./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 19:44:10,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:44:10,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:44:10,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:44:10,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:44:10,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:44:10,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:44:10,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:44:10,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:44:10,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:44:10,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:44:10,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:44:10,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:44:10,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:44:10,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:44:10,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:44:10,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:44:10,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:44:10,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:44:10,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:44:10,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:44:10,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:44:10,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:44:10,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:44:10,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:44:10,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:44:10,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:44:10,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:44:10,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:44:10,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:44:10,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:44:10,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:44:10,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:44:10,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:44:10,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:44:10,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:44:10,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:44:10,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:44:10,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:44:10,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:44:10,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:44:10,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 19:44:10,636 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:44:10,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:44:10,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:44:10,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:44:10,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:44:10,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:44:10,638 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:44:10,638 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:44:10,638 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:44:10,643 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:44:10,644 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:44:10,644 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:44:10,644 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:44:10,645 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:44:10,645 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:44:10,645 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:44:10,645 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:44:10,645 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:44:10,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:44:10,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:44:10,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:44:10,647 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:44:10,647 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:44:10,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:44:10,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:44:10,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:44:10,648 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:44:10,649 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:44:10,649 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:44:10,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:44:10,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:44:10,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:44:10,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:44:10,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:44:10,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:44:10,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:44:10,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:44:10,651 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:44:10,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:44:10,651 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:44:10,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:44:10,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:44:10,652 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_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2022-11-20 19:44:10,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:44:10,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:44:10,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:44:10,922 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:44:10,922 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:44:10,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-20 19:44:13,879 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:44:14,201 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:44:14,203 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-20 19:44:14,215 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data/4847b04b9/5f01148448e748ca8ed40539b5d49468/FLAG0c407bc37 [2022-11-20 19:44:14,231 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data/4847b04b9/5f01148448e748ca8ed40539b5d49468 [2022-11-20 19:44:14,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:44:14,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:44:14,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:44:14,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:44:14,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:44:14,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:44:14" (1/1) ... [2022-11-20 19:44:14,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ea0cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:14, skipping insertion in model container [2022-11-20 19:44:14,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:44:14" (1/1) ... [2022-11-20 19:44:14,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:44:14,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:44:14,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:44:14,584 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 19:44:14,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f31c9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:14, skipping insertion in model container [2022-11-20 19:44:14,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:44:14,585 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 19:44:14,586 INFO L158 Benchmark]: Toolchain (without parser) took 346.69ms. Allocated memory is still 167.8MB. Free memory was 137.2MB in the beginning and 126.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 19:44:14,588 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 115.3MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:44:14,589 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.30ms. Allocated memory is still 167.8MB. Free memory was 137.2MB in the beginning and 126.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 19:44:14,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 115.3MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.30ms. Allocated memory is still 167.8MB. Free memory was 137.2MB in the beginning and 126.4MB in the end (delta: 10.8MB). 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 19:44:16,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:44:16,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:44:16,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:44:16,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:44:16,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:44:16,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:44:16,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:44:16,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:44:16,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:44:16,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:44:16,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:44:16,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:44:16,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:44:16,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:44:16,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:44:16,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:44:17,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:44:17,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:44:17,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:44:17,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:44:17,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:44:17,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:44:17,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:44:17,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:44:17,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:44:17,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:44:17,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:44:17,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:44:17,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:44:17,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:44:17,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:44:17,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:44:17,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:44:17,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:44:17,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:44:17,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:44:17,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:44:17,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:44:17,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:44:17,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:44:17,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 19:44:17,083 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:44:17,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:44:17,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:44:17,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:44:17,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:44:17,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:44:17,086 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:44:17,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:44:17,086 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:44:17,086 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:44:17,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:44:17,087 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:44:17,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:44:17,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:44:17,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:44:17,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:44:17,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:44:17,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:44:17,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:44:17,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:44:17,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:44:17,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:44:17,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:44:17,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:44:17,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:44:17,091 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 19:44:17,092 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 19:44:17,092 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:44:17,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:44:17,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:44:17,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 19:44:17,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:44:17,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:44:17,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:44:17,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:44:17,094 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 19:44:17,094 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:17,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:44:17,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 19:44:17,095 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_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2022-11-20 19:44:17,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:44:17,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:44:17,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:44:17,500 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:44:17,500 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:44:17,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-20 19:44:20,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:44:20,750 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:44:20,751 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2022-11-20 19:44:20,769 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data/15db1b009/222a3f0cddd04a7d93d1d2b15ba80cae/FLAG0f003dcba [2022-11-20 19:44:20,794 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/data/15db1b009/222a3f0cddd04a7d93d1d2b15ba80cae [2022-11-20 19:44:20,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:44:20,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:44:20,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:44:20,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:44:20,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:44:20,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:44:20" (1/1) ... [2022-11-20 19:44:20,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dfad84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:20, skipping insertion in model container [2022-11-20 19:44:20,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:44:20" (1/1) ... [2022-11-20 19:44:20,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:44:20,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:44:21,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:44:21,247 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 19:44:21,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:44:21,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:44:21,309 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:44:21,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:44:21,403 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:44:21,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21 WrapperNode [2022-11-20 19:44:21,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:44:21,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:44:21,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:44:21,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:44:21,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,471 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-11-20 19:44:21,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:44:21,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:44:21,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:44:21,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:44:21,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:44:21,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:44:21,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:44:21,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:44:21,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (1/1) ... [2022-11-20 19:44:21,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:44:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:21,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:44:21,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:44:21,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 19:44:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:44:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:44:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 19:44:21,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:44:21,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:44:21,781 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:44:21,783 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:44:22,056 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:44:22,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:44:22,068 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 19:44:22,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:44:22 BoogieIcfgContainer [2022-11-20 19:44:22,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:44:22,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:44:22,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:44:22,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:44:22,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:44:20" (1/3) ... [2022-11-20 19:44:22,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fd0107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:44:22, skipping insertion in model container [2022-11-20 19:44:22,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:44:21" (2/3) ... [2022-11-20 19:44:22,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41fd0107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:44:22, skipping insertion in model container [2022-11-20 19:44:22,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:44:22" (3/3) ... [2022-11-20 19:44:22,078 INFO L112 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2022-11-20 19:44:22,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:44:22,096 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-20 19:44:22,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:44:22,148 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;@7e5eab27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:44:22,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-20 19:44:22,154 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) [2022-11-20 19:44:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:44:22,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:22,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:44:22,163 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)] === [2022-11-20 19:44:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:22,171 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-20 19:44:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576518226] [2022-11-20 19:44:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:22,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:22,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:22,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 19:44:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:44:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:22,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 19:44:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:22,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:22,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:22,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576518226] [2022-11-20 19:44:22,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576518226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:22,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:22,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:44:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034613531] [2022-11-20 19:44:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:22,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:22,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:22,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:22,400 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) [2022-11-20 19:44:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:22,468 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-20 19:44:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:22,475 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 [2022-11-20 19:44:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:22,483 INFO L225 Difference]: With dead ends: 30 [2022-11-20 19:44:22,483 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 19:44:22,485 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 [2022-11-20 19:44:22,490 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-20 19:44:22,491 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] [2022-11-20 19:44:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 19:44:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 19:44:22,519 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) [2022-11-20 19:44:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-11-20 19:44:22,521 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2022-11-20 19:44:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:22,521 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-11-20 19:44:22,521 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) [2022-11-20 19:44:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-11-20 19:44:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:44:22,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:22,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:44:22,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:22,733 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)] === [2022-11-20 19:44:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-11-20 19:44:22,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:22,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94857556] [2022-11-20 19:44:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:22,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:22,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:22,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:22,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 19:44:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:44:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:22,893 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 [2022-11-20 19:44:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:22,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:22,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:22,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94857556] [2022-11-20 19:44:22,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94857556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:22,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:22,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:44:22,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495339941] [2022-11-20 19:44:22,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:22,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:22,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:22,934 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) [2022-11-20 19:44:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:23,122 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-20 19:44:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:44:23,124 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 [2022-11-20 19:44:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:23,125 INFO L225 Difference]: With dead ends: 57 [2022-11-20 19:44:23,125 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 19:44:23,125 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 [2022-11-20 19:44:23,127 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 19:44:23,127 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] [2022-11-20 19:44:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 19:44:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2022-11-20 19:44:23,132 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) [2022-11-20 19:44:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-20 19:44:23,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-11-20 19:44:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:23,133 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-20 19:44:23,133 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) [2022-11-20 19:44:23,133 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-20 19:44:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:44:23,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:23,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:44:23,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-20 19:44:23,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:23,362 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)] === [2022-11-20 19:44:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:23,365 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-20 19:44:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903275928] [2022-11-20 19:44:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:23,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:23,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 19:44:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:23,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:23,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:23,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:23,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903275928] [2022-11-20 19:44:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903275928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:23,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:23,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:44:23,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935825759] [2022-11-20 19:44:23,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:23,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:23,613 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) [2022-11-20 19:44:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:23,649 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-20 19:44:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:23,650 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 [2022-11-20 19:44:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:23,650 INFO L225 Difference]: With dead ends: 33 [2022-11-20 19:44:23,651 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 19:44:23,651 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 [2022-11-20 19:44:23,652 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:23,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-20 19:44:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 19:44:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-20 19:44:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-20 19:44:23,657 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-11-20 19:44:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:23,658 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-20 19:44:23,658 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) [2022-11-20 19:44:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-20 19:44:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:44:23,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:23,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:23,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:23,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:23,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2022-11-20 19:44:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:23,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990999210] [2022-11-20 19:44:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:23,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:23,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 19:44:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:23,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 19:44:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:24,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:24,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990999210] [2022-11-20 19:44:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990999210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:24,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:24,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:44:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863132172] [2022-11-20 19:44:24,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:24,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:24,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:24,007 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:24,115 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-20 19:44:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:44:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 19:44:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:24,116 INFO L225 Difference]: With dead ends: 29 [2022-11-20 19:44:24,116 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 19:44:24,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:44:24,118 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 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 [2022-11-20 19:44:24,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 19:44:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 19:44:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 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) [2022-11-20 19:44:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-20 19:44:24,125 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2022-11-20 19:44:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:24,125 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-20 19:44:24,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-20 19:44:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:44:24,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:24,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:24,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:24,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:24,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2022-11-20 19:44:24,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:24,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661306957] [2022-11-20 19:44:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:24,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:24,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:24,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 19:44:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:24,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:44:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:24,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:24,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:24,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661306957] [2022-11-20 19:44:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661306957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:44:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967384132] [2022-11-20 19:44:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:44:24,566 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:24,602 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-11-20 19:44:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:44:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 19:44:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:24,603 INFO L225 Difference]: With dead ends: 32 [2022-11-20 19:44:24,603 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 19:44:24,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:44:24,605 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:24,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-20 19:44:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 19:44:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 19:44:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-20 19:44:24,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2022-11-20 19:44:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:24,611 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-20 19:44:24,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-20 19:44:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:44:24,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:24,612 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:24,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:24,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:24,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-11-20 19:44:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:24,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439562703] [2022-11-20 19:44:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:24,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:24,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:24,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:24,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 19:44:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:44:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:25,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439562703] [2022-11-20 19:44:25,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439562703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622638688] [2022-11-20 19:44:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:25,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:25,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:25,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:25,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-20 19:44:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:44:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622638688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163655087] [2022-11-20 19:44:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:25,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:25,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:44:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:44:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163655087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:25,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-20 19:44:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632889163] [2022-11-20 19:44:25,406 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:25,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:44:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:44:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:44:25,410 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2022-11-20 19:44:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:25,518 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-11-20 19:44:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:44:25,523 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 [2022-11-20 19:44:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:25,524 INFO L225 Difference]: With dead ends: 52 [2022-11-20 19:44:25,524 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 19:44:25,524 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 [2022-11-20 19:44:25,525 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:25,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 19:44:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-11-20 19:44:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-20 19:44:25,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2022-11-20 19:44:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:25,529 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-20 19:44:25,529 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) [2022-11-20 19:44:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-20 19:44:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:44:25,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:25,530 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:25,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:25,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:25,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:26,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:26,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:26,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-20 19:44:26,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:26,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064830150] [2022-11-20 19:44:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:26,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:26,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:26,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:26,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 19:44:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:26,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:44:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:26,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:26,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:26,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:26,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064830150] [2022-11-20 19:44:26,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064830150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:26,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438663260] [2022-11-20 19:44:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:26,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:26,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:26,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-20 19:44:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 19:44:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:27,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1438663260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52418971] [2022-11-20 19:44:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:27,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:27,447 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:44:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 19:44:27,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:27,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52418971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:27,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:27,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-20 19:44:27,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891793457] [2022-11-20 19:44:27,800 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:27,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 19:44:27,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 19:44:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:44:27,801 INFO L87 Difference]: Start difference. First operand 36 states and 41 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) [2022-11-20 19:44:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:28,314 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-11-20 19:44:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 19:44:28,316 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 [2022-11-20 19:44:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:28,317 INFO L225 Difference]: With dead ends: 57 [2022-11-20 19:44:28,317 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 19:44:28,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:44:28,318 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:28,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 95 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 7 Unchecked, 0.5s Time] [2022-11-20 19:44:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 19:44:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-11-20 19:44:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-20 19:44:28,322 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2022-11-20 19:44:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:28,323 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-20 19:44:28,323 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) [2022-11-20 19:44:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-20 19:44:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:44:28,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:28,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:28,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:28,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:28,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:28,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:28,931 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)] === [2022-11-20 19:44:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2022-11-20 19:44:28,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582322497] [2022-11-20 19:44:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:28,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:28,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:28,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 19:44:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:29,024 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 [2022-11-20 19:44:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:29,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:29,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582322497] [2022-11-20 19:44:29,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582322497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:29,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:29,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:44:29,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764106005] [2022-11-20 19:44:29,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:29,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:44:29,101 INFO L87 Difference]: Start difference. First operand 41 states and 46 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) [2022-11-20 19:44:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:29,304 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-11-20 19:44:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:29,305 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 [2022-11-20 19:44:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:29,307 INFO L225 Difference]: With dead ends: 69 [2022-11-20 19:44:29,307 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 19:44:29,307 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 [2022-11-20 19:44:29,307 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 19:44:29,308 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] [2022-11-20 19:44:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 19:44:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-11-20 19:44:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-20 19:44:29,312 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2022-11-20 19:44:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:29,312 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-20 19:44:29,312 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) [2022-11-20 19:44:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-20 19:44:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:44:29,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:29,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:29,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:29,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:29,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2022-11-20 19:44:29,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:29,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540387552] [2022-11-20 19:44:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:29,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:29,531 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:29,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 19:44:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 19:44:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:29,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:30,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:30,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540387552] [2022-11-20 19:44:30,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540387552] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 19:44:30,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:44:30,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-20 19:44:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869747364] [2022-11-20 19:44:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:44:30,220 INFO L87 Difference]: Start difference. First operand 49 states and 56 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) [2022-11-20 19:44:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:30,441 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-11-20 19:44:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:30,442 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 [2022-11-20 19:44:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:30,442 INFO L225 Difference]: With dead ends: 53 [2022-11-20 19:44:30,442 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 19:44:30,443 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 [2022-11-20 19:44:30,443 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:30,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:44:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 19:44:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-11-20 19:44:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-20 19:44:30,447 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 12 [2022-11-20 19:44:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:30,447 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-20 19:44:30,447 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) [2022-11-20 19:44:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-20 19:44:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 19:44:30,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:30,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:30,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 19:44:30,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:30,656 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)] === [2022-11-20 19:44:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2022-11-20 19:44:30,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:30,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960573493] [2022-11-20 19:44:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:30,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:30,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:30,662 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:30,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 19:44:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:44:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:30,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:30,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:30,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960573493] [2022-11-20 19:44:30,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960573493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:30,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:30,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:44:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665755196] [2022-11-20 19:44:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:30,830 INFO L87 Difference]: Start difference. First operand 41 states and 47 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) [2022-11-20 19:44:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:30,918 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-11-20 19:44:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:44:30,919 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 [2022-11-20 19:44:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:30,920 INFO L225 Difference]: With dead ends: 64 [2022-11-20 19:44:30,920 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 19:44:30,920 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 [2022-11-20 19:44:30,921 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 [2022-11-20 19:44:30,921 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] [2022-11-20 19:44:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 19:44:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2022-11-20 19:44:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-20 19:44:30,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 14 [2022-11-20 19:44:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:30,925 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-20 19:44:30,925 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) [2022-11-20 19:44:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-20 19:44:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 19:44:30,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:30,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:30,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:31,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:31,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1346062156, now seen corresponding path program 1 times [2022-11-20 19:44:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:31,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460127036] [2022-11-20 19:44:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:31,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:31,141 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:31,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 19:44:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:31,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:31,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460127036] [2022-11-20 19:44:31,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460127036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:31,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356221910] [2022-11-20 19:44:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:31,431 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:31,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:31,435 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:31,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-20 19:44:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:31,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356221910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818046336] [2022-11-20 19:44:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:31,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:31,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 19:44:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:31,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:31,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818046336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:31,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 19:44:31,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6, 7, 6] total 12 [2022-11-20 19:44:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003951378] [2022-11-20 19:44:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:31,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:31,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:44:31,797 INFO L87 Difference]: Start difference. First operand 43 states and 49 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) [2022-11-20 19:44:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:31,880 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-20 19:44:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:44:31,881 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 [2022-11-20 19:44:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:31,882 INFO L225 Difference]: With dead ends: 50 [2022-11-20 19:44:31,882 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 19:44:31,882 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 [2022-11-20 19:44:31,883 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 [2022-11-20 19:44:31,883 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] [2022-11-20 19:44:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 19:44:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-11-20 19:44:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-20 19:44:31,888 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2022-11-20 19:44:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:31,889 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-20 19:44:31,889 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) [2022-11-20 19:44:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-20 19:44:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 19:44:31,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:31,890 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:31,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:32,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:32,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:32,493 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)] === [2022-11-20 19:44:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2022-11-20 19:44:32,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932121926] [2022-11-20 19:44:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:32,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:32,499 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:32,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 19:44:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:32,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:32,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932121926] [2022-11-20 19:44:32,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932121926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:32,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [214426541] [2022-11-20 19:44:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:32,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:32,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:32,719 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:32,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-20 19:44:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:32,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [214426541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:32,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034600412] [2022-11-20 19:44:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:32,931 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:32,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 19:44:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:33,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034600412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:33,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:33,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-20 19:44:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108722659] [2022-11-20 19:44:33,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:44:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:44:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:44:33,091 INFO L87 Difference]: Start difference. First operand 41 states and 46 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) [2022-11-20 19:44:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:33,219 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-20 19:44:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:44:33,220 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 [2022-11-20 19:44:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:33,221 INFO L225 Difference]: With dead ends: 55 [2022-11-20 19:44:33,221 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 19:44:33,221 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 [2022-11-20 19:44:33,222 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:33,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 99 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 19:44:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-11-20 19:44:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 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) [2022-11-20 19:44:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-20 19:44:33,225 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2022-11-20 19:44:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:33,225 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-20 19:44:33,226 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) [2022-11-20 19:44:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-20 19:44:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 19:44:33,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:33,226 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:33,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:33,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-11-20 19:44:33,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:33,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:33,836 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2022-11-20 19:44:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885290171] [2022-11-20 19:44:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:33,838 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:33,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 19:44:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:44:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:33,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:34,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:34,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885290171] [2022-11-20 19:44:34,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885290171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684988165] [2022-11-20 19:44:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:34,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:34,890 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:34,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-20 19:44:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:35,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:35,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684988165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37651621] [2022-11-20 19:44:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:35,649 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:35,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 19:44:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:35,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:35,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37651621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:35,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:35,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 8, 7] total 23 [2022-11-20 19:44:35,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421921237] [2022-11-20 19:44:35,892 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:35,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 19:44:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:35,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 19:44:35,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-20 19:44:35,895 INFO L87 Difference]: Start difference. First operand 51 states and 57 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) [2022-11-20 19:44:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:37,663 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-11-20 19:44:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:44:37,664 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 [2022-11-20 19:44:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:37,664 INFO L225 Difference]: With dead ends: 90 [2022-11-20 19:44:37,664 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 19:44:37,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 19:44:37,666 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 253 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:37,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 157 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 207 Invalid, 0 Unknown, 7 Unchecked, 0.7s Time] [2022-11-20 19:44:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 19:44:37,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2022-11-20 19:44:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-11-20 19:44:37,670 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2022-11-20 19:44:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:37,671 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-11-20 19:44:37,671 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) [2022-11-20 19:44:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-11-20 19:44:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 19:44:37,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:37,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:37,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:37,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-20 19:44:38,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-20 19:44:38,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:38,275 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2022-11-20 19:44:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84284189] [2022-11-20 19:44:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:38,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:38,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:38,277 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:38,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 19:44:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:38,510 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 [2022-11-20 19:44:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:44:38,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:38,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84284189] [2022-11-20 19:44:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84284189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:38,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:44:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876911736] [2022-11-20 19:44:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-20 19:44:38,513 INFO L87 Difference]: Start difference. First operand 67 states and 77 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) [2022-11-20 19:44:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:38,526 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2022-11-20 19:44:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:38,527 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 [2022-11-20 19:44:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:38,528 INFO L225 Difference]: With dead ends: 92 [2022-11-20 19:44:38,529 INFO L226 Difference]: Without dead ends: 87 [2022-11-20 19:44:38,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-20 19:44:38,529 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:38,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-20 19:44:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-20 19:44:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-11-20 19:44:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 81 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) [2022-11-20 19:44:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2022-11-20 19:44:38,534 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 18 [2022-11-20 19:44:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:38,534 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2022-11-20 19:44:38,534 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) [2022-11-20 19:44:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2022-11-20 19:44:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 19:44:38,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:38,536 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 19:44:38,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:38,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-11-20 19:44:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:38,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339533813] [2022-11-20 19:44:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:38,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:38,743 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:38,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 19:44:38,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:38,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:44:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:38,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:39,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:40,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339533813] [2022-11-20 19:44:40,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339533813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919698329] [2022-11-20 19:44:40,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:40,138 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:40,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:40,140 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:40,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-20 19:44:40,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:40,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:40,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:40,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:40,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919698329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791527190] [2022-11-20 19:44:41,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:41,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:41,003 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:41,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 19:44:41,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:41,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 19:44:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:41,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:41,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:43,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791527190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:43,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:43,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 9] total 27 [2022-11-20 19:44:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654437449] [2022-11-20 19:44:43,129 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:43,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 19:44:43,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 19:44:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=533, Unknown=0, NotChecked=0, Total=756 [2022-11-20 19:44:43,131 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:45,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:44:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:46,741 INFO L93 Difference]: Finished difference Result 282 states and 335 transitions. [2022-11-20 19:44:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 19:44:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 19:44:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:46,745 INFO L225 Difference]: With dead ends: 282 [2022-11-20 19:44:46,745 INFO L226 Difference]: Without dead ends: 282 [2022-11-20 19:44:46,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=331, Invalid=791, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 19:44:46,746 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 435 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:46,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 412 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 334 Invalid, 0 Unknown, 38 Unchecked, 2.5s Time] [2022-11-20 19:44:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-20 19:44:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 98. [2022-11-20 19:44:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 97 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2022-11-20 19:44:46,754 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 18 [2022-11-20 19:44:46,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:46,755 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2022-11-20 19:44:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2022-11-20 19:44:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:44:46,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:46,756 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:46,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:46,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 19:44:47,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:47,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:47,363 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash 997947932, now seen corresponding path program 1 times [2022-11-20 19:44:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:47,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722830545] [2022-11-20 19:44:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:47,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:47,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:47,366 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:47,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 19:44:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:47,626 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc8#1.base_24| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc8#1.base_24| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc8#1.base_24|) (_ bv0 1)))) is different from true [2022-11-20 19:44:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:44:47,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:47,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722830545] [2022-11-20 19:44:47,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722830545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:47,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:47,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:44:47,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011146921] [2022-11-20 19:44:47,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:47,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:47,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-20 19:44:47,629 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:47,636 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2022-11-20 19:44:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 19:44:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:47,638 INFO L225 Difference]: With dead ends: 97 [2022-11-20 19:44:47,638 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 19:44:47,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-20 19:44:47,639 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:47,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-11-20 19:44:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 19:44:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-11-20 19:44:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-11-20 19:44:47,643 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 24 [2022-11-20 19:44:47,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:47,644 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-11-20 19:44:47,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-11-20 19:44:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 19:44:47,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:47,645 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:47,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:47,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:47,855 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:44:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1755727223, now seen corresponding path program 2 times [2022-11-20 19:44:47,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:47,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344676532] [2022-11-20 19:44:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:47,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:47,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:47,857 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:44:47,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 19:44:47,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:47,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:44:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:47,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:48,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:51,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:51,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344676532] [2022-11-20 19:44:51,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344676532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952265408] [2022-11-20 19:44:51,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:51,164 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:51,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:51,167 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:51,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-20 19:44:51,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:51,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:52,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:53,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952265408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836706656] [2022-11-20 19:44:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:53,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:53,349 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:53,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 19:44:53,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:53,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 19:44:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:53,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:44:54,268 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 [2022-11-20 19:44:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:54,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:44:57,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836706656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:57,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:57,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 12, 12] total 51 [2022-11-20 19:44:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172657370] [2022-11-20 19:44:57,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:57,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 19:44:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 19:44:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2247, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 19:44:57,621 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:01,370 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2022-11-20 19:45:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:45:01,370 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 19:45:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:01,370 INFO L225 Difference]: With dead ends: 84 [2022-11-20 19:45:01,370 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 19:45:01,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=515, Invalid=3025, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 19:45:01,373 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 250 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:01,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 243 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 448 Invalid, 0 Unknown, 31 Unchecked, 1.6s Time] [2022-11-20 19:45:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 19:45:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-11-20 19:45:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-11-20 19:45:01,376 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 28 [2022-11-20 19:45:01,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:01,377 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-11-20 19:45:01,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-11-20 19:45:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 19:45:01,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:01,378 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:01,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:01,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-20 19:45:01,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:45:01,990 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)] === [2022-11-20 19:45:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1191228026, now seen corresponding path program 3 times [2022-11-20 19:45:01,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:01,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031759896] [2022-11-20 19:45:01,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:01,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:01,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:01,992 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:45:01,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 19:45:02,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 19:45:02,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 19:45:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:02,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:45:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:45:02,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:45:04,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:04,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031759896] [2022-11-20 19:45:04,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031759896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:04,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835817586] [2022-11-20 19:45:04,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:04,567 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:45:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:45:04,568 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:45:04,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-20 19:45:04,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 19:45:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 19:45:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:04,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:45:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:45:05,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:45:07,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1835817586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778520543] [2022-11-20 19:45:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:07,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:07,174 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:07,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 19:45:07,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 19:45:07,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:07,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 19:45:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:07,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:45:08,472 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 [2022-11-20 19:45:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:08,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:12,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778520543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:12,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:45:12,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 14, 13] total 44 [2022-11-20 19:45:12,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566689252] [2022-11-20 19:45:12,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 19:45:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 19:45:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 19:45:12,071 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:21,961 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2022-11-20 19:45:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 19:45:21,963 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2022-11-20 19:45:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:21,964 INFO L225 Difference]: With dead ends: 125 [2022-11-20 19:45:21,964 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 19:45:21,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=824, Invalid=3732, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 19:45:21,966 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 836 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:21,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 366 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 623 Invalid, 0 Unknown, 35 Unchecked, 2.5s Time] [2022-11-20 19:45:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 19:45:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-11-20 19:45:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 94 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2022-11-20 19:45:21,970 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 32 [2022-11-20 19:45:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:21,970 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2022-11-20 19:45:21,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2022-11-20 19:45:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 19:45:21,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:21,976 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-20 19:45:21,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:22,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 19:45:22,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:22,580 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:45:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-11-20 19:45:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575308323] [2022-11-20 19:45:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:22,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:22,582 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:45:22,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 19:45:22,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 19:45:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:45:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:22,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:45:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:23,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:26,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:26,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575308323] [2022-11-20 19:45:26,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575308323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185363397] [2022-11-20 19:45:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:26,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:45:26,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:45:26,499 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:45:26,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-20 19:45:26,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 19:45:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:45:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:27,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:45:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:28,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:33,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [185363397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039867345] [2022-11-20 19:45:33,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:45:33,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:33,158 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:33,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 19:45:33,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 19:45:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 19:45:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:34,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:45:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:34,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:45:38,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039867345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:38,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:45:38,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 15, 15, 15] total 51 [2022-11-20 19:45:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167331563] [2022-11-20 19:45:38,854 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 19:45:38,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 19:45:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1921, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 19:45:38,857 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:43,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:45,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:47,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:49,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:54,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:56,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:58,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:45:59,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:46:04,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:46:06,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:46:08,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:46:12,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:46:16,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:46:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:20,654 INFO L93 Difference]: Finished difference Result 727 states and 816 transitions. [2022-11-20 19:46:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 19:46:20,655 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 19:46:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:20,658 INFO L225 Difference]: With dead ends: 727 [2022-11-20 19:46:20,658 INFO L226 Difference]: Without dead ends: 727 [2022-11-20 19:46:20,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=1283, Invalid=3273, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 19:46:20,660 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1128 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 84 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:20,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 618 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 843 Invalid, 10 Unknown, 65 Unchecked, 29.2s Time] [2022-11-20 19:46:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-11-20 19:46:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 127. [2022-11-20 19:46:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.168) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2022-11-20 19:46:20,668 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 34 [2022-11-20 19:46:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:20,668 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2022-11-20 19:46:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2022-11-20 19:46:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 19:46:20,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:20,670 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:20,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:20,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 19:46:21,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-20 19:46:21,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:46:21,279 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:46:21,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 368894281, now seen corresponding path program 4 times [2022-11-20 19:46:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:46:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820291477] [2022-11-20 19:46:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:46:21,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:46:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:46:21,281 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:46:21,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 19:46:21,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:46:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:46:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 19:46:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:21,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:46:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 44 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 19:46:22,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:28,198 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:46:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820291477] [2022-11-20 19:46:28,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820291477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:28,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111760874] [2022-11-20 19:46:28,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:46:28,199 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:46:28,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:46:28,201 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:46:28,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-20 19:46:28,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:46:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:46:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:46:28,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:46:30,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:46:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111760874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321049591] [2022-11-20 19:46:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:46:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:32,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:32,760 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:32,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 19:46:32,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:46:32,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:46:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 19:46:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:32,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:46:34,580 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 [2022-11-20 19:46:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:46:34,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:46:44,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321049591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:44,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:46:44,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15, 14, 16, 17] total 77 [2022-11-20 19:46:44,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606284124] [2022-11-20 19:46:44,968 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:46:44,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 19:46:44,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:46:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 19:46:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=5292, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 19:46:44,971 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 77 states, 77 states have (on average 2.9220779220779223) internal successors, (225), 77 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:47:01,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:47:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:47:27,356 INFO L93 Difference]: Finished difference Result 259 states and 291 transitions. [2022-11-20 19:47:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 19:47:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9220779220779223) internal successors, (225), 77 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-20 19:47:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:47:27,357 INFO L225 Difference]: With dead ends: 259 [2022-11-20 19:47:27,358 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 19:47:27,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=1517, Invalid=10915, Unknown=0, NotChecked=0, Total=12432 [2022-11-20 19:47:27,364 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1030 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:47:27,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 984 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1685 Invalid, 0 Unknown, 180 Unchecked, 10.1s Time] [2022-11-20 19:47:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 19:47:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 136. [2022-11-20 19:47:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 135 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:47:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2022-11-20 19:47:27,370 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 52 [2022-11-20 19:47:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:47:27,370 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2022-11-20 19:47:27,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9220779220779223) internal successors, (225), 77 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:47:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2022-11-20 19:47:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 19:47:27,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:47:27,373 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:47:27,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-20 19:47:27,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 19:47:27,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 19:47:27,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:27,978 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:47:27,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:47:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash -683290673, now seen corresponding path program 5 times [2022-11-20 19:47:27,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:47:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169898079] [2022-11-20 19:47:27,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 19:47:27,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:47:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:47:27,980 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:47:27,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 19:47:28,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 19:47:28,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:47:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 19:47:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:47:28,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:47:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 26 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:47:30,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:47:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:47:41,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:47:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169898079] [2022-11-20 19:47:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169898079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:47:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [104644615] [2022-11-20 19:47:41,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 19:47:41,248 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:47:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:47:41,249 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:47:41,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-20 19:48:16,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 19:48:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:48:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:48:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:48:20,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:48:25,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [104644615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:48:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744336677] [2022-11-20 19:48:25,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 19:48:25,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:25,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:25,280 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:25,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 19:48:44,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 19:48:44,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:48:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 19:48:44,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:44,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:48:47,797 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 22 treesize of output 16 [2022-11-20 19:48:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:48:48,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:49:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:49:06,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744336677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:49:06,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:49:06,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20, 18, 22, 22] total 105 [2022-11-20 19:49:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338952886] [2022-11-20 19:49:06,862 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:49:06,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-20 19:49:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:49:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-20 19:49:06,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1059, Invalid=9861, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 19:49:06,867 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 105 states, 105 states have (on average 3.0) internal successors, (315), 105 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:49:35,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:49:57,917 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 91 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:50:01,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:51:04,678 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 108 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:51:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:12,632 INFO L93 Difference]: Finished difference Result 455 states and 509 transitions. [2022-11-20 19:51:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 19:51:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.0) internal successors, (315), 105 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 19:51:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:12,634 INFO L225 Difference]: With dead ends: 455 [2022-11-20 19:51:12,635 INFO L226 Difference]: Without dead ends: 273 [2022-11-20 19:51:12,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 257 SyntacticMatches, 9 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9664 ImplicationChecksByTransitivity, 140.7s TimeCoverageRelationStatistics Valid=5422, Invalid=28618, Unknown=0, NotChecked=0, Total=34040 [2022-11-20 19:51:12,642 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2706 mSDsluCounter, 2321 mSDsCounter, 0 mSdLazyCounter, 3369 mSolverCounterSat, 272 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 4027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 3369 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:12,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2706 Valid, 2384 Invalid, 4027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 3369 Invalid, 1 Unknown, 385 Unchecked, 19.9s Time] [2022-11-20 19:51:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-20 19:51:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 179. [2022-11-20 19:51:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.1412429378531073) internal successors, (202), 178 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 202 transitions. [2022-11-20 19:51:12,648 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 202 transitions. Word has length 60 [2022-11-20 19:51:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:12,649 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 202 transitions. [2022-11-20 19:51:12,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.0) internal successors, (315), 105 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 202 transitions. [2022-11-20 19:51:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 19:51:12,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:12,651 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:51:12,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:12,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:13,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-20 19:51:13,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:51:13,269 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:51:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 573796562, now seen corresponding path program 6 times [2022-11-20 19:51:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:51:13,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674840358] [2022-11-20 19:51:13,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 19:51:13,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:51:13,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:51:13,272 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:51:13,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 19:51:13,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 19:51:13,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:51:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 19:51:13,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:13,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:51:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:51:15,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:51:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:51:22,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:51:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674840358] [2022-11-20 19:51:22,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674840358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:51:22,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591604495] [2022-11-20 19:51:22,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 19:51:22,288 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:51:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:51:22,290 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:51:22,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-20 19:51:24,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 19:51:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:51:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 19:51:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:24,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:51:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:51:26,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:51:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:51:36,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591604495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:51:36,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563518065] [2022-11-20 19:51:36,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 19:51:36,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:36,035 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:36,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 19:51:37,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 19:51:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:51:37,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 19:51:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:37,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:51:42,277 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 [2022-11-20 19:51:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:51:42,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:05,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563518065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:05,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:52:05,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15, 17, 22, 23] total 82 [2022-11-20 19:52:05,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580263020] [2022-11-20 19:52:05,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:05,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-20 19:52:05,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:05,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-20 19:52:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=841, Invalid=5801, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 19:52:05,191 INFO L87 Difference]: Start difference. First operand 179 states and 202 transitions. Second operand has 82 states, 82 states have (on average 2.9634146341463414) internal successors, (243), 82 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:37,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:39,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:42,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:44,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:53,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:55,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:57,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:52:59,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:01,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:05,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:07,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:09,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:11,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:13,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:15,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:17,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:21,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:24,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:53:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:53:29,170 INFO L93 Difference]: Finished difference Result 315 states and 353 transitions. [2022-11-20 19:53:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 19:53:29,172 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.9634146341463414) internal successors, (243), 82 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 19:53:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:53:29,174 INFO L225 Difference]: With dead ends: 315 [2022-11-20 19:53:29,174 INFO L226 Difference]: Without dead ends: 257 [2022-11-20 19:53:29,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884 ImplicationChecksByTransitivity, 70.7s TimeCoverageRelationStatistics Valid=2688, Invalid=12812, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 19:53:29,176 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2370 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 182 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2370 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 44.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:53:29,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2370 Valid, 1265 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2025 Invalid, 15 Unknown, 134 Unchecked, 44.0s Time] [2022-11-20 19:53:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-20 19:53:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 191. [2022-11-20 19:53:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 190 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2022-11-20 19:53:29,181 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 64 [2022-11-20 19:53:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:53:29,181 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2022-11-20 19:53:29,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.9634146341463414) internal successors, (243), 82 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:53:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2022-11-20 19:53:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 19:53:29,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:53:29,182 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2022-11-20 19:53:29,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 19:53:29,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-20 19:53:29,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-20 19:53:29,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:29,783 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:53:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:53:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2022-11-20 19:53:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:53:29,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916293456] [2022-11-20 19:53:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:53:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:53:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:53:29,785 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:53:29,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 19:53:29,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:53:29,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:29,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 19:53:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:29,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:53:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:31,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:40,869 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:53:40,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916293456] [2022-11-20 19:53:40,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916293456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:40,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1396633909] [2022-11-20 19:53:40,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:53:40,870 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:53:40,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:53:40,871 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:53:40,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-20 19:53:41,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:53:41,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:53:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:41,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:53:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:42,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:51,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1396633909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:51,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134075827] [2022-11-20 19:53:51,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:53:51,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:53:51,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:53:51,363 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:53:51,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 19:53:51,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:53:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:53:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 19:53:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:53:51,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:53:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:53:53,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:54:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:54:15,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134075827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:54:15,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:54:15,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 27, 27] total 100 [2022-11-20 19:54:15,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514008308] [2022-11-20 19:54:15,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:54:15,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-20 19:54:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:54:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-20 19:54:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2599, Invalid=7501, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 19:54:15,114 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 101 states, 100 states have (on average 3.11) internal successors, (311), 101 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:54:25,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:27,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:29,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:31,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:33,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:35,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:37,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:39,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:41,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:50,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:52,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:54,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:56,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:54:59,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:01,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:03,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:05,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:13,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:15,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:17,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:19,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:21,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:23,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:25,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:27,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:35,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:37,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:39,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:41,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:43,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:45,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:47,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:53,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:55,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:57,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:55:59,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:01,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:03,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:11,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:13,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:19,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:21,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:56:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:43,563 INFO L93 Difference]: Finished difference Result 2983 states and 3352 transitions. [2022-11-20 19:56:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 19:56:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 3.11) internal successors, (311), 101 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-20 19:56:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:43,575 INFO L225 Difference]: With dead ends: 2983 [2022-11-20 19:56:43,575 INFO L226 Difference]: Without dead ends: 2983 [2022-11-20 19:56:43,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7674 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=5276, Invalid=13906, Unknown=0, NotChecked=0, Total=19182 [2022-11-20 19:56:43,577 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 4611 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 197 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4611 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 93.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:43,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4611 Valid, 2044 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2969 Invalid, 40 Unknown, 129 Unchecked, 93.9s Time] [2022-11-20 19:56:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-11-20 19:56:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 255. [2022-11-20 19:56:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 253 states have (on average 1.1620553359683794) internal successors, (294), 254 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 294 transitions. [2022-11-20 19:56:43,601 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 294 transitions. Word has length 66 [2022-11-20 19:56:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:43,601 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 294 transitions. [2022-11-20 19:56:43,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 3.11) internal successors, (311), 101 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:56:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 294 transitions. [2022-11-20 19:56:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 19:56:43,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:43,603 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:56:43,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:43,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:44,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:44,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:56:44,212 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-20 19:56:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1586014483, now seen corresponding path program 7 times [2022-11-20 19:56:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:56:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655922322] [2022-11-20 19:56:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:56:44,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:56:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:56:44,214 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:56:44,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 19:56:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 19:56:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:44,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:56:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 184 proven. 362 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 19:56:47,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:57:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:57:01,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:57:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655922322] [2022-11-20 19:57:01,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655922322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:57:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081753721] [2022-11-20 19:57:01,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:57:01,907 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:57:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:57:01,908 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:57:01,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-20 19:57:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:57:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:57:02,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:57:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 239 proven. 240 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:57:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:57:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 239 proven. 240 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:57:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081753721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:57:16,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462530478] [2022-11-20 19:57:16,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 19:57:16,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:57:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:57:16,155 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:57:16,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd972711-b99f-4a2f-88c7-f073500e3689/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 19:57:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:57:16,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 19:57:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:57:16,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:57:21,046 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 [2022-11-20 19:57:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 239 proven. 240 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:57:21,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:58:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 239 proven. 240 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 19:58:13,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462530478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:58:13,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:58:13,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 23, 22, 24, 27] total 129 [2022-11-20 19:58:13,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026141273] [2022-11-20 19:58:13,900 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:58:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-20 19:58:13,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:58:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-20 19:58:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1317, Invalid=15195, Unknown=0, NotChecked=0, Total=16512 [2022-11-20 19:58:13,904 INFO L87 Difference]: Start difference. First operand 255 states and 294 transitions. Second operand has 129 states, 129 states have (on average 3.294573643410853) internal successors, (425), 129 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)