022-11-20 11:46:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:18,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:46:18,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:46:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:18,175 INFO L87 Difference]: Start difference. First operand 1473 states and 4718 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:18,712 INFO L93 Difference]: Finished difference Result 1199 states and 3773 transitions. [2022-11-20 11:46:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:46:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:46:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:18,715 INFO L225 Difference]: With dead ends: 1199 [2022-11-20 11:46:18,715 INFO L226 Difference]: Without dead ends: 1199 [2022-11-20 11:46:18,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:18,716 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:18,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:46:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-20 11:46:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 723. [2022-11-20 11:46:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 673 states have (on average 3.1203566121842496) internal successors, (2100), 722 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2100 transitions. [2022-11-20 11:46:18,729 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2100 transitions. Word has length 10 [2022-11-20 11:46:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:18,729 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 2100 transitions. [2022-11-20 11:46:18,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2100 transitions. [2022-11-20 11:46:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:18,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:18,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:18,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:18,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:18,942 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1211602284, now seen corresponding path program 1 times [2022-11-20 11:46:18,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:18,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165521124] [2022-11-20 11:46:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:18,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:18,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:18,944 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:18,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:46:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:19,290 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:46:19,290 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 [2022-11-20 11:46:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:19,351 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 [2022-11-20 11:46:19,407 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:46:19,408 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 [2022-11-20 11:46:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:19,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:19,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165521124] [2022-11-20 11:46:19,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165521124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:19,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:19,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:19,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365328430] [2022-11-20 11:46:19,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:19,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:19,575 INFO L87 Difference]: Start difference. First operand 723 states and 2100 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:19,994 INFO L93 Difference]: Finished difference Result 741 states and 2138 transitions. [2022-11-20 11:46:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:19,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:19,996 INFO L225 Difference]: With dead ends: 741 [2022-11-20 11:46:19,996 INFO L226 Difference]: Without dead ends: 741 [2022-11-20 11:46:19,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:19,997 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:19,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-20 11:46:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-20 11:46:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 723. [2022-11-20 11:46:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 673 states have (on average 3.1203566121842496) internal successors, (2100), 722 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2100 transitions. [2022-11-20 11:46:20,008 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2100 transitions. Word has length 11 [2022-11-20 11:46:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 2100 transitions. [2022-11-20 11:46:20,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2100 transitions. [2022-11-20 11:46:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:20,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:20,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:20,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:20,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:20,209 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:20,210 INFO L85 PathProgramCache]: Analyzing trace with hash 167059502, now seen corresponding path program 1 times [2022-11-20 11:46:20,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:20,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728102634] [2022-11-20 11:46:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:20,210 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 [2022-11-20 11:46:20,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:20,211 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:20,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:46:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:20,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:20,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728102634] [2022-11-20 11:46:20,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728102634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:20,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:20,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998281015] [2022-11-20 11:46:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:20,464 INFO L87 Difference]: Start difference. First operand 723 states and 2100 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:20,989 INFO L93 Difference]: Finished difference Result 655 states and 1760 transitions. [2022-11-20 11:46:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:20,991 INFO L225 Difference]: With dead ends: 655 [2022-11-20 11:46:20,991 INFO L226 Difference]: Without dead ends: 626 [2022-11-20 11:46:20,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:20,991 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:20,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:46:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-20 11:46:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 618. [2022-11-20 11:46:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 567 states have (on average 2.9576719576719577) internal successors, (1677), 617 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1677 transitions. [2022-11-20 11:46:20,999 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1677 transitions. Word has length 11 [2022-11-20 11:46:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:21,000 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 1677 transitions. [2022-11-20 11:46:21,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1677 transitions. [2022-11-20 11:46:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:21,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:21,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:21,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:21,203 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1300377580, now seen corresponding path program 1 times [2022-11-20 11:46:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464176684] [2022-11-20 11:46:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:21,204 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 [2022-11-20 11:46:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:21,205 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:21,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:21,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:21,593 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:46:21,593 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 [2022-11-20 11:46:21,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:21,653 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 [2022-11-20 11:46:21,750 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:46:21,751 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 [2022-11-20 11:46:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:21,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:21,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:21,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464176684] [2022-11-20 11:46:21,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464176684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:21,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:21,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837416192] [2022-11-20 11:46:21,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:21,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:21,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:21,867 INFO L87 Difference]: Start difference. First operand 618 states and 1677 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:22,243 INFO L93 Difference]: Finished difference Result 616 states and 1671 transitions. [2022-11-20 11:46:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:22,246 INFO L225 Difference]: With dead ends: 616 [2022-11-20 11:46:22,246 INFO L226 Difference]: Without dead ends: 616 [2022-11-20 11:46:22,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:22,246 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:22,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-20 11:46:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-20 11:46:22,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 610. [2022-11-20 11:46:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 559 states have (on average 2.966010733452594) internal successors, (1658), 609 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1658 transitions. [2022-11-20 11:46:22,255 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1658 transitions. Word has length 11 [2022-11-20 11:46:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:22,255 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 1658 transitions. [2022-11-20 11:46:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1658 transitions. [2022-11-20 11:46:22,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:22,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:22,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:22,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:22,456 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1299494390, now seen corresponding path program 1 times [2022-11-20 11:46:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:22,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574675863] [2022-11-20 11:46:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:22,457 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 [2022-11-20 11:46:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:22,458 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:22,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:22,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:46:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:22,861 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:46:22,862 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 [2022-11-20 11:46:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:22,924 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 [2022-11-20 11:46:22,993 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:46:22,994 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 [2022-11-20 11:46:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:23,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:23,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:23,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574675863] [2022-11-20 11:46:23,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574675863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:23,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:23,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:23,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37157001] [2022-11-20 11:46:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:23,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:23,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:23,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:23,112 INFO L87 Difference]: Start difference. First operand 610 states and 1658 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:23,500 INFO L93 Difference]: Finished difference Result 608 states and 1654 transitions. [2022-11-20 11:46:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:23,502 INFO L225 Difference]: With dead ends: 608 [2022-11-20 11:46:23,502 INFO L226 Difference]: Without dead ends: 608 [2022-11-20 11:46:23,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:23,502 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:23,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-20 11:46:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-20 11:46:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 598. [2022-11-20 11:46:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 547 states have (on average 2.9908592321755028) internal successors, (1636), 597 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1636 transitions. [2022-11-20 11:46:23,511 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1636 transitions. Word has length 11 [2022-11-20 11:46:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:23,511 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 1636 transitions. [2022-11-20 11:46:23,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1636 transitions. [2022-11-20 11:46:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:23,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:23,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:23,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:23,716 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1764608725, now seen corresponding path program 1 times [2022-11-20 11:46:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:23,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014507225] [2022-11-20 11:46:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:23,717 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 [2022-11-20 11:46:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:23,718 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:23,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:24,151 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:46:24,152 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 [2022-11-20 11:46:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:24,215 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 [2022-11-20 11:46:24,286 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:46:24,286 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 [2022-11-20 11:46:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:24,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:24,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014507225] [2022-11-20 11:46:24,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014507225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:24,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:24,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099134802] [2022-11-20 11:46:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:24,398 INFO L87 Difference]: Start difference. First operand 598 states and 1636 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:24,764 INFO L93 Difference]: Finished difference Result 625 states and 1693 transitions. [2022-11-20 11:46:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:24,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:24,766 INFO L225 Difference]: With dead ends: 625 [2022-11-20 11:46:24,766 INFO L226 Difference]: Without dead ends: 616 [2022-11-20 11:46:24,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:24,767 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:24,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-20 11:46:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-20 11:46:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 598. [2022-11-20 11:46:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 547 states have (on average 2.989031078610603) internal successors, (1635), 597 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1635 transitions. [2022-11-20 11:46:24,776 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1635 transitions. Word has length 11 [2022-11-20 11:46:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:24,776 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 1635 transitions. [2022-11-20 11:46:24,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1635 transitions. [2022-11-20 11:46:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:24,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:24,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:24,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:46:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:24,978 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2049717025, now seen corresponding path program 1 times [2022-11-20 11:46:24,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719244636] [2022-11-20 11:46:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:24,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:24,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:24,979 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:24,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:25,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:46:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:25,395 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:25,395 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 [2022-11-20 11:46:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:25,472 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 18 treesize of output 24 [2022-11-20 11:46:25,576 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:25,577 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 [2022-11-20 11:46:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:25,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:25,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719244636] [2022-11-20 11:46:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719244636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:25,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:25,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:25,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990294442] [2022-11-20 11:46:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:25,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:25,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:25,882 INFO L87 Difference]: Start difference. First operand 598 states and 1635 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:26,255 INFO L93 Difference]: Finished difference Result 610 states and 1661 transitions. [2022-11-20 11:46:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:26,258 INFO L225 Difference]: With dead ends: 610 [2022-11-20 11:46:26,258 INFO L226 Difference]: Without dead ends: 610 [2022-11-20 11:46:26,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:26,258 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:26,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-20 11:46:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-11-20 11:46:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2022-11-20 11:46:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 555 states have (on average 2.981981981981982) internal successors, (1655), 605 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1655 transitions. [2022-11-20 11:46:26,272 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1655 transitions. Word has length 11 [2022-11-20 11:46:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:26,272 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 1655 transitions. [2022-11-20 11:46:26,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:26,273 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1655 transitions. [2022-11-20 11:46:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:26,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:26,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:26,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:46:26,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:26,488 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2049711538, now seen corresponding path program 1 times [2022-11-20 11:46:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786539125] [2022-11-20 11:46:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:26,489 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 [2022-11-20 11:46:26,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:26,490 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:26,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:46:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:26,927 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:26,927 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 [2022-11-20 11:46:27,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:27,001 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 [2022-11-20 11:46:27,091 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:27,091 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 [2022-11-20 11:46:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:27,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:27,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:27,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786539125] [2022-11-20 11:46:27,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786539125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:27,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:27,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641832828] [2022-11-20 11:46:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:27,441 INFO L87 Difference]: Start difference. First operand 606 states and 1655 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:27,790 INFO L93 Difference]: Finished difference Result 611 states and 1663 transitions. [2022-11-20 11:46:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:27,792 INFO L225 Difference]: With dead ends: 611 [2022-11-20 11:46:27,792 INFO L226 Difference]: Without dead ends: 611 [2022-11-20 11:46:27,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:27,792 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:27,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-20 11:46:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-20 11:46:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 607. [2022-11-20 11:46:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 556 states have (on average 2.9802158273381294) internal successors, (1657), 606 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1657 transitions. [2022-11-20 11:46:27,804 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1657 transitions. Word has length 11 [2022-11-20 11:46:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:27,804 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 1657 transitions. [2022-11-20 11:46:27,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1657 transitions. [2022-11-20 11:46:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:27,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:27,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:27,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:28,005 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2049650065, now seen corresponding path program 2 times [2022-11-20 11:46:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:28,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413786455] [2022-11-20 11:46:28,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:28,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:28,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:28,007 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:28,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:28,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:28,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:28,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:28,377 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:28,378 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 [2022-11-20 11:46:28,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:28,450 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 [2022-11-20 11:46:28,525 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:28,525 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 [2022-11-20 11:46:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:28,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:28,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413786455] [2022-11-20 11:46:28,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413786455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:28,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:28,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721853903] [2022-11-20 11:46:28,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:28,819 INFO L87 Difference]: Start difference. First operand 607 states and 1657 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:29,195 INFO L93 Difference]: Finished difference Result 611 states and 1662 transitions. [2022-11-20 11:46:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:29,198 INFO L225 Difference]: With dead ends: 611 [2022-11-20 11:46:29,198 INFO L226 Difference]: Without dead ends: 611 [2022-11-20 11:46:29,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:29,199 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:29,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 11:46:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-20 11:46:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 608. [2022-11-20 11:46:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 557 states have (on average 2.976660682226212) internal successors, (1658), 607 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1658 transitions. [2022-11-20 11:46:29,208 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1658 transitions. Word has length 11 [2022-11-20 11:46:29,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:29,208 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 1658 transitions. [2022-11-20 11:46:29,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1658 transitions. [2022-11-20 11:46:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:29,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:29,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:29,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:29,425 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2049479968, now seen corresponding path program 2 times [2022-11-20 11:46:29,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:29,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793724858] [2022-11-20 11:46:29,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:29,426 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 [2022-11-20 11:46:29,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:29,427 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:29,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:29,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:29,864 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:29,865 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 [2022-11-20 11:46:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:29,956 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 [2022-11-20 11:46:30,059 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:30,060 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 [2022-11-20 11:46:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:30,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:30,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793724858] [2022-11-20 11:46:30,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793724858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:30,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:30,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707516313] [2022-11-20 11:46:30,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:30,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:30,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:30,313 INFO L87 Difference]: Start difference. First operand 608 states and 1658 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:30,650 INFO L93 Difference]: Finished difference Result 612 states and 1663 transitions. [2022-11-20 11:46:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:30,653 INFO L225 Difference]: With dead ends: 612 [2022-11-20 11:46:30,653 INFO L226 Difference]: Without dead ends: 612 [2022-11-20 11:46:30,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:30,653 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:30,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-20 11:46:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-20 11:46:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 609. [2022-11-20 11:46:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 558 states have (on average 2.9731182795698925) internal successors, (1659), 608 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1659 transitions. [2022-11-20 11:46:30,665 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1659 transitions. Word has length 11 [2022-11-20 11:46:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:30,665 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1659 transitions. [2022-11-20 11:46:30,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1659 transitions. [2022-11-20 11:46:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:30,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:30,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:30,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:30,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:30,866 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2054234035, now seen corresponding path program 3 times [2022-11-20 11:46:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:30,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901264416] [2022-11-20 11:46:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:30,867 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 [2022-11-20 11:46:30,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:30,868 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:30,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:31,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:46:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:31,273 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:31,273 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 [2022-11-20 11:46:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:31,352 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 [2022-11-20 11:46:31,445 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:31,446 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 [2022-11-20 11:46:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:31,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:31,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901264416] [2022-11-20 11:46:31,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901264416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:31,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:31,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327077697] [2022-11-20 11:46:31,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:31,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:31,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:31,682 INFO L87 Difference]: Start difference. First operand 609 states and 1659 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:32,060 INFO L93 Difference]: Finished difference Result 851 states and 2457 transitions. [2022-11-20 11:46:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:32,064 INFO L225 Difference]: With dead ends: 851 [2022-11-20 11:46:32,064 INFO L226 Difference]: Without dead ends: 851 [2022-11-20 11:46:32,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:32,065 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:32,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-11-20 11:46:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-20 11:46:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 621. [2022-11-20 11:46:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 570 states have (on average 2.950877192982456) internal successors, (1682), 620 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1682 transitions. [2022-11-20 11:46:32,082 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1682 transitions. Word has length 11 [2022-11-20 11:46:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:32,083 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 1682 transitions. [2022-11-20 11:46:32,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1682 transitions. [2022-11-20 11:46:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:32,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:32,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:32,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:32,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:32,299 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2048961028, now seen corresponding path program 3 times [2022-11-20 11:46:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:32,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861763480] [2022-11-20 11:46:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:32,299 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 [2022-11-20 11:46:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:32,300 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:32,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:46:32,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:46:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:32,689 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:32,689 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 [2022-11-20 11:46:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:32,760 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 [2022-11-20 11:46:32,859 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:32,859 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 [2022-11-20 11:46:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:33,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:33,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:33,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861763480] [2022-11-20 11:46:33,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861763480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:33,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:33,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:33,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141649051] [2022-11-20 11:46:33,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:33,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:33,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:33,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:33,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:33,080 INFO L87 Difference]: Start difference. First operand 621 states and 1682 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:33,426 INFO L93 Difference]: Finished difference Result 624 states and 1686 transitions. [2022-11-20 11:46:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:33,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2022-11-20 11:46:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:33,428 INFO L225 Difference]: With dead ends: 624 [2022-11-20 11:46:33,428 INFO L226 Difference]: Without dead ends: 624 [2022-11-20 11:46:33,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:33,429 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:33,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:46:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-20 11:46:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 622. [2022-11-20 11:46:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 571 states have (on average 2.947460595446585) internal successors, (1683), 621 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1683 transitions. [2022-11-20 11:46:33,437 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1683 transitions. Word has length 11 [2022-11-20 11:46:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:33,437 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 1683 transitions. [2022-11-20 11:46:33,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1683 transitions. [2022-11-20 11:46:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:33,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:33,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:33,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:33,639 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1657002980, now seen corresponding path program 1 times [2022-11-20 11:46:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281934496] [2022-11-20 11:46:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:33,639 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 [2022-11-20 11:46:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:33,650 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:33,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:34,062 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:46:34,062 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 [2022-11-20 11:46:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:34,123 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 14 treesize of output 20 [2022-11-20 11:46:34,202 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:46:34,202 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 [2022-11-20 11:46:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:34,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:34,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:34,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281934496] [2022-11-20 11:46:34,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281934496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:34,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:34,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416456475] [2022-11-20 11:46:34,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:34,324 INFO L87 Difference]: Start difference. First operand 622 states and 1683 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-20 11:46:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:34,677 INFO L93 Difference]: Finished difference Result 620 states and 1679 transitions. [2022-11-20 11:46:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:34,679 INFO L225 Difference]: With dead ends: 620 [2022-11-20 11:46:34,679 INFO L226 Difference]: Without dead ends: 611 [2022-11-20 11:46:34,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:34,680 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:34,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-20 11:46:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-20 11:46:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 581. [2022-11-20 11:46:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 531 states have (on average 3.016949152542373) internal successors, (1602), 580 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1602 transitions. [2022-11-20 11:46:34,692 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1602 transitions. Word has length 12 [2022-11-20 11:46:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:34,692 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 1602 transitions. [2022-11-20 11:46:34,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-20 11:46:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1602 transitions. [2022-11-20 11:46:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:34,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:34,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:34,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:34,895 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash 358003518, now seen corresponding path program 1 times [2022-11-20 11:46:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374042902] [2022-11-20 11:46:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:34,896 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 [2022-11-20 11:46:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:34,897 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:34,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:46:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:35,377 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:35,377 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 [2022-11-20 11:46:35,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:35,450 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 [2022-11-20 11:46:35,536 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:35,536 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 [2022-11-20 11:46:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:35,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:35,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:35,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374042902] [2022-11-20 11:46:35,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374042902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:35,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:35,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019052052] [2022-11-20 11:46:35,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:35,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:35,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:35,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:35,789 INFO L87 Difference]: Start difference. First operand 581 states and 1602 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:36,104 INFO L93 Difference]: Finished difference Result 615 states and 1663 transitions. [2022-11-20 11:46:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:36,106 INFO L225 Difference]: With dead ends: 615 [2022-11-20 11:46:36,106 INFO L226 Difference]: Without dead ends: 615 [2022-11-20 11:46:36,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:36,106 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:36,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-20 11:46:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-20 11:46:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 598. [2022-11-20 11:46:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 548 states have (on average 2.9945255474452557) internal successors, (1641), 597 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1641 transitions. [2022-11-20 11:46:36,126 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1641 transitions. Word has length 12 [2022-11-20 11:46:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:36,126 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 1641 transitions. [2022-11-20 11:46:36,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1641 transitions. [2022-11-20 11:46:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:36,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:36,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:36,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-20 11:46:36,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:36,339 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash 358009005, now seen corresponding path program 1 times [2022-11-20 11:46:36,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:36,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562124746] [2022-11-20 11:46:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:36,340 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 [2022-11-20 11:46:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:36,341 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:36,794 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:36,794 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 [2022-11-20 11:46:36,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:36,866 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 [2022-11-20 11:46:36,951 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:36,952 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 [2022-11-20 11:46:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:37,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:37,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:37,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562124746] [2022-11-20 11:46:37,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562124746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:37,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:37,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797992719] [2022-11-20 11:46:37,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:37,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:37,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:37,255 INFO L87 Difference]: Start difference. First operand 598 states and 1641 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:37,606 INFO L93 Difference]: Finished difference Result 616 states and 1664 transitions. [2022-11-20 11:46:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:37,608 INFO L225 Difference]: With dead ends: 616 [2022-11-20 11:46:37,608 INFO L226 Difference]: Without dead ends: 616 [2022-11-20 11:46:37,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:37,608 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:37,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-11-20 11:46:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-20 11:46:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 596. [2022-11-20 11:46:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 546 states have (on average 2.9926739926739927) internal successors, (1634), 595 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1634 transitions. [2022-11-20 11:46:37,617 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1634 transitions. Word has length 12 [2022-11-20 11:46:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:37,618 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 1634 transitions. [2022-11-20 11:46:37,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1634 transitions. [2022-11-20 11:46:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:37,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:37,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:37,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:46:37,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:37,832 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 358070478, now seen corresponding path program 2 times [2022-11-20 11:46:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:37,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302105621] [2022-11-20 11:46:37,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:37,833 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 [2022-11-20 11:46:37,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:37,834 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:37,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:38,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:38,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:38,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:46:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:38,247 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:38,248 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 [2022-11-20 11:46:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:38,319 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 [2022-11-20 11:46:38,398 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:38,398 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 [2022-11-20 11:46:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:38,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:38,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:38,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302105621] [2022-11-20 11:46:38,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302105621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:38,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:38,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:38,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274221570] [2022-11-20 11:46:38,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:38,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:38,661 INFO L87 Difference]: Start difference. First operand 596 states and 1634 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:39,000 INFO L93 Difference]: Finished difference Result 851 states and 2447 transitions. [2022-11-20 11:46:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:39,003 INFO L225 Difference]: With dead ends: 851 [2022-11-20 11:46:39,003 INFO L226 Difference]: Without dead ends: 851 [2022-11-20 11:46:39,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:39,004 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:39,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-11-20 11:46:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-20 11:46:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 595. [2022-11-20 11:46:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 545 states have (on average 2.996330275229358) internal successors, (1633), 594 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1633 transitions. [2022-11-20 11:46:39,017 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1633 transitions. Word has length 12 [2022-11-20 11:46:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:39,018 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 1633 transitions. [2022-11-20 11:46:39,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1633 transitions. [2022-11-20 11:46:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:39,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:39,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:39,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:39,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:39,234 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash 358240575, now seen corresponding path program 2 times [2022-11-20 11:46:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:39,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530866209] [2022-11-20 11:46:39,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:39,235 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 [2022-11-20 11:46:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:39,236 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:39,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:39,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:39,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:39,630 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:39,630 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 [2022-11-20 11:46:39,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:39,703 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 [2022-11-20 11:46:39,780 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:39,780 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 [2022-11-20 11:46:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:40,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:40,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530866209] [2022-11-20 11:46:40,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530866209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:40,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:40,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:40,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89532246] [2022-11-20 11:46:40,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:40,065 INFO L87 Difference]: Start difference. First operand 595 states and 1633 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:40,415 INFO L93 Difference]: Finished difference Result 612 states and 1653 transitions. [2022-11-20 11:46:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:40,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:40,417 INFO L225 Difference]: With dead ends: 612 [2022-11-20 11:46:40,417 INFO L226 Difference]: Without dead ends: 612 [2022-11-20 11:46:40,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:40,418 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:40,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-11-20 11:46:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-20 11:46:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2022-11-20 11:46:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 543 states have (on average 2.998158379373849) internal successors, (1628), 592 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1628 transitions. [2022-11-20 11:46:40,426 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1628 transitions. Word has length 12 [2022-11-20 11:46:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:40,426 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 1628 transitions. [2022-11-20 11:46:40,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1628 transitions. [2022-11-20 11:46:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:40,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:40,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:40,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:40,631 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash 353486508, now seen corresponding path program 3 times [2022-11-20 11:46:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522108678] [2022-11-20 11:46:40,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:40,632 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 [2022-11-20 11:46:40,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:40,633 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:40,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:40,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:46:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:41,043 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:41,043 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 [2022-11-20 11:46:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:41,116 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 [2022-11-20 11:46:41,196 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:41,196 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 [2022-11-20 11:46:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:41,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:41,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522108678] [2022-11-20 11:46:41,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522108678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:41,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:41,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:41,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608684026] [2022-11-20 11:46:41,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:41,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:41,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:41,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:41,452 INFO L87 Difference]: Start difference. First operand 593 states and 1628 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:41,835 INFO L93 Difference]: Finished difference Result 609 states and 1647 transitions. [2022-11-20 11:46:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:41,838 INFO L225 Difference]: With dead ends: 609 [2022-11-20 11:46:41,838 INFO L226 Difference]: Without dead ends: 609 [2022-11-20 11:46:41,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:41,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:41,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-11-20 11:46:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-11-20 11:46:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 595. [2022-11-20 11:46:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 545 states have (on average 2.9908256880733943) internal successors, (1630), 594 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1630 transitions. [2022-11-20 11:46:41,847 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1630 transitions. Word has length 12 [2022-11-20 11:46:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:41,847 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 1630 transitions. [2022-11-20 11:46:41,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1630 transitions. [2022-11-20 11:46:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:41,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:41,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:42,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:42,051 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 358759515, now seen corresponding path program 3 times [2022-11-20 11:46:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:42,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283851317] [2022-11-20 11:46:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:42,052 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 [2022-11-20 11:46:42,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:42,053 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:42,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:42,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:46:42,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:42,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:42,449 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:42,449 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 [2022-11-20 11:46:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:42,529 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 [2022-11-20 11:46:42,663 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:42,663 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 [2022-11-20 11:46:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:42,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:42,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:42,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283851317] [2022-11-20 11:46:42,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283851317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:42,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:42,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:42,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112626408] [2022-11-20 11:46:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:42,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:42,966 INFO L87 Difference]: Start difference. First operand 595 states and 1630 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:43,319 INFO L93 Difference]: Finished difference Result 810 states and 2155 transitions. [2022-11-20 11:46:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:43,322 INFO L225 Difference]: With dead ends: 810 [2022-11-20 11:46:43,322 INFO L226 Difference]: Without dead ends: 810 [2022-11-20 11:46:43,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:43,323 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:43,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2022-11-20 11:46:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-20 11:46:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 606. [2022-11-20 11:46:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 556 states have (on average 2.971223021582734) internal successors, (1652), 605 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1652 transitions. [2022-11-20 11:46:43,334 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1652 transitions. Word has length 12 [2022-11-20 11:46:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:43,334 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 1652 transitions. [2022-11-20 11:46:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1652 transitions. [2022-11-20 11:46:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:43,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:43,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:43,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:46:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:43,536 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash 883298461, now seen corresponding path program 1 times [2022-11-20 11:46:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:43,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298231712] [2022-11-20 11:46:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:43,537 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 [2022-11-20 11:46:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:43,538 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:43,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:43,956 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:43,956 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 [2022-11-20 11:46:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:44,032 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 [2022-11-20 11:46:44,116 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:44,116 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 [2022-11-20 11:46:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:44,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:44,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:44,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298231712] [2022-11-20 11:46:44,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298231712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:44,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:44,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:44,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744220628] [2022-11-20 11:46:44,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:44,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:44,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:44,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:44,417 INFO L87 Difference]: Start difference. First operand 606 states and 1652 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:44,705 INFO L93 Difference]: Finished difference Result 620 states and 1689 transitions. [2022-11-20 11:46:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:44,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:44,707 INFO L225 Difference]: With dead ends: 620 [2022-11-20 11:46:44,708 INFO L226 Difference]: Without dead ends: 620 [2022-11-20 11:46:44,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:44,708 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:44,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-20 11:46:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-11-20 11:46:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 613. [2022-11-20 11:46:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 563 states have (on average 2.97158081705151) internal successors, (1673), 612 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1673 transitions. [2022-11-20 11:46:44,719 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1673 transitions. Word has length 12 [2022-11-20 11:46:44,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:44,719 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 1673 transitions. [2022-11-20 11:46:44,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1673 transitions. [2022-11-20 11:46:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:44,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:44,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:44,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 11:46:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:44,923 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash 883298373, now seen corresponding path program 1 times [2022-11-20 11:46:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567340352] [2022-11-20 11:46:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:44,924 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 [2022-11-20 11:46:44,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:44,925 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:44,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:46:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:45,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:45,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567340352] [2022-11-20 11:46:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567340352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:45,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:45,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088810359] [2022-11-20 11:46:45,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:45,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:46:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:46:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:45,315 INFO L87 Difference]: Start difference. First operand 613 states and 1673 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2022-11-20 11:46:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:46,060 INFO L93 Difference]: Finished difference Result 683 states and 1804 transitions. [2022-11-20 11:46:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:46:46,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:46,062 INFO L225 Difference]: With dead ends: 683 [2022-11-20 11:46:46,062 INFO L226 Difference]: Without dead ends: 611 [2022-11-20 11:46:46,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:46:46,063 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:46,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:46:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-20 11:46:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 599. [2022-11-20 11:46:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 547 states have (on average 2.96526508226691) internal successors, (1622), 598 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1622 transitions. [2022-11-20 11:46:46,072 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1622 transitions. Word has length 12 [2022-11-20 11:46:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:46,072 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 1622 transitions. [2022-11-20 11:46:46,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2022-11-20 11:46:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1622 transitions. [2022-11-20 11:46:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:46,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:46,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:46,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:46:46,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:46,273 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash 883303948, now seen corresponding path program 1 times [2022-11-20 11:46:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647986984] [2022-11-20 11:46:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:46,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:46,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:46,275 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:46,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:46,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:46,744 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:46,744 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 11:46:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:46,832 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 [2022-11-20 11:46:46,909 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:46,909 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 [2022-11-20 11:46:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:47,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:47,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:47,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647986984] [2022-11-20 11:46:47,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647986984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:47,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:47,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:47,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314096583] [2022-11-20 11:46:47,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:47,181 INFO L87 Difference]: Start difference. First operand 599 states and 1622 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:47,535 INFO L93 Difference]: Finished difference Result 607 states and 1632 transitions. [2022-11-20 11:46:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:47,537 INFO L225 Difference]: With dead ends: 607 [2022-11-20 11:46:47,537 INFO L226 Difference]: Without dead ends: 607 [2022-11-20 11:46:47,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:47,538 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:47,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:46:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-20 11:46:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 600. [2022-11-20 11:46:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 548 states have (on average 2.9616788321167884) internal successors, (1623), 599 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1623 transitions. [2022-11-20 11:46:47,547 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1623 transitions. Word has length 12 [2022-11-20 11:46:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:47,547 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 1623 transitions. [2022-11-20 11:46:47,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1623 transitions. [2022-11-20 11:46:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:47,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:47,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:47,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:46:47,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:47,748 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash 883278001, now seen corresponding path program 2 times [2022-11-20 11:46:47,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:47,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838647177] [2022-11-20 11:46:47,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:47,749 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 [2022-11-20 11:46:47,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:47,750 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:47,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:46:48,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:48,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:46:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:48,186 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:48,186 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 [2022-11-20 11:46:48,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:48,260 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 18 treesize of output 24 [2022-11-20 11:46:48,336 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:48,337 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 [2022-11-20 11:46:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:48,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:48,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:48,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838647177] [2022-11-20 11:46:48,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838647177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:48,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:48,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9409348] [2022-11-20 11:46:48,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:48,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:48,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:48,614 INFO L87 Difference]: Start difference. First operand 600 states and 1623 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:48,987 INFO L93 Difference]: Finished difference Result 604 states and 1626 transitions. [2022-11-20 11:46:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:48,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:48,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:48,989 INFO L225 Difference]: With dead ends: 604 [2022-11-20 11:46:48,990 INFO L226 Difference]: Without dead ends: 601 [2022-11-20 11:46:48,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:48,990 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:48,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-11-20 11:46:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-20 11:46:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 600. [2022-11-20 11:46:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 548 states have (on average 2.95985401459854) internal successors, (1622), 599 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1622 transitions. [2022-11-20 11:46:48,999 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1622 transitions. Word has length 12 [2022-11-20 11:46:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:48,999 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 1622 transitions. [2022-11-20 11:46:48,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1622 transitions. [2022-11-20 11:46:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:49,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:49,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:49,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-20 11:46:49,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:49,211 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 883448098, now seen corresponding path program 2 times [2022-11-20 11:46:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:49,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053057744] [2022-11-20 11:46:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:49,212 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 [2022-11-20 11:46:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:49,213 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:49,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 11:46:49,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:49,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:46:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:49,626 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:49,626 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 [2022-11-20 11:46:49,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:49,707 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 [2022-11-20 11:46:49,804 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:49,805 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 [2022-11-20 11:46:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:50,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:50,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:50,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053057744] [2022-11-20 11:46:50,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053057744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:50,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:50,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:50,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502762596] [2022-11-20 11:46:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:50,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:50,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:50,143 INFO L87 Difference]: Start difference. First operand 600 states and 1622 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:50,514 INFO L93 Difference]: Finished difference Result 605 states and 1627 transitions. [2022-11-20 11:46:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:50,516 INFO L225 Difference]: With dead ends: 605 [2022-11-20 11:46:50,517 INFO L226 Difference]: Without dead ends: 605 [2022-11-20 11:46:50,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:50,517 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:50,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-20 11:46:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-20 11:46:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 601. [2022-11-20 11:46:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 549 states have (on average 2.9562841530054644) internal successors, (1623), 600 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1623 transitions. [2022-11-20 11:46:50,525 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1623 transitions. Word has length 12 [2022-11-20 11:46:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:50,525 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 1623 transitions. [2022-11-20 11:46:50,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1623 transitions. [2022-11-20 11:46:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:50,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:50,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:50,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:50,727 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 890626768, now seen corresponding path program 3 times [2022-11-20 11:46:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:50,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024216165] [2022-11-20 11:46:50,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:50,728 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 [2022-11-20 11:46:50,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:50,729 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:50,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 11:46:51,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:46:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:51,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:46:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:51,160 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:51,161 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 [2022-11-20 11:46:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:51,236 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 [2022-11-20 11:46:51,322 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:51,322 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 [2022-11-20 11:46:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:46:51,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:51,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:51,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024216165] [2022-11-20 11:46:51,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024216165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:51,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:51,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819253408] [2022-11-20 11:46:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:51,587 INFO L87 Difference]: Start difference. First operand 601 states and 1623 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:51,993 INFO L93 Difference]: Finished difference Result 605 states and 1627 transitions. [2022-11-20 11:46:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:51,995 INFO L225 Difference]: With dead ends: 605 [2022-11-20 11:46:51,995 INFO L226 Difference]: Without dead ends: 605 [2022-11-20 11:46:51,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:51,995 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:51,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 11:46:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-20 11:46:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 602. [2022-11-20 11:46:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 550 states have (on average 2.9527272727272726) internal successors, (1624), 601 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1624 transitions. [2022-11-20 11:46:52,008 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1624 transitions. Word has length 12 [2022-11-20 11:46:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:52,008 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 1624 transitions. [2022-11-20 11:46:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1624 transitions. [2022-11-20 11:46:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:52,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:52,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:52,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:52,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:52,219 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash -960752769, now seen corresponding path program 1 times [2022-11-20 11:46:52,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:52,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099530464] [2022-11-20 11:46:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:52,220 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 [2022-11-20 11:46:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:52,221 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:52,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 11:46:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:52,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:52,718 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:52,718 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 [2022-11-20 11:46:52,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:52,800 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 [2022-11-20 11:46:52,919 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:52,920 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 [2022-11-20 11:46:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:53,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:53,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:53,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099530464] [2022-11-20 11:46:53,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099530464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:53,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:53,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721018110] [2022-11-20 11:46:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:53,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:53,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:53,161 INFO L87 Difference]: Start difference. First operand 602 states and 1624 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:53,515 INFO L93 Difference]: Finished difference Result 614 states and 1650 transitions. [2022-11-20 11:46:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:53,517 INFO L225 Difference]: With dead ends: 614 [2022-11-20 11:46:53,517 INFO L226 Difference]: Without dead ends: 614 [2022-11-20 11:46:53,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:53,518 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:53,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-11-20 11:46:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-20 11:46:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 610. [2022-11-20 11:46:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 558 states have (on average 2.946236559139785) internal successors, (1644), 609 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1644 transitions. [2022-11-20 11:46:53,527 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1644 transitions. Word has length 12 [2022-11-20 11:46:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:53,527 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 1644 transitions. [2022-11-20 11:46:53,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1644 transitions. [2022-11-20 11:46:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:53,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:53,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:53,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:53,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:53,728 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash -960747282, now seen corresponding path program 1 times [2022-11-20 11:46:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:53,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332382805] [2022-11-20 11:46:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:53,729 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 [2022-11-20 11:46:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:53,730 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:53,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 11:46:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:46:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:54,243 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:54,243 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 [2022-11-20 11:46:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:54,319 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 [2022-11-20 11:46:54,416 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:54,417 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 [2022-11-20 11:46:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:54,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:54,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332382805] [2022-11-20 11:46:54,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332382805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:54,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:54,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38462398] [2022-11-20 11:46:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:54,681 INFO L87 Difference]: Start difference. First operand 610 states and 1644 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:55,107 INFO L93 Difference]: Finished difference Result 616 states and 1653 transitions. [2022-11-20 11:46:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:55,110 INFO L225 Difference]: With dead ends: 616 [2022-11-20 11:46:55,110 INFO L226 Difference]: Without dead ends: 616 [2022-11-20 11:46:55,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:55,111 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:55,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 11:46:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-20 11:46:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 611. [2022-11-20 11:46:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 559 states have (on average 2.9445438282647585) internal successors, (1646), 610 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1646 transitions. [2022-11-20 11:46:55,124 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1646 transitions. Word has length 12 [2022-11-20 11:46:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:55,124 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 1646 transitions. [2022-11-20 11:46:55,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1646 transitions. [2022-11-20 11:46:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:55,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:55,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:55,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:55,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:55,340 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:55,340 INFO L85 PathProgramCache]: Analyzing trace with hash -960685809, now seen corresponding path program 2 times [2022-11-20 11:46:55,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:55,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500651037] [2022-11-20 11:46:55,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:55,340 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 [2022-11-20 11:46:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:55,341 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:55,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 11:46:55,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:55,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:46:55,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:55,786 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:46:55,787 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 [2022-11-20 11:46:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:55,853 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 [2022-11-20 11:46:55,955 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:55,955 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 [2022-11-20 11:46:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:56,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:56,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500651037] [2022-11-20 11:46:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500651037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:56,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:56,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235856211] [2022-11-20 11:46:56,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:56,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:56,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:56,216 INFO L87 Difference]: Start difference. First operand 611 states and 1646 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:56,599 INFO L93 Difference]: Finished difference Result 615 states and 1651 transitions. [2022-11-20 11:46:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:56,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:56,601 INFO L225 Difference]: With dead ends: 615 [2022-11-20 11:46:56,601 INFO L226 Difference]: Without dead ends: 615 [2022-11-20 11:46:56,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:56,602 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:56,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2022-11-20 11:46:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-20 11:46:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 612. [2022-11-20 11:46:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 560 states have (on average 2.9410714285714286) internal successors, (1647), 611 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1647 transitions. [2022-11-20 11:46:56,611 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1647 transitions. Word has length 12 [2022-11-20 11:46:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:56,611 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 1647 transitions. [2022-11-20 11:46:56,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1647 transitions. [2022-11-20 11:46:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:56,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:56,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:56,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 11:46:56,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:56,812 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash -960515712, now seen corresponding path program 2 times [2022-11-20 11:46:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:56,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133084759] [2022-11-20 11:46:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:56,813 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 [2022-11-20 11:46:56,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:56,814 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:56,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 11:46:57,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:46:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:46:57,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:57,215 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:57,215 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 [2022-11-20 11:46:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:57,290 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 [2022-11-20 11:46:57,386 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:57,386 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 [2022-11-20 11:46:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:57,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:57,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:57,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133084759] [2022-11-20 11:46:57,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133084759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:57,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:57,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709435973] [2022-11-20 11:46:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:57,672 INFO L87 Difference]: Start difference. First operand 612 states and 1647 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:58,052 INFO L93 Difference]: Finished difference Result 617 states and 1653 transitions. [2022-11-20 11:46:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:58,054 INFO L225 Difference]: With dead ends: 617 [2022-11-20 11:46:58,054 INFO L226 Difference]: Without dead ends: 617 [2022-11-20 11:46:58,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:58,055 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:58,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:46:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-20 11:46:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 613. [2022-11-20 11:46:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 561 states have (on average 2.9376114081996434) internal successors, (1648), 612 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1648 transitions. [2022-11-20 11:46:58,065 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1648 transitions. Word has length 12 [2022-11-20 11:46:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:58,065 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 1648 transitions. [2022-11-20 11:46:58,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1648 transitions. [2022-11-20 11:46:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:58,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:58,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:58,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-20 11:46:58,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:58,267 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash -965269779, now seen corresponding path program 3 times [2022-11-20 11:46:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:58,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246472707] [2022-11-20 11:46:58,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:58,267 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 [2022-11-20 11:46:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:58,268 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:58,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 11:46:58,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:46:58,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:46:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:58,718 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:46:58,719 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 [2022-11-20 11:46:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:58,798 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 [2022-11-20 11:46:58,903 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:46:58,903 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 [2022-11-20 11:46:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:46:59,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:46:59,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:46:59,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246472707] [2022-11-20 11:46:59,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246472707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:59,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:59,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:46:59,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035426556] [2022-11-20 11:46:59,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:59,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:46:59,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:46:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:46:59,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:59,152 INFO L87 Difference]: Start difference. First operand 613 states and 1648 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:59,565 INFO L93 Difference]: Finished difference Result 616 states and 1652 transitions. [2022-11-20 11:46:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:46:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:59,567 INFO L225 Difference]: With dead ends: 616 [2022-11-20 11:46:59,567 INFO L226 Difference]: Without dead ends: 616 [2022-11-20 11:46:59,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:46:59,567 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:59,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-20 11:46:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-20 11:46:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 614. [2022-11-20 11:46:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 562 states have (on average 2.934163701067616) internal successors, (1649), 613 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1649 transitions. [2022-11-20 11:46:59,581 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1649 transitions. Word has length 12 [2022-11-20 11:46:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:59,582 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 1649 transitions. [2022-11-20 11:46:59,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1649 transitions. [2022-11-20 11:46:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:46:59,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:59,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:59,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:59,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:46:59,798 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:46:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:59,799 INFO L85 PathProgramCache]: Analyzing trace with hash -959996772, now seen corresponding path program 3 times [2022-11-20 11:46:59,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:46:59,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123458745] [2022-11-20 11:46:59,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:59,799 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 [2022-11-20 11:46:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:46:59,800 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:46:59,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 11:47:00,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:47:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:47:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:47:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:00,248 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:47:00,248 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 [2022-11-20 11:47:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:47:00,327 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 [2022-11-20 11:47:00,437 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:47:00,438 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 [2022-11-20 11:47:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:47:00,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:47:00,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:47:00,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123458745] [2022-11-20 11:47:00,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123458745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:00,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:00,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:47:00,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83728352] [2022-11-20 11:47:00,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:00,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:47:00,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:47:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:47:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:47:00,691 INFO L87 Difference]: Start difference. First operand 614 states and 1649 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:47:01,066 INFO L93 Difference]: Finished difference Result 617 states and 1653 transitions. [2022-11-20 11:47:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:47:01,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:47:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:47:01,069 INFO L225 Difference]: With dead ends: 617 [2022-11-20 11:47:01,069 INFO L226 Difference]: Without dead ends: 617 [2022-11-20 11:47:01,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:47:01,070 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:47:01,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-11-20 11:47:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-20 11:47:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 615. [2022-11-20 11:47:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 563 states have (on average 2.930728241563055) internal successors, (1650), 614 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1650 transitions. [2022-11-20 11:47:01,081 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1650 transitions. Word has length 12 [2022-11-20 11:47:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:47:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 1650 transitions. [2022-11-20 11:47:01,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1650 transitions. [2022-11-20 11:47:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:47:01,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:47:01,082 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 11:47:01,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-20 11:47:01,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:47:01,282 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:47:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash 47105169, now seen corresponding path program 3 times [2022-11-20 11:47:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:47:01,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721835748] [2022-11-20 11:47:01,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:47:01,283 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 [2022-11-20 11:47:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:47:01,284 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:47:01,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 11:47:01,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:47:01,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:47:01,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:47:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:01,834 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:47:01,834 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 [2022-11-20 11:47:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:02,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:06,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:47:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721835748] [2022-11-20 11:47:06,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721835748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:06,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:47:06,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:47:06,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73154867] [2022-11-20 11:47:06,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:47:06,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:47:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:47:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:47:06,654 INFO L87 Difference]: Start difference. First operand 615 states and 1650 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) [2022-11-20 11:47:19,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:21,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:23,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:25,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:27,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:29,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:31,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:33,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:35,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:37,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:43,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:45,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:47,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:49,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:51,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:53,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:55,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:57,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:59,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:01,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:20,702 INFO L93 Difference]: Finished difference Result 6687 states and 19067 transitions. [2022-11-20 11:48:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:48:20,704 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 [2022-11-20 11:48:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:20,721 INFO L225 Difference]: With dead ends: 6687 [2022-11-20 11:48:20,721 INFO L226 Difference]: Without dead ends: 6687 [2022-11-20 11:48:20,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:48:20,722 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2496 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4880 mSolverCounterSat, 356 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2496 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 4880 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:20,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2496 Valid, 0 Invalid, 5254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [356 Valid, 4880 Invalid, 18 Unknown, 0 Unchecked, 57.4s Time] [2022-11-20 11:48:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2022-11-20 11:48:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 636. [2022-11-20 11:48:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 584 states have (on average 2.892123287671233) internal successors, (1689), 635 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1689 transitions. [2022-11-20 11:48:20,767 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1689 transitions. Word has length 12 [2022-11-20 11:48:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:20,768 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 1689 transitions. [2022-11-20 11:48:20,768 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) [2022-11-20 11:48:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1689 transitions. [2022-11-20 11:48:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:20,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:20,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:20,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-20 11:48:20,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:20,969 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1786776034, now seen corresponding path program 1 times [2022-11-20 11:48:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691399416] [2022-11-20 11:48:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:20,969 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 [2022-11-20 11:48:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:20,970 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 11:48:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:21,450 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:21,450 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 [2022-11-20 11:48:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:21,524 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 18 treesize of output 24 [2022-11-20 11:48:21,602 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:21,603 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 18 treesize of output 28 [2022-11-20 11:48:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:21,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:21,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:21,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691399416] [2022-11-20 11:48:21,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691399416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:21,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:21,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:21,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632909896] [2022-11-20 11:48:21,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:21,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:21,945 INFO L87 Difference]: Start difference. First operand 636 states and 1689 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) [2022-11-20 11:48:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:22,284 INFO L93 Difference]: Finished difference Result 652 states and 1706 transitions. [2022-11-20 11:48:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:22,285 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 [2022-11-20 11:48:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:22,286 INFO L225 Difference]: With dead ends: 652 [2022-11-20 11:48:22,287 INFO L226 Difference]: Without dead ends: 652 [2022-11-20 11:48:22,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:22,287 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:22,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-20 11:48:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-11-20 11:48:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 636. [2022-11-20 11:48:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 584 states have (on average 2.892123287671233) internal successors, (1689), 635 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1689 transitions. [2022-11-20 11:48:22,303 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1689 transitions. Word has length 13 [2022-11-20 11:48:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:22,303 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 1689 transitions. [2022-11-20 11:48:22,303 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) [2022-11-20 11:48:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1689 transitions. [2022-11-20 11:48:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:22,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:22,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:22,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:22,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:22,520 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1786770547, now seen corresponding path program 1 times [2022-11-20 11:48:22,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:22,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230177768] [2022-11-20 11:48:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:22,521 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 [2022-11-20 11:48:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:22,522 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:22,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 11:48:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:48:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:23,013 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:23,013 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 [2022-11-20 11:48:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:23,086 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 [2022-11-20 11:48:23,171 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:23,172 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 [2022-11-20 11:48:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:23,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:23,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:23,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230177768] [2022-11-20 11:48:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230177768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:23,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:23,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340488078] [2022-11-20 11:48:23,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:23,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:23,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:23,459 INFO L87 Difference]: Start difference. First operand 636 states and 1689 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) [2022-11-20 11:48:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:23,819 INFO L93 Difference]: Finished difference Result 654 states and 1708 transitions. [2022-11-20 11:48:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:23,820 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 [2022-11-20 11:48:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:23,821 INFO L225 Difference]: With dead ends: 654 [2022-11-20 11:48:23,821 INFO L226 Difference]: Without dead ends: 654 [2022-11-20 11:48:23,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:23,822 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:23,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:48:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-20 11:48:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 634. [2022-11-20 11:48:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 582 states have (on average 2.8969072164948453) internal successors, (1686), 633 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1686 transitions. [2022-11-20 11:48:23,832 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1686 transitions. Word has length 13 [2022-11-20 11:48:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:23,832 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 1686 transitions. [2022-11-20 11:48:23,832 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) [2022-11-20 11:48:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1686 transitions. [2022-11-20 11:48:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:23,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:23,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:23,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-20 11:48:24,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:24,035 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:24,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1786796494, now seen corresponding path program 2 times [2022-11-20 11:48:24,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:24,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194225207] [2022-11-20 11:48:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:24,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:24,036 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:24,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 11:48:24,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:48:24,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:48:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:24,475 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:24,475 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 [2022-11-20 11:48:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:24,551 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 [2022-11-20 11:48:24,631 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:24,632 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 [2022-11-20 11:48:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:24,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:24,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194225207] [2022-11-20 11:48:24,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194225207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:24,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:24,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:24,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911916695] [2022-11-20 11:48:24,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:24,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:24,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:24,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:24,974 INFO L87 Difference]: Start difference. First operand 634 states and 1686 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) [2022-11-20 11:48:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:25,291 INFO L93 Difference]: Finished difference Result 650 states and 1703 transitions. [2022-11-20 11:48:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:25,292 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 [2022-11-20 11:48:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:25,294 INFO L225 Difference]: With dead ends: 650 [2022-11-20 11:48:25,294 INFO L226 Difference]: Without dead ends: 650 [2022-11-20 11:48:25,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:25,294 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:25,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-11-20 11:48:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-20 11:48:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 635. [2022-11-20 11:48:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 583 states have (on average 2.893653516295026) internal successors, (1687), 634 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1687 transitions. [2022-11-20 11:48:25,303 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1687 transitions. Word has length 13 [2022-11-20 11:48:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:25,303 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1687 transitions. [2022-11-20 11:48:25,303 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) [2022-11-20 11:48:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1687 transitions. [2022-11-20 11:48:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:25,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:25,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:25,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:25,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:25,507 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1786626397, now seen corresponding path program 2 times [2022-11-20 11:48:25,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:25,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815391597] [2022-11-20 11:48:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:25,509 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 [2022-11-20 11:48:25,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:25,510 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:25,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 11:48:25,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:48:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:48:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:26,040 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:26,041 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 [2022-11-20 11:48:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:26,121 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 [2022-11-20 11:48:26,208 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:26,209 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 [2022-11-20 11:48:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:26,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:26,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:26,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815391597] [2022-11-20 11:48:26,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815391597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:26,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:26,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:26,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295388101] [2022-11-20 11:48:26,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:26,535 INFO L87 Difference]: Start difference. First operand 635 states and 1687 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) [2022-11-20 11:48:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:26,921 INFO L93 Difference]: Finished difference Result 654 states and 1706 transitions. [2022-11-20 11:48:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:26,922 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 [2022-11-20 11:48:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:26,923 INFO L225 Difference]: With dead ends: 654 [2022-11-20 11:48:26,923 INFO L226 Difference]: Without dead ends: 649 [2022-11-20 11:48:26,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:26,924 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:26,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-20 11:48:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-20 11:48:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 635. [2022-11-20 11:48:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 583 states have (on average 2.890222984562607) internal successors, (1685), 634 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1685 transitions. [2022-11-20 11:48:26,933 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1685 transitions. Word has length 13 [2022-11-20 11:48:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:26,933 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1685 transitions. [2022-11-20 11:48:26,933 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) [2022-11-20 11:48:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1685 transitions. [2022-11-20 11:48:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:26,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:26,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:26,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-20 11:48:27,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:27,135 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1779447727, now seen corresponding path program 3 times [2022-11-20 11:48:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:27,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270888807] [2022-11-20 11:48:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:27,135 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 [2022-11-20 11:48:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:27,136 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:27,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 11:48:27,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:48:27,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:48:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:27,563 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:48:27,563 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 [2022-11-20 11:48:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:27,628 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 [2022-11-20 11:48:27,704 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:27,704 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 [2022-11-20 11:48:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:27,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:27,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270888807] [2022-11-20 11:48:27,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270888807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:27,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:27,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:27,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317927395] [2022-11-20 11:48:27,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:27,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:27,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:27,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:27,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:27,984 INFO L87 Difference]: Start difference. First operand 635 states and 1685 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) [2022-11-20 11:48:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:28,371 INFO L93 Difference]: Finished difference Result 649 states and 1699 transitions. [2022-11-20 11:48:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:28,372 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 [2022-11-20 11:48:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:28,373 INFO L225 Difference]: With dead ends: 649 [2022-11-20 11:48:28,373 INFO L226 Difference]: Without dead ends: 649 [2022-11-20 11:48:28,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:28,374 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:28,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-20 11:48:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-20 11:48:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 631. [2022-11-20 11:48:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 579 states have (on average 2.901554404145078) internal successors, (1680), 630 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1680 transitions. [2022-11-20 11:48:28,383 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1680 transitions. Word has length 13 [2022-11-20 11:48:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:28,383 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 1680 transitions. [2022-11-20 11:48:28,383 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) [2022-11-20 11:48:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1680 transitions. [2022-11-20 11:48:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:28,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:28,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:28,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-20 11:48:28,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:28,584 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1926823804, now seen corresponding path program 3 times [2022-11-20 11:48:28,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:28,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162163759] [2022-11-20 11:48:28,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:28,585 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 [2022-11-20 11:48:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:28,586 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:28,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 11:48:28,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:48:28,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:48:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:29,097 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:29,097 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 [2022-11-20 11:48:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:29,175 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 [2022-11-20 11:48:29,261 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:29,261 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 [2022-11-20 11:48:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:29,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:29,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162163759] [2022-11-20 11:48:29,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162163759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:29,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:29,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:29,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534445904] [2022-11-20 11:48:29,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:29,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:29,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:29,557 INFO L87 Difference]: Start difference. First operand 631 states and 1680 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) [2022-11-20 11:48:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:29,967 INFO L93 Difference]: Finished difference Result 644 states and 1693 transitions. [2022-11-20 11:48:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:29,968 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 [2022-11-20 11:48:29,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:29,970 INFO L225 Difference]: With dead ends: 644 [2022-11-20 11:48:29,970 INFO L226 Difference]: Without dead ends: 644 [2022-11-20 11:48:29,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:29,971 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:29,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:48:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-11-20 11:48:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 628. [2022-11-20 11:48:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 576 states have (on average 2.9097222222222223) internal successors, (1676), 627 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1676 transitions. [2022-11-20 11:48:29,980 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1676 transitions. Word has length 13 [2022-11-20 11:48:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:29,980 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 1676 transitions. [2022-11-20 11:48:29,981 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) [2022-11-20 11:48:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1676 transitions. [2022-11-20 11:48:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:29,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:29,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:29,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 11:48:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:30,182 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1612447083, now seen corresponding path program 1 times [2022-11-20 11:48:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:30,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287662445] [2022-11-20 11:48:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:30,183 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 [2022-11-20 11:48:30,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:30,184 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:30,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 11:48:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:48:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:30,706 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:48:30,706 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 [2022-11-20 11:48:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:30,772 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 [2022-11-20 11:48:30,854 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:30,854 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 [2022-11-20 11:48:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:48:31,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:31,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:31,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287662445] [2022-11-20 11:48:31,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287662445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:31,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:31,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:31,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955025465] [2022-11-20 11:48:31,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:31,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:31,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:31,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:31,142 INFO L87 Difference]: Start difference. First operand 628 states and 1676 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) [2022-11-20 11:48:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:31,516 INFO L93 Difference]: Finished difference Result 633 states and 1681 transitions. [2022-11-20 11:48:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:31,517 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 [2022-11-20 11:48:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:31,518 INFO L225 Difference]: With dead ends: 633 [2022-11-20 11:48:31,518 INFO L226 Difference]: Without dead ends: 631 [2022-11-20 11:48:31,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:31,519 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:31,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-20 11:48:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-20 11:48:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 630. [2022-11-20 11:48:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 578 states have (on average 2.903114186851211) internal successors, (1678), 629 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1678 transitions. [2022-11-20 11:48:31,534 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1678 transitions. Word has length 13 [2022-11-20 11:48:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:31,534 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 1678 transitions. [2022-11-20 11:48:31,534 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) [2022-11-20 11:48:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1678 transitions. [2022-11-20 11:48:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:31,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:31,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:31,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:31,743 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1612617180, now seen corresponding path program 1 times [2022-11-20 11:48:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058646139] [2022-11-20 11:48:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:31,745 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 [2022-11-20 11:48:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:31,747 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:31,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 11:48:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:32,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:48:32,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:32,296 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:32,296 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 [2022-11-20 11:48:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:32,403 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 [2022-11-20 11:48:32,490 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:32,491 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 [2022-11-20 11:48:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:48:32,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:32,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:32,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058646139] [2022-11-20 11:48:32,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058646139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:32,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:32,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:32,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577773863] [2022-11-20 11:48:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:32,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:32,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:32,812 INFO L87 Difference]: Start difference. First operand 630 states and 1678 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) [2022-11-20 11:48:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:33,239 INFO L93 Difference]: Finished difference Result 635 states and 1682 transitions. [2022-11-20 11:48:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:33,240 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 [2022-11-20 11:48:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:33,242 INFO L225 Difference]: With dead ends: 635 [2022-11-20 11:48:33,242 INFO L226 Difference]: Without dead ends: 622 [2022-11-20 11:48:33,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:33,242 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:33,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-20 11:48:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-20 11:48:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 621. [2022-11-20 11:48:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 569 states have (on average 2.9244288224956065) internal successors, (1664), 620 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1664 transitions. [2022-11-20 11:48:33,252 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1664 transitions. Word has length 13 [2022-11-20 11:48:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:33,253 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 1664 transitions. [2022-11-20 11:48:33,253 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) [2022-11-20 11:48:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1664 transitions. [2022-11-20 11:48:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:33,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:33,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:33,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:33,455 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -243842914, now seen corresponding path program 1 times [2022-11-20 11:48:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319327137] [2022-11-20 11:48:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:33,456 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 [2022-11-20 11:48:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:33,457 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:33,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 11:48:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:33,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:34,126 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:34,126 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 [2022-11-20 11:48:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:34,226 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 [2022-11-20 11:48:34,364 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:34,364 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 [2022-11-20 11:48:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:48:34,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:34,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319327137] [2022-11-20 11:48:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319327137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:34,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146296433] [2022-11-20 11:48:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:34,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:34,718 INFO L87 Difference]: Start difference. First operand 621 states and 1664 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) [2022-11-20 11:48:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:35,191 INFO L93 Difference]: Finished difference Result 626 states and 1671 transitions. [2022-11-20 11:48:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:35,192 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 [2022-11-20 11:48:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:35,194 INFO L225 Difference]: With dead ends: 626 [2022-11-20 11:48:35,194 INFO L226 Difference]: Without dead ends: 626 [2022-11-20 11:48:35,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:35,195 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:35,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 42 Unchecked, 0.5s Time] [2022-11-20 11:48:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-20 11:48:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 621. [2022-11-20 11:48:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 569 states have (on average 2.9244288224956065) internal successors, (1664), 620 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1664 transitions. [2022-11-20 11:48:35,210 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1664 transitions. Word has length 13 [2022-11-20 11:48:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:35,210 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 1664 transitions. [2022-11-20 11:48:35,210 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) [2022-11-20 11:48:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1664 transitions. [2022-11-20 11:48:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:35,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:35,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:35,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:35,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:35,427 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -243837427, now seen corresponding path program 1 times [2022-11-20 11:48:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:35,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65660463] [2022-11-20 11:48:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:35,428 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 [2022-11-20 11:48:35,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:35,429 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:35,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 11:48:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:48:35,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:36,016 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:36,016 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 [2022-11-20 11:48:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:36,102 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 [2022-11-20 11:48:36,208 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:36,208 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 [2022-11-20 11:48:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:48:36,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:36,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:36,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65660463] [2022-11-20 11:48:36,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65660463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:36,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:36,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987885122] [2022-11-20 11:48:36,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:36,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:36,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:36,594 INFO L87 Difference]: Start difference. First operand 621 states and 1664 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) [2022-11-20 11:48:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:36,970 INFO L93 Difference]: Finished difference Result 625 states and 1670 transitions. [2022-11-20 11:48:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:36,971 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 [2022-11-20 11:48:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:36,972 INFO L225 Difference]: With dead ends: 625 [2022-11-20 11:48:36,972 INFO L226 Difference]: Without dead ends: 625 [2022-11-20 11:48:36,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:36,973 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:36,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-20 11:48:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-20 11:48:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 619. [2022-11-20 11:48:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 567 states have (on average 2.9223985890652555) internal successors, (1657), 618 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1657 transitions. [2022-11-20 11:48:36,983 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1657 transitions. Word has length 13 [2022-11-20 11:48:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:36,983 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 1657 transitions. [2022-11-20 11:48:36,983 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) [2022-11-20 11:48:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1657 transitions. [2022-11-20 11:48:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:36,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:36,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:36,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-20 11:48:37,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:37,184 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash -243775954, now seen corresponding path program 2 times [2022-11-20 11:48:37,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:37,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320259532] [2022-11-20 11:48:37,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:37,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:37,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:37,186 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:37,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 11:48:37,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:48:37,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:37,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:37,690 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:37,690 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 [2022-11-20 11:48:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:37,773 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 18 treesize of output 24 [2022-11-20 11:48:37,878 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:37,878 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 [2022-11-20 11:48:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:48:38,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:38,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320259532] [2022-11-20 11:48:38,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320259532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:38,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:38,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928082865] [2022-11-20 11:48:38,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:38,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:38,170 INFO L87 Difference]: Start difference. First operand 619 states and 1657 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) [2022-11-20 11:48:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:38,548 INFO L93 Difference]: Finished difference Result 623 states and 1663 transitions. [2022-11-20 11:48:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:38,549 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 [2022-11-20 11:48:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:38,550 INFO L225 Difference]: With dead ends: 623 [2022-11-20 11:48:38,550 INFO L226 Difference]: Without dead ends: 623 [2022-11-20 11:48:38,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:38,551 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:38,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 11:48:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-20 11:48:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 619. [2022-11-20 11:48:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 567 states have (on average 2.9223985890652555) internal successors, (1657), 618 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1657 transitions. [2022-11-20 11:48:38,565 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1657 transitions. Word has length 13 [2022-11-20 11:48:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:38,566 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 1657 transitions. [2022-11-20 11:48:38,566 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) [2022-11-20 11:48:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1657 transitions. [2022-11-20 11:48:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:38,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:38,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:38,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:38,781 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -243605857, now seen corresponding path program 2 times [2022-11-20 11:48:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629851246] [2022-11-20 11:48:38,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:38,782 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 [2022-11-20 11:48:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:38,783 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:38,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 11:48:39,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:48:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:48:39,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:39,218 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:39,218 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 [2022-11-20 11:48:39,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:39,293 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 [2022-11-20 11:48:39,398 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:39,398 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 [2022-11-20 11:48:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:48:39,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:39,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629851246] [2022-11-20 11:48:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629851246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:39,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:39,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780665387] [2022-11-20 11:48:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:39,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:39,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:39,679 INFO L87 Difference]: Start difference. First operand 619 states and 1657 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) [2022-11-20 11:48:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:40,049 INFO L93 Difference]: Finished difference Result 623 states and 1663 transitions. [2022-11-20 11:48:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:40,050 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 [2022-11-20 11:48:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:40,052 INFO L225 Difference]: With dead ends: 623 [2022-11-20 11:48:40,053 INFO L226 Difference]: Without dead ends: 623 [2022-11-20 11:48:40,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:40,053 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:40,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-20 11:48:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-20 11:48:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2022-11-20 11:48:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 565 states have (on average 2.9238938053097345) internal successors, (1652), 616 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1652 transitions. [2022-11-20 11:48:40,068 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1652 transitions. Word has length 13 [2022-11-20 11:48:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:40,069 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 1652 transitions. [2022-11-20 11:48:40,069 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) [2022-11-20 11:48:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1652 transitions. [2022-11-20 11:48:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:40,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:40,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:40,279 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -248359924, now seen corresponding path program 3 times [2022-11-20 11:48:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466869055] [2022-11-20 11:48:40,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:40,280 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 [2022-11-20 11:48:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:40,281 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:40,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 11:48:40,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:48:40,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:40,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:48:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:40,794 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:40,794 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 [2022-11-20 11:48:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:40,874 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 [2022-11-20 11:48:40,985 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:40,986 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 [2022-11-20 11:48:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:48:41,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:41,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466869055] [2022-11-20 11:48:41,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466869055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:41,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:41,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084639830] [2022-11-20 11:48:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:41,267 INFO L87 Difference]: Start difference. First operand 617 states and 1652 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) [2022-11-20 11:48:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:41,646 INFO L93 Difference]: Finished difference Result 860 states and 2449 transitions. [2022-11-20 11:48:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:41,647 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 [2022-11-20 11:48:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:41,649 INFO L225 Difference]: With dead ends: 860 [2022-11-20 11:48:41,649 INFO L226 Difference]: Without dead ends: 855 [2022-11-20 11:48:41,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:41,650 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:41,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-11-20 11:48:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-20 11:48:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 622. [2022-11-20 11:48:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 570 states have (on average 2.9210526315789473) internal successors, (1665), 621 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1665 transitions. [2022-11-20 11:48:41,660 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1665 transitions. Word has length 13 [2022-11-20 11:48:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:41,660 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 1665 transitions. [2022-11-20 11:48:41,661 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) [2022-11-20 11:48:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1665 transitions. [2022-11-20 11:48:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:41,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:41,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:41,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-20 11:48:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:41,862 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -243086917, now seen corresponding path program 3 times [2022-11-20 11:48:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:41,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259201696] [2022-11-20 11:48:41,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:41,863 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 [2022-11-20 11:48:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:41,864 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:41,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 11:48:42,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:48:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:42,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:48:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:42,386 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:48:42,387 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 [2022-11-20 11:48:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:42,459 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 [2022-11-20 11:48:42,569 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:42,570 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 [2022-11-20 11:48:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:48:42,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:42,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:42,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259201696] [2022-11-20 11:48:42,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259201696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:42,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:42,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:42,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254995621] [2022-11-20 11:48:42,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:42,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:42,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:42,857 INFO L87 Difference]: Start difference. First operand 622 states and 1665 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) [2022-11-20 11:48:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:43,204 INFO L93 Difference]: Finished difference Result 623 states and 1666 transitions. [2022-11-20 11:48:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:43,205 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 [2022-11-20 11:48:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:43,206 INFO L225 Difference]: With dead ends: 623 [2022-11-20 11:48:43,206 INFO L226 Difference]: Without dead ends: 623 [2022-11-20 11:48:43,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:43,207 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:43,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:48:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-20 11:48:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 615. [2022-11-20 11:48:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 563 states have (on average 2.936056838365897) internal successors, (1653), 614 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1653 transitions. [2022-11-20 11:48:43,215 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1653 transitions. Word has length 13 [2022-11-20 11:48:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:43,216 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 1653 transitions. [2022-11-20 11:48:43,216 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) [2022-11-20 11:48:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1653 transitions. [2022-11-20 11:48:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:43,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:43,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:43,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-20 11:48:43,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:43,430 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash 281452029, now seen corresponding path program 1 times [2022-11-20 11:48:43,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000634003] [2022-11-20 11:48:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:43,431 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 [2022-11-20 11:48:43,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:43,432 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:43,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 11:48:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:43,975 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:43,976 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 [2022-11-20 11:48:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:44,057 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 [2022-11-20 11:48:44,164 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:44,164 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 [2022-11-20 11:48:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:44,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:44,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000634003] [2022-11-20 11:48:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000634003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:44,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:44,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:44,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192965876] [2022-11-20 11:48:44,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:44,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:44,466 INFO L87 Difference]: Start difference. First operand 615 states and 1653 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) [2022-11-20 11:48:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:44,835 INFO L93 Difference]: Finished difference Result 633 states and 1698 transitions. [2022-11-20 11:48:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:44,836 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 [2022-11-20 11:48:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:44,837 INFO L225 Difference]: With dead ends: 633 [2022-11-20 11:48:44,838 INFO L226 Difference]: Without dead ends: 633 [2022-11-20 11:48:44,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:44,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:44,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 11:48:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-20 11:48:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 625. [2022-11-20 11:48:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 573 states have (on average 2.931937172774869) internal successors, (1680), 624 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1680 transitions. [2022-11-20 11:48:44,847 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1680 transitions. Word has length 13 [2022-11-20 11:48:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:44,847 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 1680 transitions. [2022-11-20 11:48:44,847 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) [2022-11-20 11:48:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1680 transitions. [2022-11-20 11:48:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:44,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:44,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:44,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-20 11:48:45,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:45,049 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 281451941, now seen corresponding path program 1 times [2022-11-20 11:48:45,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:45,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691956451] [2022-11-20 11:48:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:45,050 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 [2022-11-20 11:48:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:45,051 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 11:48:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:48:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:45,517 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 [2022-11-20 11:48:45,555 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:48:45,555 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 [2022-11-20 11:48:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:45,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:45,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691956451] [2022-11-20 11:48:45,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691956451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:45,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:45,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:48:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703248986] [2022-11-20 11:48:45,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:45,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:48:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:48:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:48:45,609 INFO L87 Difference]: Start difference. First operand 625 states and 1680 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:46,002 INFO L93 Difference]: Finished difference Result 486 states and 1257 transitions. [2022-11-20 11:48:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:48:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:48:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:46,003 INFO L225 Difference]: With dead ends: 486 [2022-11-20 11:48:46,004 INFO L226 Difference]: Without dead ends: 486 [2022-11-20 11:48:46,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:48:46,004 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:46,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:48:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-20 11:48:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2022-11-20 11:48:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 456 states have (on average 2.7565789473684212) internal successors, (1257), 485 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1257 transitions. [2022-11-20 11:48:46,011 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1257 transitions. Word has length 13 [2022-11-20 11:48:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:46,012 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 1257 transitions. [2022-11-20 11:48:46,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1257 transitions. [2022-11-20 11:48:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:46,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:46,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:46,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:46,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:46,213 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash 281451943, now seen corresponding path program 1 times [2022-11-20 11:48:46,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:46,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520529804] [2022-11-20 11:48:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:46,214 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 [2022-11-20 11:48:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:46,215 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:46,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 11:48:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:48:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:46,783 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 [2022-11-20 11:48:46,809 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 [2022-11-20 11:48:46,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:46,985 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 [2022-11-20 11:48:47,011 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:48:47,011 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 [2022-11-20 11:48:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:48:47,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:48:51,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520529804] [2022-11-20 11:48:51,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520529804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:51,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:48:51,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-20 11:48:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220536713] [2022-11-20 11:48:51,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:48:51,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:48:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:48:51,912 INFO L87 Difference]: Start difference. First operand 486 states and 1257 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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) [2022-11-20 11:48:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:52,281 INFO L93 Difference]: Finished difference Result 578 states and 1466 transitions. [2022-11-20 11:48:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:48:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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 13 [2022-11-20 11:48:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:52,283 INFO L225 Difference]: With dead ends: 578 [2022-11-20 11:48:52,283 INFO L226 Difference]: Without dead ends: 578 [2022-11-20 11:48:52,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:48:52,283 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:52,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2022-11-20 11:48:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-20 11:48:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 576. [2022-11-20 11:48:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 546 states have (on average 2.681318681318681) internal successors, (1464), 575 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1464 transitions. [2022-11-20 11:48:52,291 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1464 transitions. Word has length 13 [2022-11-20 11:48:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:52,291 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 1464 transitions. [2022-11-20 11:48:52,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 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) [2022-11-20 11:48:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1464 transitions. [2022-11-20 11:48:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:52,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:52,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:52,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-20 11:48:52,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:52,492 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:52,493 INFO L85 PathProgramCache]: Analyzing trace with hash 281457516, now seen corresponding path program 1 times [2022-11-20 11:48:52,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:52,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108643734] [2022-11-20 11:48:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:52,493 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 [2022-11-20 11:48:52,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:52,494 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:52,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-20 11:48:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:48:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:53,044 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:53,045 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 [2022-11-20 11:48:53,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:53,124 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 [2022-11-20 11:48:53,237 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:53,237 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 [2022-11-20 11:48:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:53,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:53,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108643734] [2022-11-20 11:48:53,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108643734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:53,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:53,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753911364] [2022-11-20 11:48:53,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:53,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:53,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:53,533 INFO L87 Difference]: Start difference. First operand 576 states and 1464 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) [2022-11-20 11:48:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:53,937 INFO L93 Difference]: Finished difference Result 586 states and 1483 transitions. [2022-11-20 11:48:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:53,938 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 [2022-11-20 11:48:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:53,939 INFO L225 Difference]: With dead ends: 586 [2022-11-20 11:48:53,940 INFO L226 Difference]: Without dead ends: 586 [2022-11-20 11:48:53,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:53,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:53,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-11-20 11:48:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-20 11:48:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 578. [2022-11-20 11:48:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 548 states have (on average 2.6806569343065694) internal successors, (1469), 577 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1469 transitions. [2022-11-20 11:48:53,949 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1469 transitions. Word has length 13 [2022-11-20 11:48:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:53,949 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 1469 transitions. [2022-11-20 11:48:53,949 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) [2022-11-20 11:48:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1469 transitions. [2022-11-20 11:48:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:53,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:53,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:53,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:54,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:54,151 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:54,151 INFO L85 PathProgramCache]: Analyzing trace with hash 281431569, now seen corresponding path program 2 times [2022-11-20 11:48:54,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:54,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761224747] [2022-11-20 11:48:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:54,152 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 [2022-11-20 11:48:54,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:54,153 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:54,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-20 11:48:54,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:48:54,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:48:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:54,707 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:48:54,707 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:48:54,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:54,779 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 [2022-11-20 11:48:54,895 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:54,895 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 [2022-11-20 11:48:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:55,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:55,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761224747] [2022-11-20 11:48:55,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761224747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:55,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:55,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100684009] [2022-11-20 11:48:55,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:55,180 INFO L87 Difference]: Start difference. First operand 578 states and 1469 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) [2022-11-20 11:48:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:55,580 INFO L93 Difference]: Finished difference Result 589 states and 1489 transitions. [2022-11-20 11:48:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:55,581 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 [2022-11-20 11:48:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:55,582 INFO L225 Difference]: With dead ends: 589 [2022-11-20 11:48:55,582 INFO L226 Difference]: Without dead ends: 589 [2022-11-20 11:48:55,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:55,582 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:55,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 110 Unchecked, 0.4s Time] [2022-11-20 11:48:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-20 11:48:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 581. [2022-11-20 11:48:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 551 states have (on average 2.676950998185118) internal successors, (1475), 580 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1475 transitions. [2022-11-20 11:48:55,591 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1475 transitions. Word has length 13 [2022-11-20 11:48:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:55,591 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 1475 transitions. [2022-11-20 11:48:55,592 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) [2022-11-20 11:48:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1475 transitions. [2022-11-20 11:48:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:55,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:55,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:55,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:55,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:55,793 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash 281601666, now seen corresponding path program 2 times [2022-11-20 11:48:55,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162931569] [2022-11-20 11:48:55,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:48:55,794 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 [2022-11-20 11:48:55,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:55,795 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:55,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-20 11:48:56,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:48:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:56,329 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:56,330 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 [2022-11-20 11:48:56,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:56,412 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 [2022-11-20 11:48:56,544 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:56,545 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 [2022-11-20 11:48:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:56,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:56,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:56,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162931569] [2022-11-20 11:48:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162931569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:56,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:56,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435363948] [2022-11-20 11:48:56,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:56,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:56,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:56,840 INFO L87 Difference]: Start difference. First operand 581 states and 1475 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) [2022-11-20 11:48:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:57,241 INFO L93 Difference]: Finished difference Result 590 states and 1490 transitions. [2022-11-20 11:48:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:57,242 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 [2022-11-20 11:48:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:57,243 INFO L225 Difference]: With dead ends: 590 [2022-11-20 11:48:57,243 INFO L226 Difference]: Without dead ends: 590 [2022-11-20 11:48:57,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:57,244 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:57,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-11-20 11:48:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-20 11:48:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 583. [2022-11-20 11:48:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 553 states have (on average 2.674502712477396) internal successors, (1479), 582 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1479 transitions. [2022-11-20 11:48:57,252 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1479 transitions. Word has length 13 [2022-11-20 11:48:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:57,252 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 1479 transitions. [2022-11-20 11:48:57,252 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) [2022-11-20 11:48:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1479 transitions. [2022-11-20 11:48:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:57,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:57,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:57,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:57,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:57,454 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 283507329, now seen corresponding path program 3 times [2022-11-20 11:48:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:57,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408868457] [2022-11-20 11:48:57,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:57,455 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 [2022-11-20 11:48:57,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:57,456 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:57,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-20 11:48:57,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:48:57,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:57,977 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:57,977 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 [2022-11-20 11:48:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:58,061 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 [2022-11-20 11:48:58,178 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:58,179 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 [2022-11-20 11:48:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:48:58,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:48:58,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:48:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408868457] [2022-11-20 11:48:58,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408868457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:58,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:58,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:48:58,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015545208] [2022-11-20 11:48:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:58,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:48:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:58,451 INFO L87 Difference]: Start difference. First operand 583 states and 1479 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) [2022-11-20 11:48:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:58,873 INFO L93 Difference]: Finished difference Result 587 states and 1484 transitions. [2022-11-20 11:48:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:58,874 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 [2022-11-20 11:48:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:58,876 INFO L225 Difference]: With dead ends: 587 [2022-11-20 11:48:58,876 INFO L226 Difference]: Without dead ends: 587 [2022-11-20 11:48:58,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:58,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:58,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-20 11:48:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-20 11:48:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 579. [2022-11-20 11:48:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 549 states have (on average 2.675774134790528) internal successors, (1469), 578 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1469 transitions. [2022-11-20 11:48:58,886 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1469 transitions. Word has length 13 [2022-11-20 11:48:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:58,887 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 1469 transitions. [2022-11-20 11:48:58,887 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) [2022-11-20 11:48:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1469 transitions. [2022-11-20 11:48:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:48:58,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:58,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:58,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:59,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:48:59,088 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:48:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash 288780336, now seen corresponding path program 3 times [2022-11-20 11:48:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:48:59,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018330192] [2022-11-20 11:48:59,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:48:59,089 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 [2022-11-20 11:48:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:48:59,090 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:48:59,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-20 11:48:59,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:48:59,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:48:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:48:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:59,561 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:48:59,562 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 [2022-11-20 11:48:59,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:48:59,643 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 [2022-11-20 11:48:59,752 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:48:59,752 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 [2022-11-20 11:49:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:00,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:00,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:00,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018330192] [2022-11-20 11:49:00,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018330192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:00,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:00,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820976669] [2022-11-20 11:49:00,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:00,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:00,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:00,006 INFO L87 Difference]: Start difference. First operand 579 states and 1469 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) [2022-11-20 11:49:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:00,376 INFO L93 Difference]: Finished difference Result 587 states and 1482 transitions. [2022-11-20 11:49:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:00,376 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 [2022-11-20 11:49:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:00,378 INFO L225 Difference]: With dead ends: 587 [2022-11-20 11:49:00,378 INFO L226 Difference]: Without dead ends: 587 [2022-11-20 11:49:00,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:00,378 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:00,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-11-20 11:49:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-20 11:49:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 581. [2022-11-20 11:49:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 551 states have (on average 2.6696914700544463) internal successors, (1471), 580 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1471 transitions. [2022-11-20 11:49:00,388 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1471 transitions. Word has length 13 [2022-11-20 11:49:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:00,388 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 1471 transitions. [2022-11-20 11:49:00,388 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) [2022-11-20 11:49:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1471 transitions. [2022-11-20 11:49:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:49:00,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:00,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:00,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:00,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:00,590 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 304867476, now seen corresponding path program 4 times [2022-11-20 11:49:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:00,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106603705] [2022-11-20 11:49:00,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:49:00,591 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 [2022-11-20 11:49:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:00,592 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-20 11:49:01,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:49:01,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:49:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:01,223 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:01,223 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 [2022-11-20 11:49:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:01,303 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 [2022-11-20 11:49:01,410 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:01,410 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 [2022-11-20 11:49:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:01,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:01,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:01,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106603705] [2022-11-20 11:49:01,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106603705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:01,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:01,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:01,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471921940] [2022-11-20 11:49:01,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:01,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:01,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:01,717 INFO L87 Difference]: Start difference. First operand 581 states and 1471 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) [2022-11-20 11:49:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:02,118 INFO L93 Difference]: Finished difference Result 584 states and 1476 transitions. [2022-11-20 11:49:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:02,119 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 [2022-11-20 11:49:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:02,120 INFO L225 Difference]: With dead ends: 584 [2022-11-20 11:49:02,120 INFO L226 Difference]: Without dead ends: 584 [2022-11-20 11:49:02,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:02,121 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:02,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-20 11:49:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-20 11:49:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 578. [2022-11-20 11:49:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 548 states have (on average 2.673357664233577) internal successors, (1465), 577 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1465 transitions. [2022-11-20 11:49:02,129 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1465 transitions. Word has length 13 [2022-11-20 11:49:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:02,130 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 1465 transitions. [2022-11-20 11:49:02,130 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) [2022-11-20 11:49:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1465 transitions. [2022-11-20 11:49:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:02,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:02,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:02,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:02,331 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 444516362, now seen corresponding path program 1 times [2022-11-20 11:49:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974462270] [2022-11-20 11:49:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:02,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:02,333 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:02,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-20 11:49:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:49:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:03,036 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:49:03,037 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 [2022-11-20 11:49:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:03,126 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 [2022-11-20 11:49:03,240 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:03,240 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 [2022-11-20 11:49:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:03,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:03,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:03,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974462270] [2022-11-20 11:49:03,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974462270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:03,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:03,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122544468] [2022-11-20 11:49:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:03,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:03,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:03,608 INFO L87 Difference]: Start difference. First operand 578 states and 1465 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:03,974 INFO L93 Difference]: Finished difference Result 594 states and 1481 transitions. [2022-11-20 11:49:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:03,977 INFO L225 Difference]: With dead ends: 594 [2022-11-20 11:49:03,977 INFO L226 Difference]: Without dead ends: 592 [2022-11-20 11:49:03,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:03,977 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:03,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-11-20 11:49:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-20 11:49:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 578. [2022-11-20 11:49:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 548 states have (on average 2.6715328467153285) internal successors, (1464), 577 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1464 transitions. [2022-11-20 11:49:03,985 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1464 transitions. Word has length 14 [2022-11-20 11:49:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:03,985 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 1464 transitions. [2022-11-20 11:49:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1464 transitions. [2022-11-20 11:49:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:03,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:03,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:03,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:04,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:04,187 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash 444686459, now seen corresponding path program 1 times [2022-11-20 11:49:04,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128777291] [2022-11-20 11:49:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:04,187 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 [2022-11-20 11:49:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:04,188 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:04,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-20 11:49:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:04,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:04,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:04,792 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:04,792 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 [2022-11-20 11:49:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:04,874 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 [2022-11-20 11:49:04,960 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:04,961 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 18 treesize of output 28 [2022-11-20 11:49:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:05,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:05,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128777291] [2022-11-20 11:49:05,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128777291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:05,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277589434] [2022-11-20 11:49:05,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:05,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:05,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:05,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:05,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:05,318 INFO L87 Difference]: Start difference. First operand 578 states and 1464 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:05,698 INFO L93 Difference]: Finished difference Result 590 states and 1477 transitions. [2022-11-20 11:49:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:05,700 INFO L225 Difference]: With dead ends: 590 [2022-11-20 11:49:05,700 INFO L226 Difference]: Without dead ends: 574 [2022-11-20 11:49:05,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:05,700 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:05,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 11:49:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-20 11:49:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 546. [2022-11-20 11:49:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 518 states have (on average 2.7316602316602316) internal successors, (1415), 545 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1415 transitions. [2022-11-20 11:49:05,708 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1415 transitions. Word has length 14 [2022-11-20 11:49:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:05,708 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 1415 transitions. [2022-11-20 11:49:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1415 transitions. [2022-11-20 11:49:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:05,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:05,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:05,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:05,915 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1030821054, now seen corresponding path program 1 times [2022-11-20 11:49:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:05,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142955249] [2022-11-20 11:49:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:05,916 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 [2022-11-20 11:49:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:05,917 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:05,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 11:49:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:06,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:06,623 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:06,623 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 [2022-11-20 11:49:06,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:06,714 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 [2022-11-20 11:49:06,829 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:06,829 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 [2022-11-20 11:49:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:07,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:07,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:07,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142955249] [2022-11-20 11:49:07,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142955249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:07,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:07,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:07,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558624218] [2022-11-20 11:49:07,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:07,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:07,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:07,201 INFO L87 Difference]: Start difference. First operand 546 states and 1415 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:07,499 INFO L93 Difference]: Finished difference Result 555 states and 1435 transitions. [2022-11-20 11:49:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:07,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:07,501 INFO L225 Difference]: With dead ends: 555 [2022-11-20 11:49:07,501 INFO L226 Difference]: Without dead ends: 555 [2022-11-20 11:49:07,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:07,501 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:07,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-20 11:49:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-20 11:49:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 546. [2022-11-20 11:49:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 518 states have (on average 2.7316602316602316) internal successors, (1415), 545 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1415 transitions. [2022-11-20 11:49:07,509 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1415 transitions. Word has length 14 [2022-11-20 11:49:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:07,509 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 1415 transitions. [2022-11-20 11:49:07,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1415 transitions. [2022-11-20 11:49:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:07,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:07,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:07,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-20 11:49:07,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:07,710 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1030820968, now seen corresponding path program 1 times [2022-11-20 11:49:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633586851] [2022-11-20 11:49:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:07,711 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 [2022-11-20 11:49:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:07,712 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:07,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-20 11:49:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:49:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:08,206 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 [2022-11-20 11:49:08,384 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:49:08,384 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 [2022-11-20 11:49:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:49:08,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:49:12,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:12,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633586851] [2022-11-20 11:49:12,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633586851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:12,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:49:12,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 11:49:12,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584264482] [2022-11-20 11:49:12,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:12,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:49:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:49:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:49:12,087 INFO L87 Difference]: Start difference. First operand 546 states and 1415 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2022-11-20 11:49:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:12,419 INFO L93 Difference]: Finished difference Result 587 states and 1498 transitions. [2022-11-20 11:49:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:49:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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 14 [2022-11-20 11:49:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:12,421 INFO L225 Difference]: With dead ends: 587 [2022-11-20 11:49:12,421 INFO L226 Difference]: Without dead ends: 587 [2022-11-20 11:49:12,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:49:12,421 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:12,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 206 Unchecked, 0.3s Time] [2022-11-20 11:49:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-20 11:49:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-11-20 11:49:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 532 states have (on average 2.7218045112781954) internal successors, (1448), 559 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1448 transitions. [2022-11-20 11:49:12,431 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1448 transitions. Word has length 14 [2022-11-20 11:49:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:12,431 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 1448 transitions. [2022-11-20 11:49:12,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2022-11-20 11:49:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1448 transitions. [2022-11-20 11:49:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:12,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:12,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:12,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:12,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:12,632 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1030826541, now seen corresponding path program 1 times [2022-11-20 11:49:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:12,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324738518] [2022-11-20 11:49:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:12,633 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 [2022-11-20 11:49:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:12,634 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:12,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-20 11:49:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:49:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:13,222 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:13,223 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 [2022-11-20 11:49:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:13,292 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 [2022-11-20 11:49:13,390 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:13,390 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 [2022-11-20 11:49:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:13,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:13,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:13,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324738518] [2022-11-20 11:49:13,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324738518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:13,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:13,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:13,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704180298] [2022-11-20 11:49:13,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:13,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:13,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:13,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:13,709 INFO L87 Difference]: Start difference. First operand 560 states and 1448 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:14,039 INFO L93 Difference]: Finished difference Result 570 states and 1467 transitions. [2022-11-20 11:49:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:14,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:14,041 INFO L225 Difference]: With dead ends: 570 [2022-11-20 11:49:14,041 INFO L226 Difference]: Without dead ends: 570 [2022-11-20 11:49:14,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:14,042 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:14,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-20 11:49:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-20 11:49:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2022-11-20 11:49:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 528 states have (on average 2.7234848484848486) internal successors, (1438), 555 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1438 transitions. [2022-11-20 11:49:14,051 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1438 transitions. Word has length 14 [2022-11-20 11:49:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:14,052 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 1438 transitions. [2022-11-20 11:49:14,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1438 transitions. [2022-11-20 11:49:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:14,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:14,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:14,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:14,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:14,253 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1030826455, now seen corresponding path program 1 times [2022-11-20 11:49:14,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:14,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431810282] [2022-11-20 11:49:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:14,254 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 [2022-11-20 11:49:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:14,255 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:14,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 11:49:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:14,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:49:14,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:14,888 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 [2022-11-20 11:49:14,901 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 [2022-11-20 11:49:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:15,061 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 [2022-11-20 11:49:15,079 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:49:15,079 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 [2022-11-20 11:49:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:22,168 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:49:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:22,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431810282] [2022-11-20 11:49:22,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431810282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:22,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:49:22,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-20 11:49:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920298576] [2022-11-20 11:49:22,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:49:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:49:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:49:22,895 INFO L87 Difference]: Start difference. First operand 556 states and 1438 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 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) [2022-11-20 11:49:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:23,505 INFO L93 Difference]: Finished difference Result 1102 states and 2932 transitions. [2022-11-20 11:49:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:49:23,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 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 14 [2022-11-20 11:49:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:23,508 INFO L225 Difference]: With dead ends: 1102 [2022-11-20 11:49:23,508 INFO L226 Difference]: Without dead ends: 1102 [2022-11-20 11:49:23,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:49:23,509 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:23,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 146 Unchecked, 0.6s Time] [2022-11-20 11:49:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-11-20 11:49:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 853. [2022-11-20 11:49:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 825 states have (on average 2.923636363636364) internal successors, (2412), 852 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2412 transitions. [2022-11-20 11:49:23,528 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2412 transitions. Word has length 14 [2022-11-20 11:49:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:23,528 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 2412 transitions. [2022-11-20 11:49:23,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 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) [2022-11-20 11:49:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2412 transitions. [2022-11-20 11:49:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:23,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:23,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:23,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:23,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:23,730 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:23,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1030800594, now seen corresponding path program 2 times [2022-11-20 11:49:23,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:23,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382605748] [2022-11-20 11:49:23,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:23,731 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 [2022-11-20 11:49:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:23,731 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:23,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-20 11:49:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:24,282 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:24,282 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 [2022-11-20 11:49:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:24,365 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 [2022-11-20 11:49:24,474 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:24,475 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 [2022-11-20 11:49:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:24,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:24,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:24,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382605748] [2022-11-20 11:49:24,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382605748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:24,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:24,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329003326] [2022-11-20 11:49:24,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:24,787 INFO L87 Difference]: Start difference. First operand 853 states and 2412 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:25,129 INFO L93 Difference]: Finished difference Result 865 states and 2438 transitions. [2022-11-20 11:49:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:25,132 INFO L225 Difference]: With dead ends: 865 [2022-11-20 11:49:25,132 INFO L226 Difference]: Without dead ends: 865 [2022-11-20 11:49:25,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:25,132 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:25,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-20 11:49:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-20 11:49:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 853. [2022-11-20 11:49:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 825 states have (on average 2.923636363636364) internal successors, (2412), 852 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2412 transitions. [2022-11-20 11:49:25,146 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2412 transitions. Word has length 14 [2022-11-20 11:49:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:25,146 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 2412 transitions. [2022-11-20 11:49:25,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2412 transitions. [2022-11-20 11:49:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:25,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:25,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:25,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-20 11:49:25,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:25,347 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1030970691, now seen corresponding path program 2 times [2022-11-20 11:49:25,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:25,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039293359] [2022-11-20 11:49:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:25,348 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 [2022-11-20 11:49:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:25,349 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:25,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-20 11:49:25,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:25,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:25,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:25,898 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:25,898 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 [2022-11-20 11:49:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:25,980 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 [2022-11-20 11:49:26,099 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:26,099 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 [2022-11-20 11:49:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:26,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:26,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039293359] [2022-11-20 11:49:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039293359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:26,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:26,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257935049] [2022-11-20 11:49:26,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:26,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:26,457 INFO L87 Difference]: Start difference. First operand 853 states and 2412 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:26,825 INFO L93 Difference]: Finished difference Result 884 states and 2473 transitions. [2022-11-20 11:49:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:26,828 INFO L225 Difference]: With dead ends: 884 [2022-11-20 11:49:26,828 INFO L226 Difference]: Without dead ends: 884 [2022-11-20 11:49:26,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:26,829 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:26,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-20 11:49:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-20 11:49:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 866. [2022-11-20 11:49:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 838 states have (on average 2.903341288782816) internal successors, (2433), 865 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2433 transitions. [2022-11-20 11:49:26,855 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2433 transitions. Word has length 14 [2022-11-20 11:49:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:26,856 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 2433 transitions. [2022-11-20 11:49:26,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2433 transitions. [2022-11-20 11:49:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:26,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:26,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:26,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:27,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:27,057 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1032876354, now seen corresponding path program 3 times [2022-11-20 11:49:27,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:27,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83306286] [2022-11-20 11:49:27,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:49:27,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:27,059 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:27,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-20 11:49:27,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:49:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:49:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:27,562 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:27,562 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 [2022-11-20 11:49:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:27,641 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 [2022-11-20 11:49:27,742 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:27,742 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 [2022-11-20 11:49:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:28,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:28,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83306286] [2022-11-20 11:49:28,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83306286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:28,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:28,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:28,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756782066] [2022-11-20 11:49:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:28,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:28,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:28,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:28,047 INFO L87 Difference]: Start difference. First operand 866 states and 2433 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:28,386 INFO L93 Difference]: Finished difference Result 872 states and 2443 transitions. [2022-11-20 11:49:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:28,389 INFO L225 Difference]: With dead ends: 872 [2022-11-20 11:49:28,389 INFO L226 Difference]: Without dead ends: 872 [2022-11-20 11:49:28,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:28,389 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:28,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-20 11:49:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-20 11:49:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 857. [2022-11-20 11:49:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 829 states have (on average 2.9119420989143547) internal successors, (2414), 856 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2414 transitions. [2022-11-20 11:49:28,407 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2414 transitions. Word has length 14 [2022-11-20 11:49:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:28,407 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 2414 transitions. [2022-11-20 11:49:28,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2414 transitions. [2022-11-20 11:49:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:28,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:28,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:28,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-20 11:49:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:28,622 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1038149361, now seen corresponding path program 3 times [2022-11-20 11:49:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702519393] [2022-11-20 11:49:28,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:49:28,623 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 [2022-11-20 11:49:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:28,624 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:28,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-20 11:49:28,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:49:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:49:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:29,147 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:29,147 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 [2022-11-20 11:49:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:29,230 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 [2022-11-20 11:49:29,338 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:29,338 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 [2022-11-20 11:49:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:29,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:29,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:29,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702519393] [2022-11-20 11:49:29,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702519393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:29,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:29,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094378137] [2022-11-20 11:49:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:29,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:29,716 INFO L87 Difference]: Start difference. First operand 857 states and 2414 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:30,076 INFO L93 Difference]: Finished difference Result 875 states and 2446 transitions. [2022-11-20 11:49:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:30,078 INFO L225 Difference]: With dead ends: 875 [2022-11-20 11:49:30,079 INFO L226 Difference]: Without dead ends: 875 [2022-11-20 11:49:30,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:30,079 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:30,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-11-20 11:49:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-11-20 11:49:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 851. [2022-11-20 11:49:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 823 states have (on average 2.9149453219927097) internal successors, (2399), 850 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2399 transitions. [2022-11-20 11:49:30,093 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2399 transitions. Word has length 14 [2022-11-20 11:49:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:30,093 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 2399 transitions. [2022-11-20 11:49:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2399 transitions. [2022-11-20 11:49:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:30,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:30,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:30,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:30,294 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1054236501, now seen corresponding path program 4 times [2022-11-20 11:49:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:30,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447629133] [2022-11-20 11:49:30,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:49:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:30,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:30,296 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:30,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-20 11:49:30,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:49:30,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:49:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:31,019 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:31,020 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 [2022-11-20 11:49:31,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:31,103 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 [2022-11-20 11:49:31,219 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:31,220 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 [2022-11-20 11:49:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:31,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:31,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447629133] [2022-11-20 11:49:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447629133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:31,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:31,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:31,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089636464] [2022-11-20 11:49:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:31,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:31,505 INFO L87 Difference]: Start difference. First operand 851 states and 2399 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:31,852 INFO L93 Difference]: Finished difference Result 860 states and 2412 transitions. [2022-11-20 11:49:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:31,855 INFO L225 Difference]: With dead ends: 860 [2022-11-20 11:49:31,855 INFO L226 Difference]: Without dead ends: 860 [2022-11-20 11:49:31,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:31,855 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:31,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-11-20 11:49:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-20 11:49:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 830. [2022-11-20 11:49:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 802 states have (on average 2.9413965087281797) internal successors, (2359), 829 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2359 transitions. [2022-11-20 11:49:31,867 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2359 transitions. Word has length 14 [2022-11-20 11:49:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:31,868 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 2359 transitions. [2022-11-20 11:49:31,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2359 transitions. [2022-11-20 11:49:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:31,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:31,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:31,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:32,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:32,069 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:32,069 INFO L85 PathProgramCache]: Analyzing trace with hash 135076875, now seen corresponding path program 1 times [2022-11-20 11:49:32,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:32,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424539289] [2022-11-20 11:49:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:32,070 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 [2022-11-20 11:49:32,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:32,071 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:32,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-20 11:49:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:49:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:32,667 INFO L321 Elim1Store]: treesize reduction 81, result has 22.1 percent of original size [2022-11-20 11:49:32,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 37 [2022-11-20 11:49:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:32,768 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 14 treesize of output 20 [2022-11-20 11:49:32,892 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:49:32,892 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 [2022-11-20 11:49:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:33,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:33,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424539289] [2022-11-20 11:49:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424539289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:33,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:33,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:49:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876816951] [2022-11-20 11:49:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:33,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:49:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:49:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:49:33,417 INFO L87 Difference]: Start difference. First operand 830 states and 2359 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:33,788 INFO L93 Difference]: Finished difference Result 872 states and 2456 transitions. [2022-11-20 11:49:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:33,791 INFO L225 Difference]: With dead ends: 872 [2022-11-20 11:49:33,791 INFO L226 Difference]: Without dead ends: 872 [2022-11-20 11:49:33,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:33,792 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:33,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-20 11:49:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-20 11:49:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 863. [2022-11-20 11:49:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 835 states have (on average 2.926946107784431) internal successors, (2444), 862 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2444 transitions. [2022-11-20 11:49:33,805 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2444 transitions. Word has length 14 [2022-11-20 11:49:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:33,806 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 2444 transitions. [2022-11-20 11:49:33,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2444 transitions. [2022-11-20 11:49:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:33,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:33,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:33,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:34,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:34,007 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash 135246972, now seen corresponding path program 1 times [2022-11-20 11:49:34,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:34,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220796965] [2022-11-20 11:49:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:34,008 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 [2022-11-20 11:49:34,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:34,009 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:34,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-20 11:49:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:34,724 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:34,724 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 [2022-11-20 11:49:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:34,803 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 [2022-11-20 11:49:34,918 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:34,919 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 [2022-11-20 11:49:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:35,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:35,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220796965] [2022-11-20 11:49:35,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220796965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:35,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:35,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732106755] [2022-11-20 11:49:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:35,240 INFO L87 Difference]: Start difference. First operand 863 states and 2444 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:35,609 INFO L93 Difference]: Finished difference Result 908 states and 2535 transitions. [2022-11-20 11:49:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:35,612 INFO L225 Difference]: With dead ends: 908 [2022-11-20 11:49:35,612 INFO L226 Difference]: Without dead ends: 908 [2022-11-20 11:49:35,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:35,612 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:35,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-11-20 11:49:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-20 11:49:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 871. [2022-11-20 11:49:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 843 states have (on average 2.9122182680901543) internal successors, (2455), 870 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2455 transitions. [2022-11-20 11:49:35,625 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2455 transitions. Word has length 14 [2022-11-20 11:49:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:35,626 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 2455 transitions. [2022-11-20 11:49:35,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2455 transitions. [2022-11-20 11:49:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:49:35,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:35,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:35,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:35,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:35,827 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:35,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:35,827 INFO L85 PathProgramCache]: Analyzing trace with hash 134442615, now seen corresponding path program 2 times [2022-11-20 11:49:35,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:35,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527773306] [2022-11-20 11:49:35,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:35,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:35,829 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:35,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-20 11:49:36,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:36,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:49:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:36,355 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:36,356 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 11:49:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:36,433 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 [2022-11-20 11:49:36,552 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:36,553 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 [2022-11-20 11:49:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:36,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:36,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527773306] [2022-11-20 11:49:36,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527773306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:36,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:36,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902981592] [2022-11-20 11:49:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:36,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:36,862 INFO L87 Difference]: Start difference. First operand 871 states and 2455 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:37,126 INFO L93 Difference]: Finished difference Result 898 states and 2508 transitions. [2022-11-20 11:49:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:37,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:49:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:37,129 INFO L225 Difference]: With dead ends: 898 [2022-11-20 11:49:37,129 INFO L226 Difference]: Without dead ends: 898 [2022-11-20 11:49:37,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:37,130 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-20 11:49:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-20 11:49:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 877. [2022-11-20 11:49:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 849 states have (on average 2.9022379269729095) internal successors, (2464), 876 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2464 transitions. [2022-11-20 11:49:37,141 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2464 transitions. Word has length 14 [2022-11-20 11:49:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:37,141 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2464 transitions. [2022-11-20 11:49:37,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2464 transitions. [2022-11-20 11:49:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:37,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:37,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:37,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-20 11:49:37,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:37,342 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1890680170, now seen corresponding path program 1 times [2022-11-20 11:49:37,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:37,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922902172] [2022-11-20 11:49:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:37,343 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 [2022-11-20 11:49:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:37,344 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:37,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-20 11:49:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:49:37,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:38,081 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:38,081 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 [2022-11-20 11:49:38,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:38,161 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 [2022-11-20 11:49:38,254 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:38,254 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 [2022-11-20 11:49:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:38,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:38,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:38,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922902172] [2022-11-20 11:49:38,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922902172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:38,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:38,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630971703] [2022-11-20 11:49:38,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:38,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:38,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:38,542 INFO L87 Difference]: Start difference. First operand 877 states and 2464 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) [2022-11-20 11:49:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:38,827 INFO L93 Difference]: Finished difference Result 895 states and 2508 transitions. [2022-11-20 11:49:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:38,828 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 [2022-11-20 11:49:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:38,830 INFO L225 Difference]: With dead ends: 895 [2022-11-20 11:49:38,830 INFO L226 Difference]: Without dead ends: 895 [2022-11-20 11:49:38,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:38,830 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:38,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-20 11:49:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-20 11:49:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 877. [2022-11-20 11:49:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 849 states have (on average 2.9022379269729095) internal successors, (2464), 876 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2464 transitions. [2022-11-20 11:49:38,844 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2464 transitions. Word has length 15 [2022-11-20 11:49:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:38,844 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2464 transitions. [2022-11-20 11:49:38,844 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) [2022-11-20 11:49:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2464 transitions. [2022-11-20 11:49:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:38,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:38,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:38,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:39,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:39,045 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1890850267, now seen corresponding path program 1 times [2022-11-20 11:49:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:39,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250866083] [2022-11-20 11:49:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:39,046 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 [2022-11-20 11:49:39,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:39,047 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:39,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-20 11:49:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:49:39,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:39,842 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:39,842 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 [2022-11-20 11:49:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:39,920 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 [2022-11-20 11:49:40,034 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:40,035 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 [2022-11-20 11:49:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:40,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:40,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:40,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250866083] [2022-11-20 11:49:40,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250866083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:40,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:40,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:40,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001046488] [2022-11-20 11:49:40,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:40,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:40,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:40,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:40,370 INFO L87 Difference]: Start difference. First operand 877 states and 2464 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) [2022-11-20 11:49:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:40,712 INFO L93 Difference]: Finished difference Result 872 states and 2445 transitions. [2022-11-20 11:49:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:40,713 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 [2022-11-20 11:49:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:40,715 INFO L225 Difference]: With dead ends: 872 [2022-11-20 11:49:40,715 INFO L226 Difference]: Without dead ends: 872 [2022-11-20 11:49:40,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:40,716 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:40,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-11-20 11:49:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-20 11:49:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 842. [2022-11-20 11:49:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 815 states have (on average 2.923926380368098) internal successors, (2383), 841 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2383 transitions. [2022-11-20 11:49:40,728 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2383 transitions. Word has length 15 [2022-11-20 11:49:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:40,728 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 2383 transitions. [2022-11-20 11:49:40,728 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) [2022-11-20 11:49:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2383 transitions. [2022-11-20 11:49:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:40,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:40,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:40,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:40,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:40,930 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1890045910, now seen corresponding path program 2 times [2022-11-20 11:49:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:40,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075317812] [2022-11-20 11:49:40,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:40,931 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 [2022-11-20 11:49:40,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:40,932 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:40,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-20 11:49:41,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:41,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:41,522 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:41,522 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 [2022-11-20 11:49:41,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:41,602 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 [2022-11-20 11:49:41,710 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:41,710 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 [2022-11-20 11:49:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:42,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:42,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075317812] [2022-11-20 11:49:42,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075317812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:42,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:42,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:42,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227298739] [2022-11-20 11:49:42,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:42,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:42,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:42,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:42,120 INFO L87 Difference]: Start difference. First operand 842 states and 2383 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) [2022-11-20 11:49:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:42,482 INFO L93 Difference]: Finished difference Result 860 states and 2427 transitions. [2022-11-20 11:49:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:42,483 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 [2022-11-20 11:49:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:42,485 INFO L225 Difference]: With dead ends: 860 [2022-11-20 11:49:42,485 INFO L226 Difference]: Without dead ends: 860 [2022-11-20 11:49:42,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:42,486 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:42,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-20 11:49:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-20 11:49:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 836. [2022-11-20 11:49:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 809 states have (on average 2.919653893695921) internal successors, (2362), 835 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2362 transitions. [2022-11-20 11:49:42,498 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2362 transitions. Word has length 15 [2022-11-20 11:49:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:42,498 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 2362 transitions. [2022-11-20 11:49:42,498 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) [2022-11-20 11:49:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2362 transitions. [2022-11-20 11:49:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:42,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:42,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:42,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-20 11:49:42,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:42,699 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:42,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1954394470, now seen corresponding path program 3 times [2022-11-20 11:49:42,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:42,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642345891] [2022-11-20 11:49:42,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:49:42,700 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 [2022-11-20 11:49:42,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:42,701 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:42,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-20 11:49:43,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:49:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:43,223 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:43,224 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 11:49:43,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:43,302 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 [2022-11-20 11:49:43,403 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:43,404 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 [2022-11-20 11:49:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:43,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:43,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642345891] [2022-11-20 11:49:43,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642345891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:43,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:43,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:49:43,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020340572] [2022-11-20 11:49:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:43,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:49:43,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:49:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:43,712 INFO L87 Difference]: Start difference. First operand 836 states and 2362 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) [2022-11-20 11:49:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:43,960 INFO L93 Difference]: Finished difference Result 836 states and 2359 transitions. [2022-11-20 11:49:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:43,961 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 [2022-11-20 11:49:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:43,962 INFO L225 Difference]: With dead ends: 836 [2022-11-20 11:49:43,963 INFO L226 Difference]: Without dead ends: 836 [2022-11-20 11:49:43,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:49:43,963 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:43,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-20 11:49:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-20 11:49:43,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 809. [2022-11-20 11:49:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 782 states have (on average 2.942455242966752) internal successors, (2301), 808 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2301 transitions. [2022-11-20 11:49:43,973 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2301 transitions. Word has length 15 [2022-11-20 11:49:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:43,974 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 2301 transitions. [2022-11-20 11:49:43,974 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) [2022-11-20 11:49:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2301 transitions. [2022-11-20 11:49:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:43,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:43,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:43,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-20 11:49:44,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:44,175 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:44,175 INFO L85 PathProgramCache]: Analyzing trace with hash -107583371, now seen corresponding path program 1 times [2022-11-20 11:49:44,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:44,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141805645] [2022-11-20 11:49:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:44,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:44,177 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:44,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-20 11:49:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:49:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:44,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:49:44,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-20 11:49:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:44,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:44,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141805645] [2022-11-20 11:49:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141805645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:44,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:44,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:49:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316853068] [2022-11-20 11:49:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:44,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:49:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:49:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:49:44,732 INFO L87 Difference]: Start difference. First operand 809 states and 2301 transitions. Second operand has 5 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) [2022-11-20 11:49:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:45,759 INFO L93 Difference]: Finished difference Result 854 states and 2393 transitions. [2022-11-20 11:49:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:49:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2022-11-20 11:49:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:45,763 INFO L225 Difference]: With dead ends: 854 [2022-11-20 11:49:45,763 INFO L226 Difference]: Without dead ends: 854 [2022-11-20 11:49:45,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:49:45,764 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:45,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 52 Unchecked, 1.0s Time] [2022-11-20 11:49:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-11-20 11:49:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 854. [2022-11-20 11:49:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 827 states have (on average 2.893591293833132) internal successors, (2393), 853 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2393 transitions. [2022-11-20 11:49:45,803 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2393 transitions. Word has length 15 [2022-11-20 11:49:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:45,803 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 2393 transitions. [2022-11-20 11:49:45,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-11-20 11:49:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2393 transitions. [2022-11-20 11:49:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:45,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:45,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:45,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:46,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:46,007 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash -107584332, now seen corresponding path program 1 times [2022-11-20 11:49:46,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:46,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312200234] [2022-11-20 11:49:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:46,008 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 [2022-11-20 11:49:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:46,010 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:46,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-20 11:49:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:49:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:46,880 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:46,881 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 [2022-11-20 11:49:46,952 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:46,953 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 [2022-11-20 11:49:47,040 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:47,040 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 [2022-11-20 11:49:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:47,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:47,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:47,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312200234] [2022-11-20 11:49:47,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312200234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:47,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:47,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:49:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482451203] [2022-11-20 11:49:47,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:47,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:49:47,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:49:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:47,402 INFO L87 Difference]: Start difference. First operand 854 states and 2393 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) [2022-11-20 11:49:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:47,787 INFO L93 Difference]: Finished difference Result 924 states and 2546 transitions. [2022-11-20 11:49:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:49:47,788 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 15 [2022-11-20 11:49:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:47,790 INFO L225 Difference]: With dead ends: 924 [2022-11-20 11:49:47,790 INFO L226 Difference]: Without dead ends: 924 [2022-11-20 11:49:47,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:47,791 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:47,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 80 Unchecked, 0.4s Time] [2022-11-20 11:49:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-20 11:49:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 893. [2022-11-20 11:49:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 866 states have (on average 2.879907621247113) internal successors, (2494), 892 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2494 transitions. [2022-11-20 11:49:47,804 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2494 transitions. Word has length 15 [2022-11-20 11:49:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:47,804 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 2494 transitions. [2022-11-20 11:49:47,804 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) [2022-11-20 11:49:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2494 transitions. [2022-11-20 11:49:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:47,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:47,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:47,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:48,006 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash -127246392, now seen corresponding path program 2 times [2022-11-20 11:49:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905789013] [2022-11-20 11:49:48,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:48,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:48,008 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:48,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-20 11:49:48,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:48,616 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:48,616 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 [2022-11-20 11:49:48,686 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:48,686 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 [2022-11-20 11:49:48,777 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:48,777 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 [2022-11-20 11:49:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:49:49,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:49,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905789013] [2022-11-20 11:49:49,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905789013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:49,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:49,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:49:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717728032] [2022-11-20 11:49:49,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:49,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:49:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:49:49,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:49,154 INFO L87 Difference]: Start difference. First operand 893 states and 2494 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) [2022-11-20 11:49:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:49,560 INFO L93 Difference]: Finished difference Result 941 states and 2592 transitions. [2022-11-20 11:49:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:49,561 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 15 [2022-11-20 11:49:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:49,563 INFO L225 Difference]: With dead ends: 941 [2022-11-20 11:49:49,563 INFO L226 Difference]: Without dead ends: 941 [2022-11-20 11:49:49,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:49,563 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:49,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-20 11:49:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-11-20 11:49:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 899. [2022-11-20 11:49:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 872 states have (on average 2.8704128440366974) internal successors, (2503), 898 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2503 transitions. [2022-11-20 11:49:49,576 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2503 transitions. Word has length 15 [2022-11-20 11:49:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:49,576 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 2503 transitions. [2022-11-20 11:49:49,577 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) [2022-11-20 11:49:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2503 transitions. [2022-11-20 11:49:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:49:49,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:49,577 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:49,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:49,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:49,778 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 250245543, now seen corresponding path program 2 times [2022-11-20 11:49:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:49,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475948233] [2022-11-20 11:49:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:49,779 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 [2022-11-20 11:49:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:49,780 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:49,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-20 11:49:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:50,206 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 [2022-11-20 11:49:50,221 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 [2022-11-20 11:49:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:50,325 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 [2022-11-20 11:49:50,349 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:49:50,349 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 [2022-11-20 11:49:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:49:50,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:50,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:50,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475948233] [2022-11-20 11:49:50,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475948233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:50,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:50,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:49:50,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031848233] [2022-11-20 11:49:50,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:50,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:49:50,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:49:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:49:50,478 INFO L87 Difference]: Start difference. First operand 899 states and 2503 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:50,930 INFO L93 Difference]: Finished difference Result 783 states and 2128 transitions. [2022-11-20 11:49:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:49:50,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:49:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:50,932 INFO L225 Difference]: With dead ends: 783 [2022-11-20 11:49:50,932 INFO L226 Difference]: Without dead ends: 783 [2022-11-20 11:49:50,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:49:50,933 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:50,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:49:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-11-20 11:49:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 356. [2022-11-20 11:49:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 345 states have (on average 2.5855072463768116) internal successors, (892), 355 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 892 transitions. [2022-11-20 11:49:50,939 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 892 transitions. Word has length 15 [2022-11-20 11:49:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:50,939 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 892 transitions. [2022-11-20 11:49:50,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 892 transitions. [2022-11-20 11:49:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:49:50,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:50,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:50,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:51,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:51,141 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1518457035, now seen corresponding path program 1 times [2022-11-20 11:49:51,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:51,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766015600] [2022-11-20 11:49:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:51,141 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 [2022-11-20 11:49:51,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:51,142 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:51,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-20 11:49:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:49:51,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:51,917 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:51,918 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 [2022-11-20 11:49:51,992 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:51,992 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 [2022-11-20 11:49:52,085 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:52,085 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 [2022-11-20 11:49:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:52,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:52,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:52,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766015600] [2022-11-20 11:49:52,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766015600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:52,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:52,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:49:52,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001509925] [2022-11-20 11:49:52,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:52,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:49:52,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:49:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:52,470 INFO L87 Difference]: Start difference. First operand 356 states and 892 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) [2022-11-20 11:49:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:52,812 INFO L93 Difference]: Finished difference Result 370 states and 921 transitions. [2022-11-20 11:49:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:49:52,813 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 [2022-11-20 11:49:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:52,813 INFO L225 Difference]: With dead ends: 370 [2022-11-20 11:49:52,814 INFO L226 Difference]: Without dead ends: 370 [2022-11-20 11:49:52,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:52,814 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:52,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-20 11:49:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-20 11:49:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 354. [2022-11-20 11:49:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 343 states have (on average 2.58600583090379) internal successors, (887), 353 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 887 transitions. [2022-11-20 11:49:52,819 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 887 transitions. Word has length 16 [2022-11-20 11:49:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:52,820 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 887 transitions. [2022-11-20 11:49:52,820 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) [2022-11-20 11:49:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 887 transitions. [2022-11-20 11:49:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:49:52,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:52,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:52,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Ended with exit code 0 [2022-11-20 11:49:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:53,021 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1538119095, now seen corresponding path program 2 times [2022-11-20 11:49:53,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150530429] [2022-11-20 11:49:53,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:53,023 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:53,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-20 11:49:53,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:49:53,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:49:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:53,588 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:49:53,588 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 [2022-11-20 11:49:53,659 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:53,660 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 [2022-11-20 11:49:53,746 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:49:53,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-20 11:49:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:49:54,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:49:54,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:49:54,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150530429] [2022-11-20 11:49:54,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150530429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:54,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:54,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:49:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962600395] [2022-11-20 11:49:54,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:54,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:49:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:49:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:49:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:54,186 INFO L87 Difference]: Start difference. First operand 354 states and 887 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) [2022-11-20 11:49:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:54,462 INFO L93 Difference]: Finished difference Result 347 states and 872 transitions. [2022-11-20 11:49:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:49:54,462 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 [2022-11-20 11:49:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:54,463 INFO L225 Difference]: With dead ends: 347 [2022-11-20 11:49:54,463 INFO L226 Difference]: Without dead ends: 347 [2022-11-20 11:49:54,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:49:54,463 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:54,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:49:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-20 11:49:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 331. [2022-11-20 11:49:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 323 states have (on average 2.588235294117647) internal successors, (836), 330 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 836 transitions. [2022-11-20 11:49:54,467 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 836 transitions. Word has length 16 [2022-11-20 11:49:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:54,468 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 836 transitions. [2022-11-20 11:49:54,468 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) [2022-11-20 11:49:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 836 transitions. [2022-11-20 11:49:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:49:54,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:54,468 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2022-11-20 11:49:54,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-20 11:49:54,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:49:54,669 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:49:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -208960760, now seen corresponding path program 1 times [2022-11-20 11:49:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:49:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11485338] [2022-11-20 11:49:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:54,669 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 [2022-11-20 11:49:54,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:49:54,670 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:49:54,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-20 11:49:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:49:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:55,077 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 [2022-11-20 11:49:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:56,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:03,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:50:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11485338] [2022-11-20 11:50:03,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11485338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:03,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:50:03,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-20 11:50:03,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880056413] [2022-11-20 11:50:03,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:03,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:50:03,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:50:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:50:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:50:03,729 INFO L87 Difference]: Start difference. First operand 331 states and 836 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 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) [2022-11-20 11:50:25,884 WARN L233 SmtUtils]: Spent 14.37s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:50:28,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:30,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:32,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:34,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:36,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:38,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:40,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:42,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:44,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:46,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:48,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:50,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:52,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:55,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:57,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:59,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:01,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:03,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:05,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:07,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:09,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:11,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:13,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:15,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:17,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:19,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:29,634 WARN L233 SmtUtils]: Spent 8.73s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:51:40,615 WARN L233 SmtUtils]: Spent 9.35s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:51:48,337 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:52:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:31,981 INFO L93 Difference]: Finished difference Result 6653 states and 18405 transitions. [2022-11-20 11:52:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:52:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 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 17 [2022-11-20 11:52:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:31,998 INFO L225 Difference]: With dead ends: 6653 [2022-11-20 11:52:31,998 INFO L226 Difference]: Without dead ends: 6653 [2022-11-20 11:52:31,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=643, Invalid=1163, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:52:31,999 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4993 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6498 mSolverCounterSat, 519 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4993 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 6498 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:31,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4993 Valid, 0 Invalid, 7043 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [519 Valid, 6498 Invalid, 26 Unknown, 0 Unchecked, 88.6s Time] [2022-11-20 11:52:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6653 states. [2022-11-20 11:52:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6653 to 361. [2022-11-20 11:52:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 353 states have (on average 2.4957507082152977) internal successors, (881), 360 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 881 transitions. [2022-11-20 11:52:32,040 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 881 transitions. Word has length 17 [2022-11-20 11:52:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:32,040 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 881 transitions. [2022-11-20 11:52:32,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 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) [2022-11-20 11:52:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 881 transitions. [2022-11-20 11:52:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:52:32,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:32,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:32,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:52:32,242 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:52:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1404583395, now seen corresponding path program 1 times [2022-11-20 11:52:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:52:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471203464] [2022-11-20 11:52:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:32,243 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 [2022-11-20 11:52:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:52:32,244 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:52:32,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-20 11:52:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:32,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:52:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:32,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:52:32,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:52:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471203464] [2022-11-20 11:52:32,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471203464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:32,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:32,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485110497] [2022-11-20 11:52:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:52:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:52:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:52:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:52:33,000 INFO L87 Difference]: Start difference. First operand 361 states and 881 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2022-11-20 11:52:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:33,671 INFO L93 Difference]: Finished difference Result 513 states and 1231 transitions. [2022-11-20 11:52:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:52:33,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 [2022-11-20 11:52:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:33,673 INFO L225 Difference]: With dead ends: 513 [2022-11-20 11:52:33,673 INFO L226 Difference]: Without dead ends: 361 [2022-11-20 11:52:33,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:33,674 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:33,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:52:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-20 11:52:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2022-11-20 11:52:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 353 states have (on average 2.492917847025496) internal successors, (880), 360 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 880 transitions. [2022-11-20 11:52:33,679 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 880 transitions. Word has length 18 [2022-11-20 11:52:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:33,679 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 880 transitions. [2022-11-20 11:52:33,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2022-11-20 11:52:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 880 transitions. [2022-11-20 11:52:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:52:33,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:33,680 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1] [2022-11-20 11:52:33,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Ended with exit code 0 [2022-11-20 11:52:33,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:52:33,881 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:52:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash 426712704, now seen corresponding path program 2 times [2022-11-20 11:52:33,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:52:33,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654021029] [2022-11-20 11:52:33,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:52:33,881 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 [2022-11-20 11:52:33,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:52:33,883 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:52:33,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-20 11:52:34,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:52:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:52:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:34,350 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 [2022-11-20 11:52:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:35,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:43,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:52:43,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654021029] [2022-11-20 11:52:43,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654021029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:43,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:52:43,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-20 11:52:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068912369] [2022-11-20 11:52:43,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:43,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:52:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:52:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:52:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:52:43,247 INFO L87 Difference]: Start difference. First operand 361 states and 880 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:53:02,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:04,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:06,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:08,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:10,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:13,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:15,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:17,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:19,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:21,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:23,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:25,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:27,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:29,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:31,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:33,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:41,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:43,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:45,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:47,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:49,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:51,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:53,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:55,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:57,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:53:59,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:54:01,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:54:03,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:54:05,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:54:07,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:54:09,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:54:11,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:55:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:04,005 INFO L93 Difference]: Finished difference Result 4511 states and 12410 transitions. [2022-11-20 11:55:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:55:04,007 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2022-11-20 11:55:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:04,017 INFO L225 Difference]: With dead ends: 4511 [2022-11-20 11:55:04,017 INFO L226 Difference]: Without dead ends: 4511 [2022-11-20 11:55:04,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=934, Invalid=1718, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:55:04,017 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4341 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9029 mSolverCounterSat, 942 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4341 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 9029 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:04,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4341 Valid, 0 Invalid, 10003 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [942 Valid, 9029 Invalid, 32 Unknown, 0 Unchecked, 95.4s Time] [2022-11-20 11:55:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2022-11-20 11:55:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 397. [2022-11-20 11:55:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 389 states have (on average 2.4473007712082264) internal successors, (952), 396 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 952 transitions. [2022-11-20 11:55:04,048 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 952 transitions. Word has length 19 [2022-11-20 11:55:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:04,048 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 952 transitions. [2022-11-20 11:55:04,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 952 transitions. [2022-11-20 11:55:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:55:04,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:04,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:04,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:04,251 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 645846978, now seen corresponding path program 1 times [2022-11-20 11:55:04,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:04,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135841304] [2022-11-20 11:55:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:04,253 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 [2022-11-20 11:55:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:04,255 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:04,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-20 11:55:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:55:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:04,996 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 [2022-11-20 11:55:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:05,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:07,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135841304] [2022-11-20 11:55:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135841304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:07,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:55:07,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-20 11:55:07,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715438475] [2022-11-20 11:55:07,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:55:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:55:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:55:07,505 INFO L87 Difference]: Start difference. First operand 397 states and 952 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 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) [2022-11-20 11:55:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:09,786 INFO L93 Difference]: Finished difference Result 781 states and 2016 transitions. [2022-11-20 11:55:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:55:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 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 19 [2022-11-20 11:55:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:09,791 INFO L225 Difference]: With dead ends: 781 [2022-11-20 11:55:09,792 INFO L226 Difference]: Without dead ends: 781 [2022-11-20 11:55:09,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:55:09,793 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:09,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 131 Unchecked, 0.6s Time] [2022-11-20 11:55:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-20 11:55:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 629. [2022-11-20 11:55:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 621 states have (on average 2.5571658615136874) internal successors, (1588), 628 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1588 transitions. [2022-11-20 11:55:09,807 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1588 transitions. Word has length 19 [2022-11-20 11:55:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:09,808 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 1588 transitions. [2022-11-20 11:55:09,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 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) [2022-11-20 11:55:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1588 transitions. [2022-11-20 11:55:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:09,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:09,810 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:09,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:10,011 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1394871501, now seen corresponding path program 1 times [2022-11-20 11:55:10,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:10,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648095983] [2022-11-20 11:55:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:10,012 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 [2022-11-20 11:55:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:10,013 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:10,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-20 11:55:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:10,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:55:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:10,764 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 [2022-11-20 11:55:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:11,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:14,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648095983] [2022-11-20 11:55:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648095983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:14,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:55:14,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 11:55:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432835956] [2022-11-20 11:55:14,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:55:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:55:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:55:14,595 INFO L87 Difference]: Start difference. First operand 629 states and 1588 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:18,473 INFO L93 Difference]: Finished difference Result 691 states and 1739 transitions. [2022-11-20 11:55:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:55:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2022-11-20 11:55:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:18,476 INFO L225 Difference]: With dead ends: 691 [2022-11-20 11:55:18,476 INFO L226 Difference]: Without dead ends: 691 [2022-11-20 11:55:18,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:55:18,476 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:18,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2022-11-20 11:55:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-11-20 11:55:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 668. [2022-11-20 11:55:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 660 states have (on average 2.562121212121212) internal successors, (1691), 667 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1691 transitions. [2022-11-20 11:55:18,486 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1691 transitions. Word has length 20 [2022-11-20 11:55:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:18,487 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1691 transitions. [2022-11-20 11:55:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1691 transitions. [2022-11-20 11:55:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:18,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:18,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:18,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-20 11:55:18,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:18,689 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1394872462, now seen corresponding path program 1 times [2022-11-20 11:55:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:18,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448478312] [2022-11-20 11:55:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:18,690 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 [2022-11-20 11:55:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:18,691 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:18,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-20 11:55:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:19,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:55:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:19,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:19,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-20 11:55:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:55:19,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:19,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448478312] [2022-11-20 11:55:19,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448478312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:19,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:19,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:55:19,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443438436] [2022-11-20 11:55:19,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:19,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:55:19,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:55:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:19,394 INFO L87 Difference]: Start difference. First operand 668 states and 1691 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:20,220 INFO L93 Difference]: Finished difference Result 743 states and 1853 transitions. [2022-11-20 11:55:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:55:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 20 [2022-11-20 11:55:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:20,234 INFO L225 Difference]: With dead ends: 743 [2022-11-20 11:55:20,234 INFO L226 Difference]: Without dead ends: 743 [2022-11-20 11:55:20,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:20,234 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:20,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 64 Unchecked, 0.8s Time] [2022-11-20 11:55:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-11-20 11:55:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 743. [2022-11-20 11:55:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 735 states have (on average 2.52108843537415) internal successors, (1853), 742 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1853 transitions. [2022-11-20 11:55:20,244 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1853 transitions. Word has length 20 [2022-11-20 11:55:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:20,244 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1853 transitions. [2022-11-20 11:55:20,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1853 transitions. [2022-11-20 11:55:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:20,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:20,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:20,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:20,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:20,446 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1441717368, now seen corresponding path program 1 times [2022-11-20 11:55:20,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060128743] [2022-11-20 11:55:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:20,448 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 [2022-11-20 11:55:20,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:20,455 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:20,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-20 11:55:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:21,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:55:21,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:21,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:21,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-20 11:55:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:55:21,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:21,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:21,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060128743] [2022-11-20 11:55:21,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060128743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:21,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:21,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:55:21,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961112866] [2022-11-20 11:55:21,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:21,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:55:21,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:55:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:21,141 INFO L87 Difference]: Start difference. First operand 743 states and 1853 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:21,913 INFO L93 Difference]: Finished difference Result 748 states and 1861 transitions. [2022-11-20 11:55:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:55:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 20 [2022-11-20 11:55:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:21,916 INFO L225 Difference]: With dead ends: 748 [2022-11-20 11:55:21,916 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 11:55:21,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:21,917 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:21,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-11-20 11:55:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 11:55:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 743. [2022-11-20 11:55:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 735 states have (on average 2.52108843537415) internal successors, (1853), 742 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1853 transitions. [2022-11-20 11:55:21,928 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1853 transitions. Word has length 20 [2022-11-20 11:55:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:21,929 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1853 transitions. [2022-11-20 11:55:21,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1853 transitions. [2022-11-20 11:55:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:21,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:21,930 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:21,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:22,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:22,130 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:22,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1278255112, now seen corresponding path program 2 times [2022-11-20 11:55:22,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:22,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492494514] [2022-11-20 11:55:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:55:22,131 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 [2022-11-20 11:55:22,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:22,132 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:22,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-20 11:55:22,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:55:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:55:22,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:22,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:22,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-20 11:55:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:55:22,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:22,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492494514] [2022-11-20 11:55:22,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492494514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:22,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:22,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:55:22,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810215749] [2022-11-20 11:55:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:22,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:55:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:55:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:22,782 INFO L87 Difference]: Start difference. First operand 743 states and 1853 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:23,618 INFO L93 Difference]: Finished difference Result 764 states and 1900 transitions. [2022-11-20 11:55:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:55:23,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 20 [2022-11-20 11:55:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:23,621 INFO L225 Difference]: With dead ends: 764 [2022-11-20 11:55:23,621 INFO L226 Difference]: Without dead ends: 764 [2022-11-20 11:55:23,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:23,621 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:23,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 69 Unchecked, 0.8s Time] [2022-11-20 11:55:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-20 11:55:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 743. [2022-11-20 11:55:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 735 states have (on average 2.52108843537415) internal successors, (1853), 742 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1853 transitions. [2022-11-20 11:55:23,632 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1853 transitions. Word has length 20 [2022-11-20 11:55:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:23,632 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1853 transitions. [2022-11-20 11:55:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1853 transitions. [2022-11-20 11:55:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:23,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:23,633 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:23,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:23,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:23,833 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash 587159472, now seen corresponding path program 2 times [2022-11-20 11:55:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348878472] [2022-11-20 11:55:23,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:55:23,834 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 [2022-11-20 11:55:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:23,835 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:23,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-20 11:55:24,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:55:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:55:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:24,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:24,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-20 11:55:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:55:24,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:24,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:24,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348878472] [2022-11-20 11:55:24,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348878472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:24,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:24,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:55:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960403611] [2022-11-20 11:55:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:24,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:55:24,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:55:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:24,478 INFO L87 Difference]: Start difference. First operand 743 states and 1853 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:25,290 INFO L93 Difference]: Finished difference Result 751 states and 1870 transitions. [2022-11-20 11:55:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:55:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 20 [2022-11-20 11:55:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:25,294 INFO L225 Difference]: With dead ends: 751 [2022-11-20 11:55:25,294 INFO L226 Difference]: Without dead ends: 751 [2022-11-20 11:55:25,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:25,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:25,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 63 Unchecked, 0.8s Time] [2022-11-20 11:55:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-20 11:55:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 746. [2022-11-20 11:55:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 738 states have (on average 2.5230352303523036) internal successors, (1862), 745 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1862 transitions. [2022-11-20 11:55:25,308 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1862 transitions. Word has length 20 [2022-11-20 11:55:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:25,308 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1862 transitions. [2022-11-20 11:55:25,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1862 transitions. [2022-11-20 11:55:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:25,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:25,310 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:25,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-20 11:55:25,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:25,510 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 587049732, now seen corresponding path program 3 times [2022-11-20 11:55:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:25,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126867816] [2022-11-20 11:55:25,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:55:25,512 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 [2022-11-20 11:55:25,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:25,513 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:25,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-20 11:55:26,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:55:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:55:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:26,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:55:26,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-20 11:55:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:55:26,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:26,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126867816] [2022-11-20 11:55:26,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126867816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:26,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:26,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:55:26,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821830051] [2022-11-20 11:55:26,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:26,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:55:26,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:26,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:55:26,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:26,176 INFO L87 Difference]: Start difference. First operand 746 states and 1862 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:26,996 INFO L93 Difference]: Finished difference Result 749 states and 1868 transitions. [2022-11-20 11:55:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:55:26,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 20 [2022-11-20 11:55:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:27,000 INFO L225 Difference]: With dead ends: 749 [2022-11-20 11:55:27,000 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 11:55:27,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:27,001 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:27,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 46 Unchecked, 0.8s Time] [2022-11-20 11:55:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 11:55:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2022-11-20 11:55:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 735 states have (on average 2.52108843537415) internal successors, (1853), 742 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1853 transitions. [2022-11-20 11:55:27,012 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1853 transitions. Word has length 20 [2022-11-20 11:55:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:27,012 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1853 transitions. [2022-11-20 11:55:27,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-20 11:55:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1853 transitions. [2022-11-20 11:55:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:27,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:27,014 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:27,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:27,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:27,214 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1530682688, now seen corresponding path program 4 times [2022-11-20 11:55:27,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:27,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906621626] [2022-11-20 11:55:27,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:55:27,215 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 [2022-11-20 11:55:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:27,216 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:27,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-20 11:55:27,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:55:27,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:55:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:27,995 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 [2022-11-20 11:55:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:55:31,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:31,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906621626] [2022-11-20 11:55:31,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906621626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:31,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:55:31,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 11:55:31,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777490568] [2022-11-20 11:55:31,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:31,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:55:31,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:55:31,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:55:31,066 INFO L87 Difference]: Start difference. First operand 743 states and 1853 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:34,880 INFO L93 Difference]: Finished difference Result 797 states and 1984 transitions. [2022-11-20 11:55:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:55:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2022-11-20 11:55:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:34,882 INFO L225 Difference]: With dead ends: 797 [2022-11-20 11:55:34,883 INFO L226 Difference]: Without dead ends: 797 [2022-11-20 11:55:34,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:55:34,883 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:34,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2022-11-20 11:55:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-20 11:55:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 776. [2022-11-20 11:55:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 768 states have (on average 2.5182291666666665) internal successors, (1934), 775 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1934 transitions. [2022-11-20 11:55:34,893 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1934 transitions. Word has length 20 [2022-11-20 11:55:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:34,894 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1934 transitions. [2022-11-20 11:55:34,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1934 transitions. [2022-11-20 11:55:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:55:34,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:34,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:34,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:35,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:35,095 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 938616402, now seen corresponding path program 3 times [2022-11-20 11:55:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874428297] [2022-11-20 11:55:35,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:55:35,096 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 [2022-11-20 11:55:35,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:35,097 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:35,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-20 11:55:35,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:55:35,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:55:35,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:35,598 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 [2022-11-20 11:55:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:55:35,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:35,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874428297] [2022-11-20 11:55:35,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874428297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:35,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:35,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469189494] [2022-11-20 11:55:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:35,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:55:35,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:55:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:55:35,847 INFO L87 Difference]: Start difference. First operand 776 states and 1934 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) [2022-11-20 11:55:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:36,292 INFO L93 Difference]: Finished difference Result 725 states and 1767 transitions. [2022-11-20 11:55:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:55:36,294 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 20 [2022-11-20 11:55:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:36,295 INFO L225 Difference]: With dead ends: 725 [2022-11-20 11:55:36,295 INFO L226 Difference]: Without dead ends: 725 [2022-11-20 11:55:36,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:55:36,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:36,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:55:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-20 11:55:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 378. [2022-11-20 11:55:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 374 states have (on average 2.2887700534759357) internal successors, (856), 377 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 856 transitions. [2022-11-20 11:55:36,302 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 856 transitions. Word has length 20 [2022-11-20 11:55:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:36,302 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 856 transitions. [2022-11-20 11:55:36,302 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) [2022-11-20 11:55:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 856 transitions. [2022-11-20 11:55:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:55:36,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:36,303 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-20 11:55:36,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-20 11:55:36,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:36,503 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2022-11-20 11:55:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash -617380463, now seen corresponding path program 4 times [2022-11-20 11:55:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:36,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699386665] [2022-11-20 11:55:36,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:55:36,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:36,505 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:55:36,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26c725f-0997-40d7-b7e7-2010c6c53f57/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-20 11:55:37,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:55:37,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:55:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:55:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:37,269 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:55:37,269 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 [2022-11-20 11:55:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:39,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:56,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699386665] [2022-11-20 11:55:56,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699386665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:56,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:55:56,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-20 11:55:56,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361742229] [2022-11-20 11:55:56,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:56,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:55:56,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:55:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:55:56,108 INFO L87 Difference]: Start difference. First operand 378 states and 856 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)