./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- 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-b5237d8 [2022-11-22 00:32:46,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:32:46,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:32:46,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:32:46,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:32:46,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:32:46,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:32:46,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:32:46,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:32:46,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:32:46,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:32:46,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:32:46,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:32:46,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:32:46,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:32:46,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:32:46,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:32:46,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:32:46,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:32:46,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:32:46,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:32:46,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:32:46,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:32:46,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:32:46,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:32:46,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:32:46,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:32:46,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:32:46,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:32:46,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:32:46,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:32:46,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:32:46,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:32:46,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:32:46,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:32:46,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:32:46,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:32:46,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:32:46,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:32:46,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:32:46,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:32:46,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 00:32:46,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:32:46,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:32:46,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:32:46,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:32:46,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:32:46,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:32:46,438 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:32:46,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:32:46,438 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:32:46,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:32:46,439 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:32:46,440 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:32:46,440 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:32:46,440 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:32:46,440 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:32:46,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:32:46,441 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:32:46,441 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:32:46,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:32:46,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:32:46,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:32:46,443 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:32:46,443 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:32:46,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:32:46,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:32:46,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:32:46,444 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:32:46,445 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:32:46,445 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:32:46,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:32:46,445 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:32:46,445 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:32:46,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:32:46,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:32:46,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:32:46,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:32:46,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:32:46,447 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:32:46,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:32:46,447 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:32:46,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:32:46,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:32:46,447 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_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2022-11-22 00:32:46,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:32:46,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:32:46,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:32:46,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:32:46,767 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:32:46,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-22 00:32:49,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:32:50,254 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:32:50,257 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-22 00:32:50,273 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data/1ffa76190/46ee7386af49439d982b28aef4a3d86c/FLAG3f2341585 [2022-11-22 00:32:50,297 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data/1ffa76190/46ee7386af49439d982b28aef4a3d86c [2022-11-22 00:32:50,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:32:50,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:32:50,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:50,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:32:50,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:32:50,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:50" (1/1) ... [2022-11-22 00:32:50,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db708f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:50, skipping insertion in model container [2022-11-22 00:32:50,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:50" (1/1) ... [2022-11-22 00:32:50,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:32:50,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:32:50,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:50,699 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) [2022-11-22 00:32:50,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@724e91e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:50, skipping insertion in model container [2022-11-22 00:32:50,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:50,700 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 00:32:50,702 INFO L158 Benchmark]: Toolchain (without parser) took 398.92ms. Allocated memory is still 136.3MB. Free memory was 92.0MB in the beginning and 80.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 00:32:50,703 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 00:32:50,704 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.41ms. Allocated memory is still 136.3MB. Free memory was 92.0MB in the beginning and 80.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 00:32:50,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 109.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.41ms. Allocated memory is still 136.3MB. Free memory was 92.0MB in the beginning and 80.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- 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-b5237d8 [2022-11-22 00:32:53,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:32:53,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:32:53,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:32:53,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:32:53,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:32:53,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:32:53,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:32:53,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:32:53,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:32:53,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:32:53,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:32:53,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:32:53,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:32:53,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:32:53,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:32:53,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:32:53,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:32:53,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:32:53,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:32:53,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:32:53,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:32:53,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:32:53,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:32:53,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:32:53,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:32:53,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:32:53,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:32:53,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:32:53,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:32:53,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:32:53,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:32:53,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:32:53,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:32:53,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:32:53,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:32:53,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:32:53,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:32:53,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:32:53,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:32:53,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:32:53,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 00:32:53,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:32:53,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:32:53,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:32:53,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:32:53,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:32:53,323 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:32:53,323 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:32:53,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:32:53,323 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:32:53,323 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:32:53,324 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:32:53,324 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:32:53,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:32:53,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:32:53,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:32:53,325 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:32:53,325 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:32:53,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:32:53,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:32:53,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:32:53,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:32:53,330 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:32:53,330 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:32:53,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:32:53,331 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:32:53,331 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 00:32:53,331 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 00:32:53,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:32:53,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:32:53,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:32:53,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 00:32:53,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:32:53,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:32:53,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:32:53,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:32:53,334 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 00:32:53,335 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 00:32:53,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:32:53,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 00:32:53,336 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_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2022-11-22 00:32:53,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:32:53,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:32:53,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:32:53,884 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:32:53,884 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:32:53,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-22 00:32:57,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:32:57,366 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:32:57,382 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-22 00:32:57,401 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data/3e12d6f7a/b388ba1e47d34bcba69a580ab29dd713/FLAG3928311f8 [2022-11-22 00:32:57,420 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/data/3e12d6f7a/b388ba1e47d34bcba69a580ab29dd713 [2022-11-22 00:32:57,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:32:57,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:32:57,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:57,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:32:57,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:32:57,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:57" (1/1) ... [2022-11-22 00:32:57,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c5decc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:57, skipping insertion in model container [2022-11-22 00:32:57,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:57" (1/1) ... [2022-11-22 00:32:57,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:32:57,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:32:57,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:57,968 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 00:32:57,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:32:57,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:58,002 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:32:58,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:58,086 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:32:58,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58 WrapperNode [2022-11-22 00:32:58,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:58,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:32:58,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:32:58,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:32:58,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,142 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-22 00:32:58,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:32:58,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:32:58,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:32:58,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:32:58,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,174 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:32:58,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:32:58,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:32:58,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:32:58,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (1/1) ... [2022-11-22 00:32:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:32:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:58,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:32:58,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:32:58,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 00:32:58,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:32:58,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:32:58,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 00:32:58,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:32:58,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:32:58,487 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:32:58,489 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:32:58,835 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:32:58,842 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:32:58,843 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 00:32:58,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:32:58 BoogieIcfgContainer [2022-11-22 00:32:58,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:32:58,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:32:58,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:32:58,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:32:58,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:32:57" (1/3) ... [2022-11-22 00:32:58,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60917ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:32:58, skipping insertion in model container [2022-11-22 00:32:58,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:58" (2/3) ... [2022-11-22 00:32:58,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60917ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:32:58, skipping insertion in model container [2022-11-22 00:32:58,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:32:58" (3/3) ... [2022-11-22 00:32:58,855 INFO L112 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2022-11-22 00:32:58,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:32:58,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-22 00:32:58,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:32:58,941 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;@12255417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:32:58,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-22 00:32:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 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) [2022-11-22 00:32:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:32:58,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:58,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:32:58,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:32:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-22 00:32:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:32:58,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728729469] [2022-11-22 00:32:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:58,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:32:58,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:32:58,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:32:58,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:32:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:32:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:59,181 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 [2022-11-22 00:32:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:59,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:59,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:32:59,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728729469] [2022-11-22 00:32:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728729469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:59,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:32:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:32:59,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13626499] [2022-11-22 00:32:59,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:59,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:32:59,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:32:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:32:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:32:59,265 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 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) Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-22 00:32:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:59,355 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-22 00:32:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:32:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-22 00:32:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:59,375 INFO L225 Difference]: With dead ends: 30 [2022-11-22 00:32:59,375 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 00:32:59,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:32:59,385 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:59,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:32:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 00:32:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-22 00:32:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-22 00:32:59,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2022-11-22 00:32:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:59,431 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-22 00:32:59,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-22 00:32:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-22 00:32:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:32:59,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:59,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:32:59,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:32:59,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:32:59,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:32:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-11-22 00:32:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:32:59,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039421742] [2022-11-22 00:32:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:59,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:32:59,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:32:59,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:32:59,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:32:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:32:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:59,809 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 5 [2022-11-22 00:32:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:59,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:59,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:32:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039421742] [2022-11-22 00:32:59,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039421742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:59,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:32:59,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:32:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506411721] [2022-11-22 00:32:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:59,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:32:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:32:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:32:59,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:32:59,875 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:00,141 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-22 00:33:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:33:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 00:33:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:00,144 INFO L225 Difference]: With dead ends: 57 [2022-11-22 00:33:00,144 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 00:33:00,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:00,146 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:00,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:33:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 00:33:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2022-11-22 00:33:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 30 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) [2022-11-22 00:33:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-22 00:33:00,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-11-22 00:33:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:00,156 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-22 00:33:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-22 00:33:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:33:00,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:00,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:33:00,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:00,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:00,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-22 00:33:00,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:00,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952901651] [2022-11-22 00:33:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:00,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:00,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:00,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:00,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 00:33:00,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:00,535 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 [2022-11-22 00:33:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:00,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:00,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:00,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952901651] [2022-11-22 00:33:00,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952901651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:00,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:00,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:33:00,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419422706] [2022-11-22 00:33:00,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:00,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:33:00,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:00,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:33:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:33:00,671 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:00,845 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-22 00:33:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:33:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 00:33:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:00,848 INFO L225 Difference]: With dead ends: 35 [2022-11-22 00:33:00,848 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 00:33:00,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:00,849 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:00,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 00:33:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-22 00:33:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-22 00:33:00,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2022-11-22 00:33:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:00,856 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-22 00:33:00,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-22 00:33:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 00:33:00,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:00,857 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:00,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:01,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:01,069 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-11-22 00:33:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833180404] [2022-11-22 00:33:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:01,070 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 [2022-11-22 00:33:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:01,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:33:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:01,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:01,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833180404] [2022-11-22 00:33:01,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833180404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1129706062] [2022-11-22 00:33:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:01,323 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:01,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:01,326 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:01,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-22 00:33:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:33:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:01,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:01,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1129706062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:01,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488806144] [2022-11-22 00:33:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:01,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:01,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:01,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:01,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:33:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:33:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:01,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488806144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:01,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:33:01,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-22 00:33:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478176035] [2022-11-22 00:33:01,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:01,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:33:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:33:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:33:01,706 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:01,794 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-22 00:33:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:33:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 00:33:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:01,797 INFO L225 Difference]: With dead ends: 55 [2022-11-22 00:33:01,797 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 00:33:01,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:33:01,798 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 109 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:01,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 115 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 00:33:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2022-11-22 00:33:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-22 00:33:01,807 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 10 [2022-11-22 00:33:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:01,808 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-22 00:33:01,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-22 00:33:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 00:33:01,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:01,809 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:01,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:02,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:02,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:02,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:02,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:02,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-22 00:33:02,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:02,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217053680] [2022-11-22 00:33:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:02,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:33:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:02,513 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 [2022-11-22 00:33:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:02,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:03,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:03,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217053680] [2022-11-22 00:33:03,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217053680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:03,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709303060] [2022-11-22 00:33:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:03,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:03,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:03,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-22 00:33:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:33:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:03,500 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 [2022-11-22 00:33:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:03,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:03,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709303060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:03,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874551975] [2022-11-22 00:33:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:03,907 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:03,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:33:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:03,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:33:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:04,023 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 [2022-11-22 00:33:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:04,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:04,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874551975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:04,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:33:04,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-22 00:33:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754976343] [2022-11-22 00:33:04,334 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:04,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:33:04,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:33:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:33:04,339 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:05,569 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-11-22 00:33:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:33:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 00:33:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:05,580 INFO L225 Difference]: With dead ends: 86 [2022-11-22 00:33:05,581 INFO L226 Difference]: Without dead ends: 86 [2022-11-22 00:33:05,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-22 00:33:05,582 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 341 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:05,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 106 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:33:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-22 00:33:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2022-11-22 00:33:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.35) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-22 00:33:05,588 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 10 [2022-11-22 00:33:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:05,589 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-22 00:33:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-22 00:33:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:33:05,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:05,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:05,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:05,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:05,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:06,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:06,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -680998148, now seen corresponding path program 1 times [2022-11-22 00:33:06,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:06,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912621406] [2022-11-22 00:33:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:06,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:06,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:06,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:06,265 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 [2022-11-22 00:33:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:06,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:06,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:06,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912621406] [2022-11-22 00:33:06,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912621406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:06,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:06,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:33:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3443800] [2022-11-22 00:33:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:06,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:33:06,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:33:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:33:06,312 INFO L87 Difference]: Start difference. First operand 48 states and 54 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) [2022-11-22 00:33:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:06,392 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-11-22 00:33:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:33:06,393 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 [2022-11-22 00:33:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:06,395 INFO L225 Difference]: With dead ends: 45 [2022-11-22 00:33:06,395 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 00:33:06,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:06,396 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:06,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 00:33:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-22 00:33:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-22 00:33:06,401 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 12 [2022-11-22 00:33:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:06,401 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-22 00:33:06,401 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) [2022-11-22 00:33:06,401 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-22 00:33:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:33:06,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:06,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:06,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:06,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:06,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2022-11-22 00:33:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:06,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629530253] [2022-11-22 00:33:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:06,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:06,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:06,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:06,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:33:06,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:06,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:33:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:06,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:06,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629530253] [2022-11-22 00:33:06,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629530253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:06,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:06,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:33:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932990265] [2022-11-22 00:33:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:33:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:33:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:06,793 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:07,015 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-11-22 00:33:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:33:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 00:33:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:07,017 INFO L225 Difference]: With dead ends: 73 [2022-11-22 00:33:07,017 INFO L226 Difference]: Without dead ends: 73 [2022-11-22 00:33:07,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:33:07,018 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:07,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 75 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:33:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-22 00:33:07,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-11-22 00:33:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-22 00:33:07,030 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2022-11-22 00:33:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:07,031 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-22 00:33:07,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-22 00:33:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:33:07,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:07,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:07,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:07,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:07,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:07,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2022-11-22 00:33:07,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:07,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881762476] [2022-11-22 00:33:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:07,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:07,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:07,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:33:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:07,331 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 [2022-11-22 00:33:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:07,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:07,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881762476] [2022-11-22 00:33:07,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881762476] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:07,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:33:07,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-22 00:33:07,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801783014] [2022-11-22 00:33:07,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:07,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:33:07,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:33:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:33:07,942 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:08,194 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-11-22 00:33:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:33:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 00:33:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:08,196 INFO L225 Difference]: With dead ends: 57 [2022-11-22 00:33:08,196 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 00:33:08,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:33:08,197 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:08,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:33:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 00:33:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2022-11-22 00:33:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-22 00:33:08,203 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 12 [2022-11-22 00:33:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:08,203 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-22 00:33:08,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-22 00:33:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 00:33:08,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:08,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:08,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:08,405 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2022-11-22 00:33:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:08,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582948297] [2022-11-22 00:33:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:08,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:08,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:33:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:08,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:08,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:08,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582948297] [2022-11-22 00:33:08,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582948297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:08,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:08,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:33:08,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088326721] [2022-11-22 00:33:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:33:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:33:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:33:08,503 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 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) [2022-11-22 00:33:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:08,605 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-11-22 00:33:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:33:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-22 00:33:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:08,608 INFO L225 Difference]: With dead ends: 68 [2022-11-22 00:33:08,608 INFO L226 Difference]: Without dead ends: 68 [2022-11-22 00:33:08,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:33:08,609 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:08,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 62 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:08,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-22 00:33:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2022-11-22 00:33:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-22 00:33:08,613 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 14 [2022-11-22 00:33:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:08,613 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-22 00:33:08,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-22 00:33:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-22 00:33:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 00:33:08,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:08,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:08,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:08,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:08,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1346062156, now seen corresponding path program 1 times [2022-11-22 00:33:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:08,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028950796] [2022-11-22 00:33:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:08,828 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 [2022-11-22 00:33:08,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:08,829 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:08,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:08,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 00:33:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:09,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:09,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028950796] [2022-11-22 00:33:09,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028950796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238169860] [2022-11-22 00:33:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:09,180 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:09,182 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:09,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-22 00:33:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:09,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 00:33:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:09,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:09,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [238169860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178245932] [2022-11-22 00:33:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:09,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:09,411 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:09,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:33:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:09,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:09,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:09,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178245932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:09,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-22 00:33:09,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6, 7, 6] total 12 [2022-11-22 00:33:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113962391] [2022-11-22 00:33:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:33:09,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:09,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:33:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:33:09,554 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 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) [2022-11-22 00:33:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:09,644 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-11-22 00:33:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:33:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-22 00:33:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:09,646 INFO L225 Difference]: With dead ends: 54 [2022-11-22 00:33:09,646 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 00:33:09,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:33:09,647 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:09,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 00:33:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-11-22 00:33:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-22 00:33:09,650 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 14 [2022-11-22 00:33:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:09,650 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-22 00:33:09,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-22 00:33:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-22 00:33:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:33:09,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:09,651 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:09,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:09,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:10,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:10,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2022-11-22 00:33:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434739349] [2022-11-22 00:33:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:10,258 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:10,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:10,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:10,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:10,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434739349] [2022-11-22 00:33:10,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434739349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:10,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985586295] [2022-11-22 00:33:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:10,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:10,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:10,478 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:10,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-22 00:33:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:10,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:10,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [985586295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481040429] [2022-11-22 00:33:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:10,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:10,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:10,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 00:33:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:10,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:10,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481040429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:10,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:33:10,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-22 00:33:10,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973755833] [2022-11-22 00:33:10,851 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:10,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:33:10,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:10,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:33:10,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:33:10,852 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:10,984 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-22 00:33:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:33:10,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 00:33:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:10,986 INFO L225 Difference]: With dead ends: 59 [2022-11-22 00:33:10,986 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 00:33:10,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:33:10,987 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:10,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:33:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 00:33:10,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-22 00:33:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-11-22 00:33:10,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 16 [2022-11-22 00:33:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:10,992 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-11-22 00:33:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-11-22 00:33:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:33:10,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:10,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:11,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:11,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:11,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:11,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:11,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2022-11-22 00:33:11,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:11,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824850667] [2022-11-22 00:33:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:11,605 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:11,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:33:11,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:11,691 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 [2022-11-22 00:33:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:11,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:33:12,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824850667] [2022-11-22 00:33:12,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824850667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357342189] [2022-11-22 00:33:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:12,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:12,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-22 00:33:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 00:33:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:13,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:13,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357342189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491970663] [2022-11-22 00:33:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:13,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:13,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:13,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:13,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 00:33:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 00:33:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:13,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:13,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491970663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:13,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:33:13,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 8, 7] total 23 [2022-11-22 00:33:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678089413] [2022-11-22 00:33:13,600 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:13,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 00:33:13,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:13,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 00:33:13,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:33:13,601 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:16,455 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2022-11-22 00:33:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 00:33:16,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2022-11-22 00:33:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:16,458 INFO L225 Difference]: With dead ends: 104 [2022-11-22 00:33:16,458 INFO L226 Difference]: Without dead ends: 104 [2022-11-22 00:33:16,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=348, Invalid=1374, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 00:33:16,460 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 533 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:16,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 132 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:33:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-22 00:33:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-11-22 00:33:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-22 00:33:16,465 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 16 [2022-11-22 00:33:16,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:16,465 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-22 00:33:16,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-22 00:33:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 00:33:16,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:16,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:16,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:16,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:16,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-22 00:33:17,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:17,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2022-11-22 00:33:17,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259186594] [2022-11-22 00:33:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:17,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:17,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:17,070 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:17,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:33:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:17,310 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc8#1.base_20| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc8#1.base_20| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc8#1.base_20|) (_ bv0 1)))) is different from true [2022-11-22 00:33:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:33:17,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:33:17,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:17,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259186594] [2022-11-22 00:33:17,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259186594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:17,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:33:17,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:33:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252439918] [2022-11-22 00:33:17,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:17,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:33:17,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:33:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-22 00:33:17,313 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-22 00:33:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:17,373 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-11-22 00:33:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:33:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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 [2022-11-22 00:33:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:17,373 INFO L225 Difference]: With dead ends: 78 [2022-11-22 00:33:17,373 INFO L226 Difference]: Without dead ends: 59 [2022-11-22 00:33:17,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-22 00:33:17,374 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:17,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-11-22 00:33:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-22 00:33:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-22 00:33:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-22 00:33:17,392 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 18 [2022-11-22 00:33:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:17,392 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-22 00:33:17,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 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) [2022-11-22 00:33:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-22 00:33:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 00:33:17,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:17,394 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:33:17,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:17,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:17,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2022-11-22 00:33:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:17,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211819951] [2022-11-22 00:33:17,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 00:33:17,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:17,605 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:17,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:17,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 00:33:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:33:17,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:17,717 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 [2022-11-22 00:33:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:19,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211819951] [2022-11-22 00:33:19,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211819951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882990715] [2022-11-22 00:33:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 00:33:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:19,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:19,905 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:19,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-22 00:33:20,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 00:33:20,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:20,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 00:33:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:20,055 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 [2022-11-22 00:33:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:20,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:21,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882990715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:21,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515407616] [2022-11-22 00:33:21,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 00:33:21,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:21,039 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:21,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 00:33:21,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 00:33:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:33:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:21,147 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:33:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:21,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:23,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515407616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:23,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:33:23,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 25 [2022-11-22 00:33:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635573750] [2022-11-22 00:33:23,793 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 00:33:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 00:33:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2022-11-22 00:33:23,795 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:27,518 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 [] [2022-11-22 00:33:29,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:33:31,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:33:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:33,974 INFO L93 Difference]: Finished difference Result 335 states and 376 transitions. [2022-11-22 00:33:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 00:33:33,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 00:33:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:33,977 INFO L225 Difference]: With dead ends: 335 [2022-11-22 00:33:33,977 INFO L226 Difference]: Without dead ends: 335 [2022-11-22 00:33:33,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 00:33:33,978 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 619 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:33,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 260 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 380 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-22 00:33:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-22 00:33:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 83. [2022-11-22 00:33:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-22 00:33:33,985 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 22 [2022-11-22 00:33:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:33,986 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-22 00:33:33,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-22 00:33:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 00:33:33,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:33,987 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:33,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:34,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:34,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-22 00:33:34,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:34,595 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2021775754, now seen corresponding path program 2 times [2022-11-22 00:33:34,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357517365] [2022-11-22 00:33:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 00:33:34,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:34,598 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:34,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:34,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 00:33:34,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:33:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:34,711 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 [2022-11-22 00:33:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:35,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:37,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:33:37,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357517365] [2022-11-22 00:33:37,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357517365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:37,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1732683378] [2022-11-22 00:33:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 00:33:37,730 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:33:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:33:37,732 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:33:37,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-22 00:33:37,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 00:33:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:33:37,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:33:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:33:40,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1732683378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:40,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424005807] [2022-11-22 00:33:40,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 00:33:40,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:40,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:40,056 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 00:33:40,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 00:33:40,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 00:33:40,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:40,197 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 [2022-11-22 00:33:41,125 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 17 treesize of output 13 [2022-11-22 00:33:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:33:41,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:33:44,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424005807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:44,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:33:44,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 12, 12] total 51 [2022-11-22 00:33:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876937921] [2022-11-22 00:33:44,437 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:33:44,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-22 00:33:44,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:33:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-22 00:33:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2243, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 00:33:44,440 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:56,749 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2022-11-22 00:33:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 00:33:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-22 00:33:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:56,750 INFO L225 Difference]: With dead ends: 154 [2022-11-22 00:33:56,750 INFO L226 Difference]: Without dead ends: 136 [2022-11-22 00:33:56,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=755, Invalid=4357, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 00:33:56,753 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 434 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:56,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 438 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 00:33:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-22 00:33:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 92. [2022-11-22 00:33:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-11-22 00:33:56,758 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 32 [2022-11-22 00:33:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:56,759 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-11-22 00:33:56,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-11-22 00:33:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 00:33:56,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:56,760 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:56,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:56,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:57,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 00:33:57,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:57,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:33:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:57,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1584580368, now seen corresponding path program 3 times [2022-11-22 00:33:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:33:57,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477509793] [2022-11-22 00:33:57,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:33:57,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:33:57,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:33:57,371 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:33:57,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:33:57,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 00:33:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:33:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 00:33:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:57,572 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 [2022-11-22 00:33:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:33:58,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:34:00,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:34:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477509793] [2022-11-22 00:34:00,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477509793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944865068] [2022-11-22 00:34:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:34:00,518 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:34:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:34:00,519 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:34:00,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-22 00:34:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 00:34:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:34:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 00:34:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:01,138 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 [2022-11-22 00:34:02,566 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 17 treesize of output 13 [2022-11-22 00:34:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:34:02,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:34:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1944865068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168845874] [2022-11-22 00:34:09,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:34:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:09,484 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:09,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 00:34:09,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 00:34:09,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:34:09,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 00:34:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:09,723 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 [2022-11-22 00:34:10,230 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 17 treesize of output 13 [2022-11-22 00:34:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:34:10,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:34:18,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168845874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:18,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:34:18,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 16, 17, 16, 17] total 59 [2022-11-22 00:34:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149499391] [2022-11-22 00:34:18,793 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:34:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-22 00:34:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:34:18,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-22 00:34:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3048, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 00:34:18,796 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 59 states, 59 states have (on average 2.6610169491525424) internal successors, (157), 59 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:35:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:24,485 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2022-11-22 00:35:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-22 00:35:24,488 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.6610169491525424) internal successors, (157), 59 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-22 00:35:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:24,489 INFO L225 Difference]: With dead ends: 205 [2022-11-22 00:35:24,489 INFO L226 Difference]: Without dead ends: 137 [2022-11-22 00:35:24,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=1762, Invalid=7940, Unknown=0, NotChecked=0, Total=9702 [2022-11-22 00:35:24,494 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2601 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2601 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:24,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2601 Valid, 1027 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-22 00:35:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-22 00:35:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2022-11-22 00:35:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 130 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:35:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2022-11-22 00:35:24,502 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 40 [2022-11-22 00:35:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:24,503 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2022-11-22 00:35:24,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.6610169491525424) internal successors, (157), 59 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:35:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2022-11-22 00:35:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 00:35:24,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:24,505 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-22 00:35:24,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:35:24,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-22 00:35:24,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-22 00:35:25,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:25,121 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:35:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2022-11-22 00:35:25,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:35:25,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788924052] [2022-11-22 00:35:25,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:35:25,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:35:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:35:25,124 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:35:25,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:35:25,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-22 00:35:25,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:35:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 00:35:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:25,454 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 [2022-11-22 00:35:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:31,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:35:31,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788924052] [2022-11-22 00:35:31,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788924052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:31,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1298331235] [2022-11-22 00:35:31,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:35:31,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:35:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:35:31,035 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:35:31,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-22 00:35:32,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-22 00:35:32,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:35:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 00:35:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:33,033 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 [2022-11-22 00:35:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:34,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:46,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1298331235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:46,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533202546] [2022-11-22 00:35:46,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:35:46,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:46,943 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:46,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-22 00:35:50,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-22 00:35:50,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:35:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:35:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:50,708 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 [2022-11-22 00:35:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:51,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533202546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:58,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:35:58,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21, 21, 19, 19] total 68 [2022-11-22 00:35:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120177393] [2022-11-22 00:35:58,194 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:35:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-22 00:35:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:35:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-22 00:35:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1266, Invalid=3426, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 00:35:58,197 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand has 69 states, 68 states have (on average 2.9411764705882355) internal successors, (200), 69 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:36:08,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:10,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:12,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:14,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:16,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:18,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:20,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:26,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:28,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:30,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:32,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:34,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:36,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:38,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:44,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:46,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:48,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:50,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:52,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:36:54,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 00:37:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:14,714 INFO L93 Difference]: Finished difference Result 1523 states and 1711 transitions. [2022-11-22 00:37:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-22 00:37:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.9411764705882355) internal successors, (200), 69 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-22 00:37:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:14,722 INFO L225 Difference]: With dead ends: 1523 [2022-11-22 00:37:14,722 INFO L226 Difference]: Without dead ends: 1523 [2022-11-22 00:37:14,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3460 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=2566, Invalid=6364, Unknown=0, NotChecked=0, Total=8930 [2022-11-22 00:37:14,725 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2464 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 106 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2464 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:14,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2464 Valid, 1150 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1717 Invalid, 19 Unknown, 0 Unchecked, 45.4s Time] [2022-11-22 00:37:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-11-22 00:37:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 179. [2022-11-22 00:37:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.1694915254237288) internal successors, (207), 178 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:37:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2022-11-22 00:37:14,739 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 46 [2022-11-22 00:37:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:14,739 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2022-11-22 00:37:14,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.9411764705882355) internal successors, (200), 69 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:37:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2022-11-22 00:37:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 00:37:14,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:14,742 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:37:14,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-22 00:37:14,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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)] Ended with exit code 0 [2022-11-22 00:37:15,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-22 00:37:15,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 00:37:15,354 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:37:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash 565958021, now seen corresponding path program 4 times [2022-11-22 00:37:15,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:37:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511839261] [2022-11-22 00:37:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:37:15,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:37:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:37:15,356 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:37:15,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:37:15,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:37:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:37:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 00:37:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:15,552 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 [2022-11-22 00:37:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 90 proven. 143 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:37:16,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:37:24,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:37:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511839261] [2022-11-22 00:37:24,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511839261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574000100] [2022-11-22 00:37:24,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:37:24,409 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:37:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:37:24,410 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:37:24,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-22 00:37:24,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:37:24,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:37:24,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 00:37:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:37:27,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:37:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574000100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606361576] [2022-11-22 00:37:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:37:31,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:37:31,391 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:37:31,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-22 00:37:31,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:37:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:37:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 00:37:31,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:31,573 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 [2022-11-22 00:37:34,202 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 17 treesize of output 13 [2022-11-22 00:37:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:37:34,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:37:50,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606361576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:50,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:37:50,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 17, 16, 19, 19] total 92 [2022-11-22 00:37:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412224980] [2022-11-22 00:37:50,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:37:50,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-22 00:37:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:37:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-22 00:37:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=7635, Unknown=0, NotChecked=0, Total=8372 [2022-11-22 00:37:50,522 INFO L87 Difference]: Start difference. First operand 179 states and 207 transitions. Second operand has 92 states, 92 states have (on average 3.0869565217391304) internal successors, (284), 92 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:38:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:38:55,581 INFO L93 Difference]: Finished difference Result 334 states and 377 transitions. [2022-11-22 00:38:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 00:38:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.0869565217391304) internal successors, (284), 92 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-22 00:38:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:38:55,583 INFO L225 Difference]: With dead ends: 334 [2022-11-22 00:38:55,583 INFO L226 Difference]: Without dead ends: 292 [2022-11-22 00:38:55,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=2023, Invalid=14747, Unknown=0, NotChecked=0, Total=16770 [2022-11-22 00:38:55,590 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1142 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:38:55,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1360 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-11-22 00:38:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-22 00:38:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 188. [2022-11-22 00:38:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.1612903225806452) internal successors, (216), 187 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:38:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 216 transitions. [2022-11-22 00:38:55,598 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 216 transitions. Word has length 68 [2022-11-22 00:38:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:38:55,598 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 216 transitions. [2022-11-22 00:38:55,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.0869565217391304) internal successors, (284), 92 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:38:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 216 transitions. [2022-11-22 00:38:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:38:55,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:38:55,602 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:38:55,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:38:55,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-22 00:38:56,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-22 00:38:56,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 00:38:56,215 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-22 00:38:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:38:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash 253880091, now seen corresponding path program 5 times [2022-11-22 00:38:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 00:38:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827298529] [2022-11-22 00:38:56,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 00:38:56,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 00:38:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 00:38:56,217 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 00:38:56,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 00:38:56,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-22 00:38:56,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:38:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 00:38:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:38:56,678 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 [2022-11-22 00:38:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 120 proven. 164 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 00:38:58,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:39:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:39:06,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 00:39:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827298529] [2022-11-22 00:39:06,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827298529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:39:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [658605442] [2022-11-22 00:39:06,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 00:39:06,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 00:39:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 00:39:06,814 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 00:39:06,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-22 00:46:30,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-22 00:46:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:46:31,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 00:46:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:46:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 131 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:46:34,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:46:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 131 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:46:40,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [658605442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:46:40,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853613651] [2022-11-22 00:46:40,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 00:46:40,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:46:40,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:46:40,314 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:46:40,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_191efd04-7e81-4fd3-b41c-413e35172409/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-22 00:47:30,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-22 00:47:30,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:47:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 00:47:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:47:30,754 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 [2022-11-22 00:47:33,812 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 17 treesize of output 13 [2022-11-22 00:47:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 131 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:47:33,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:47:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 131 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 00:47:46,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853613651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:47:46,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 00:47:46,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 20, 18, 21, 20] total 97 [2022-11-22 00:47:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569015060] [2022-11-22 00:47:46,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 00:47:46,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-22 00:47:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 00:47:46,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-22 00:47:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=8549, Unknown=0, NotChecked=0, Total=9312 [2022-11-22 00:47:46,474 INFO L87 Difference]: Start difference. First operand 188 states and 216 transitions. Second operand has 97 states, 97 states have (on average 3.185567010309278) internal successors, (309), 97 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)