./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW --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 501447f5c37550c3f5e8fdfcef22269dce5065ef789f4faf9fbe7fcfc263a044 --- 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-4e7fbc6 [2022-11-23 14:05:39,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:05:39,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:05:39,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:05:39,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:05:39,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:05:39,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:05:39,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:05:39,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:05:39,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:05:39,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:05:39,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:05:39,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:05:39,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:05:39,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:05:39,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:05:39,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:05:39,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:05:39,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:05:39,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:05:39,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:05:39,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:05:39,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:05:39,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:05:39,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:05:39,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:05:39,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:05:39,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:05:39,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:05:39,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:05:39,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:05:39,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:05:39,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:05:39,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:05:39,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:05:39,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:05:39,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:05:39,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:05:39,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:05:39,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:05:39,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:05:39,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:05:39,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:05:39,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:05:39,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:05:39,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:05:39,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:05:39,140 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:05:39,141 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:05:39,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:05:39,141 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:05:39,141 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:05:39,142 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:05:39,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:05:39,142 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:05:39,142 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:05:39,142 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:05:39,143 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:05:39,143 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:05:39,143 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:05:39,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:05:39,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:05:39,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:05:39,144 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:05:39,145 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:05:39,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:05:39,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:05:39,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:05:39,145 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:05:39,146 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:05:39,146 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:05:39,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:05:39,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:05:39,146 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:05:39,147 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:05:39,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:05:39,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:05:39,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:39,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:05:39,148 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:05:39,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:05:39,148 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:05:39,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:05:39,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:05:39,149 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_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 501447f5c37550c3f5e8fdfcef22269dce5065ef789f4faf9fbe7fcfc263a044 [2022-11-23 14:05:39,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:05:39,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:05:39,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:05:39,423 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:05:39,424 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:05:39,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i [2022-11-23 14:05:42,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:05:43,054 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:05:43,060 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i [2022-11-23 14:05:43,085 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data/b660f6503/293b998994fa4542b2aa512d9d5fd6c3/FLAGa962718d4 [2022-11-23 14:05:43,107 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data/b660f6503/293b998994fa4542b2aa512d9d5fd6c3 [2022-11-23 14:05:43,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:05:43,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:05:43,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:43,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:05:43,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:05:43,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:43" (1/1) ... [2022-11-23 14:05:43,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5108ec5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:43, skipping insertion in model container [2022-11-23 14:05:43,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:43" (1/1) ... [2022-11-23 14:05:43,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:05:43,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:43,834 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[33021,33034] [2022-11-23 14:05:44,092 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[84583,84596] [2022-11-23 14:05:44,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:44,114 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) [2022-11-23 14:05:44,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2376e9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:44, skipping insertion in model container [2022-11-23 14:05:44,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:44,116 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 14:05:44,118 INFO L158 Benchmark]: Toolchain (without parser) took 1002.09ms. Allocated memory is still 174.1MB. Free memory was 128.0MB in the beginning and 95.5MB in the end (delta: 32.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-23 14:05:44,119 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:05:44,119 INFO L158 Benchmark]: CACSL2BoogieTranslator took 997.73ms. Allocated memory is still 174.1MB. Free memory was 128.0MB in the beginning and 96.0MB in the end (delta: 32.0MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-23 14:05:44,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 997.73ms. Allocated memory is still 174.1MB. Free memory was 128.0MB in the beginning and 96.0MB in the end (delta: 32.0MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2221]: 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_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW --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 501447f5c37550c3f5e8fdfcef22269dce5065ef789f4faf9fbe7fcfc263a044 --- 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-4e7fbc6 [2022-11-23 14:05:46,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:05:46,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:05:46,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:05:46,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:05:46,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:05:46,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:05:46,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:05:46,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:05:46,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:05:46,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:05:46,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:05:46,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:05:46,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:05:46,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:05:46,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:05:46,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:05:46,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:05:46,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:05:46,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:05:46,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:05:46,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:05:46,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:05:46,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:05:46,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:05:46,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:05:46,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:05:46,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:05:46,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:05:46,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:05:46,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:05:46,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:05:46,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:05:46,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:05:46,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:05:46,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:05:46,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:05:46,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:05:46,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:05:46,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:05:46,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:05:46,524 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 14:05:46,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:05:46,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:05:46,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:05:46,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:05:46,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:05:46,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:05:46,566 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:05:46,566 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:05:46,567 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:05:46,567 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:05:46,568 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:05:46,568 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:05:46,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:05:46,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:05:46,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:05:46,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:05:46,570 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:05:46,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:05:46,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:05:46,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:05:46,571 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:05:46,572 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:05:46,572 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:05:46,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:05:46,572 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:05:46,573 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:05:46,573 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:05:46,573 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:05:46,573 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:05:46,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:05:46,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:05:46,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:05:46,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:46,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:05:46,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:05:46,575 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:05:46,576 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:05:46,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:05:46,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:05:46,576 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_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 501447f5c37550c3f5e8fdfcef22269dce5065ef789f4faf9fbe7fcfc263a044 [2022-11-23 14:05:46,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:05:46,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:05:46,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:05:46,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:05:46,991 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:05:46,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i [2022-11-23 14:05:50,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:05:50,486 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:05:50,488 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i [2022-11-23 14:05:50,511 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data/4ae5cb251/a053bc8eea504c6ab47d4f4f025e9e23/FLAGeec59cb60 [2022-11-23 14:05:50,534 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/data/4ae5cb251/a053bc8eea504c6ab47d4f4f025e9e23 [2022-11-23 14:05:50,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:05:50,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:05:50,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:50,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:05:50,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:05:50,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:50" (1/1) ... [2022-11-23 14:05:50,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efd7166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:50, skipping insertion in model container [2022-11-23 14:05:50,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:50" (1/1) ... [2022-11-23 14:05:50,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:05:50,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:51,207 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[33021,33034] [2022-11-23 14:05:51,504 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[84583,84596] [2022-11-23 14:05:51,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:51,564 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 14:05:51,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:05:51,622 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[33021,33034] [2022-11-23 14:05:51,745 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[84583,84596] [2022-11-23 14:05:51,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:51,751 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:05:51,784 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[33021,33034] [2022-11-23 14:05:51,917 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test9-1.i[84583,84596] [2022-11-23 14:05:51,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:05:51,954 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:05:51,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51 WrapperNode [2022-11-23 14:05:51,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:05:51,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:05:51,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:05:51,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:05:51,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,168 INFO L138 Inliner]: procedures = 180, calls = 730, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2866 [2022-11-23 14:05:52,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:05:52,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:05:52,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:05:52,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:05:52,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:05:52,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:05:52,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:05:52,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:05:52,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (1/1) ... [2022-11-23 14:05:52,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:05:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:52,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:05:52,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:05:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-23 14:05:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 14:05:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:05:52,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:05:52,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 14:05:52,503 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 14:05:52,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:05:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:05:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:05:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:05:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 14:05:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:05:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:05:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 14:05:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 14:05:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:05:52,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:05:52,759 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:05:52,768 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:05:52,773 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 14:05:58,983 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:05:59,006 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:05:59,006 INFO L300 CfgBuilder]: Removed 54 assume(true) statements. [2022-11-23 14:05:59,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:59 BoogieIcfgContainer [2022-11-23 14:05:59,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:05:59,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:05:59,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:05:59,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:05:59,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:05:50" (1/3) ... [2022-11-23 14:05:59,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3740a817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:59, skipping insertion in model container [2022-11-23 14:05:59,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:51" (2/3) ... [2022-11-23 14:05:59,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3740a817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:59, skipping insertion in model container [2022-11-23 14:05:59,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:59" (3/3) ... [2022-11-23 14:05:59,024 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test9-1.i [2022-11-23 14:05:59,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:05:59,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 431 error locations. [2022-11-23 14:05:59,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:05:59,137 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;@19519098, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:05:59,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 431 error locations. [2022-11-23 14:05:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 1871 states, 937 states have (on average 2.1024546424759873) internal successors, (1970), 1865 states have internal predecessors, (1970), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:05:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:05:59,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:59,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:05:59,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:05:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2022-11-23 14:05:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:05:59,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894560464] [2022-11-23 14:05:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:59,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:05:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:05:59,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:05:59,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:05:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:05:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:59,379 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 [2022-11-23 14:05:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:05:59,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:05:59,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:05:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894560464] [2022-11-23 14:05:59,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894560464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:59,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:59,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:05:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049807402] [2022-11-23 14:05:59,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:59,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:05:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:59,465 INFO L87 Difference]: Start difference. First operand has 1871 states, 937 states have (on average 2.1024546424759873) internal successors, (1970), 1865 states have internal predecessors, (1970), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:02,504 INFO L93 Difference]: Finished difference Result 1858 states and 2903 transitions. [2022-11-23 14:06:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:06:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:02,557 INFO L225 Difference]: With dead ends: 1858 [2022-11-23 14:06:02,557 INFO L226 Difference]: Without dead ends: 1856 [2022-11-23 14:06:02,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:02,563 INFO L413 NwaCegarLoop]: 2513 mSDtfsCounter, 1792 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2295 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:02,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2295 Valid, 2560 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:06:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2022-11-23 14:06:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1855. [2022-11-23 14:06:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 937 states have (on average 2.022411953041622) internal successors, (1895), 1849 states have internal predecessors, (1895), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2901 transitions. [2022-11-23 14:06:02,986 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2901 transitions. Word has length 3 [2022-11-23 14:06:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:02,987 INFO L495 AbstractCegarLoop]: Abstraction has 1855 states and 2901 transitions. [2022-11-23 14:06:02,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2901 transitions. [2022-11-23 14:06:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:06:02,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:02,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:06:03,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:03,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2022-11-23 14:06:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:03,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770400289] [2022-11-23 14:06:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:03,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:03,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:03,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:06:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:03,407 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 [2022-11-23 14:06:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:03,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:03,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770400289] [2022-11-23 14:06:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770400289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:03,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:03,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:03,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760000322] [2022-11-23 14:06:03,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:03,440 INFO L87 Difference]: Start difference. First operand 1855 states and 2901 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:07,339 INFO L93 Difference]: Finished difference Result 3064 states and 5131 transitions. [2022-11-23 14:06:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:06:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:07,358 INFO L225 Difference]: With dead ends: 3064 [2022-11-23 14:06:07,358 INFO L226 Difference]: Without dead ends: 3064 [2022-11-23 14:06:07,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:07,360 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 1230 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 5268 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:07,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1730 Valid, 5268 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 14:06:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2022-11-23 14:06:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2977. [2022-11-23 14:06:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 1560 states have (on average 2.001923076923077) internal successors, (3123), 2971 states have internal predecessors, (3123), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-23 14:06:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 5129 transitions. [2022-11-23 14:06:07,718 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 5129 transitions. Word has length 3 [2022-11-23 14:06:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:07,719 INFO L495 AbstractCegarLoop]: Abstraction has 2977 states and 5129 transitions. [2022-11-23 14:06:07,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 5129 transitions. [2022-11-23 14:06:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:06:07,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:07,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:07,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:07,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:07,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2022-11-23 14:06:07,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:07,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920618284] [2022-11-23 14:06:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:07,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:07,940 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:07,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:06:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:08,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:06:08,131 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 [2022-11-23 14:06:08,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:08,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:06:08,224 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:06:08,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:06:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:08,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:08,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920618284] [2022-11-23 14:06:08,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920618284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:08,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:08,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261368335] [2022-11-23 14:06:08,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:08,263 INFO L87 Difference]: Start difference. First operand 2977 states and 5129 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:13,269 INFO L93 Difference]: Finished difference Result 2967 states and 5118 transitions. [2022-11-23 14:06:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:06:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:13,283 INFO L225 Difference]: With dead ends: 2967 [2022-11-23 14:06:13,283 INFO L226 Difference]: Without dead ends: 2967 [2022-11-23 14:06:13,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:13,285 INFO L413 NwaCegarLoop]: 2290 mSDtfsCounter, 3642 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4145 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:13,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4145 Valid, 2316 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 14:06:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2022-11-23 14:06:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 1844. [2022-11-23 14:06:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 937 states have (on average 2.0096051227321237) internal successors, (1883), 1838 states have internal predecessors, (1883), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2889 transitions. [2022-11-23 14:06:13,575 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2889 transitions. Word has length 7 [2022-11-23 14:06:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:13,576 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 2889 transitions. [2022-11-23 14:06:13,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2889 transitions. [2022-11-23 14:06:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:06:13,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:13,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:13,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:13,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2022-11-23 14:06:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:13,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314983905] [2022-11-23 14:06:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:13,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:13,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:13,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:13,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:13,931 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 [2022-11-23 14:06:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:13,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:13,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:13,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314983905] [2022-11-23 14:06:13,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314983905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:13,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:13,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:13,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737511907] [2022-11-23 14:06:13,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:13,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:13,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:13,949 INFO L87 Difference]: Start difference. First operand 1844 states and 2889 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:16,882 INFO L93 Difference]: Finished difference Result 3010 states and 5076 transitions. [2022-11-23 14:06:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:06:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:16,899 INFO L225 Difference]: With dead ends: 3010 [2022-11-23 14:06:16,899 INFO L226 Difference]: Without dead ends: 3010 [2022-11-23 14:06:16,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:16,900 INFO L413 NwaCegarLoop]: 4653 mSDtfsCounter, 1802 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 6809 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:16,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2305 Valid, 6809 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:06:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-23 14:06:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1797. [2022-11-23 14:06:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 937 states have (on average 1.959445037353255) internal successors, (1836), 1791 states have internal predecessors, (1836), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2842 transitions. [2022-11-23 14:06:17,249 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2842 transitions. Word has length 8 [2022-11-23 14:06:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:17,249 INFO L495 AbstractCegarLoop]: Abstraction has 1797 states and 2842 transitions. [2022-11-23 14:06:17,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2842 transitions. [2022-11-23 14:06:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:06:17,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:17,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:17,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-23 14:06:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:17,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2022-11-23 14:06:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687757218] [2022-11-23 14:06:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:17,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:17,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:17,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:17,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:06:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:17,647 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 [2022-11-23 14:06:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:17,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:17,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687757218] [2022-11-23 14:06:17,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687757218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:17,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:17,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:17,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427587194] [2022-11-23 14:06:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:17,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:17,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:17,685 INFO L87 Difference]: Start difference. First operand 1797 states and 2842 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:21,426 INFO L93 Difference]: Finished difference Result 3077 states and 5145 transitions. [2022-11-23 14:06:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:06:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:21,442 INFO L225 Difference]: With dead ends: 3077 [2022-11-23 14:06:21,442 INFO L226 Difference]: Without dead ends: 3077 [2022-11-23 14:06:21,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:21,444 INFO L413 NwaCegarLoop]: 4847 mSDtfsCounter, 1491 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 7165 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1991 Valid, 7165 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 14:06:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2022-11-23 14:06:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 1819. [2022-11-23 14:06:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 969 states have (on average 1.9525283797729618) internal successors, (1892), 1813 states have internal predecessors, (1892), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2898 transitions. [2022-11-23 14:06:21,816 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2898 transitions. Word has length 8 [2022-11-23 14:06:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:21,816 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2898 transitions. [2022-11-23 14:06:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2898 transitions. [2022-11-23 14:06:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:06:21,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:21,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:21,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:22,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:22,029 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr429ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2100681113, now seen corresponding path program 1 times [2022-11-23 14:06:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40779872] [2022-11-23 14:06:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:22,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:22,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:22,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:22,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:22,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:06:22,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:22,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:06:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:06:22,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 38 [2022-11-23 14:06:22,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:06:22,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 22 [2022-11-23 14:06:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:22,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:22,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:22,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40779872] [2022-11-23 14:06:22,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40779872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:22,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:22,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:06:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514272613] [2022-11-23 14:06:22,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:22,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:22,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:22,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:22,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:22,371 INFO L87 Difference]: Start difference. First operand 1819 states and 2898 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:26,256 INFO L93 Difference]: Finished difference Result 3030 states and 5129 transitions. [2022-11-23 14:06:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:26,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:06:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:26,270 INFO L225 Difference]: With dead ends: 3030 [2022-11-23 14:06:26,270 INFO L226 Difference]: Without dead ends: 3030 [2022-11-23 14:06:26,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:26,271 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 1228 mSDsluCounter, 5474 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 8762 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:26,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 8762 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 14:06:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2022-11-23 14:06:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1821. [2022-11-23 14:06:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 971 states have (on average 1.9505664263645726) internal successors, (1894), 1815 states have internal predecessors, (1894), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2900 transitions. [2022-11-23 14:06:26,582 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2900 transitions. Word has length 10 [2022-11-23 14:06:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:26,582 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 2900 transitions. [2022-11-23 14:06:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2900 transitions. [2022-11-23 14:06:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:06:26,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:26,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:26,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:26,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2022-11-23 14:06:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998383403] [2022-11-23 14:06:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:26,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:26,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:26,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:26,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 14:06:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:26,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:26,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998383403] [2022-11-23 14:06:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998383403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:26,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:26,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470480354] [2022-11-23 14:06:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:26,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:26,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:26,998 INFO L87 Difference]: Start difference. First operand 1821 states and 2900 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:27,043 INFO L93 Difference]: Finished difference Result 1790 states and 2868 transitions. [2022-11-23 14:06:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 14:06:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:27,052 INFO L225 Difference]: With dead ends: 1790 [2022-11-23 14:06:27,052 INFO L226 Difference]: Without dead ends: 1790 [2022-11-23 14:06:27,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:27,053 INFO L413 NwaCegarLoop]: 2785 mSDtfsCounter, 1764 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:27,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2267 Valid, 3312 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:06:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-23 14:06:27,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1779. [2022-11-23 14:06:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 953 states have (on average 1.9422875131164743) internal successors, (1851), 1773 states have internal predecessors, (1851), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2857 transitions. [2022-11-23 14:06:27,203 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2857 transitions. Word has length 18 [2022-11-23 14:06:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:27,203 INFO L495 AbstractCegarLoop]: Abstraction has 1779 states and 2857 transitions. [2022-11-23 14:06:27,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2857 transitions. [2022-11-23 14:06:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:06:27,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:27,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:27,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:27,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:27,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2022-11-23 14:06:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:27,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673005738] [2022-11-23 14:06:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:27,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:27,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 14:06:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:27,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:27,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:27,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673005738] [2022-11-23 14:06:27,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673005738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:27,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:27,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:06:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253647743] [2022-11-23 14:06:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:27,670 INFO L87 Difference]: Start difference. First operand 1779 states and 2857 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:27,788 INFO L93 Difference]: Finished difference Result 1769 states and 2840 transitions. [2022-11-23 14:06:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 14:06:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:27,796 INFO L225 Difference]: With dead ends: 1769 [2022-11-23 14:06:27,797 INFO L226 Difference]: Without dead ends: 1769 [2022-11-23 14:06:27,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:27,797 INFO L413 NwaCegarLoop]: 2740 mSDtfsCounter, 1745 mSDsluCounter, 3260 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 6000 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:27,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 6000 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:06:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-11-23 14:06:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1757. [2022-11-23 14:06:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 945 states have (on average 1.928042328042328) internal successors, (1822), 1751 states have internal predecessors, (1822), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2828 transitions. [2022-11-23 14:06:27,927 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2828 transitions. Word has length 20 [2022-11-23 14:06:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:27,928 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2828 transitions. [2022-11-23 14:06:27,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2828 transitions. [2022-11-23 14:06:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:06:27,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:27,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:27,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:28,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:28,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2022-11-23 14:06:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:28,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879343095] [2022-11-23 14:06:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:28,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:28,145 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:28,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:06:28,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:28,342 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 [2022-11-23 14:06:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:28,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:28,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:28,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879343095] [2022-11-23 14:06:28,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879343095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:28,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:28,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554098021] [2022-11-23 14:06:28,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:28,446 INFO L87 Difference]: Start difference. First operand 1757 states and 2828 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 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) [2022-11-23 14:06:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:33,832 INFO L93 Difference]: Finished difference Result 2977 states and 5069 transitions. [2022-11-23 14:06:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-23 14:06:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:33,883 INFO L225 Difference]: With dead ends: 2977 [2022-11-23 14:06:33,888 INFO L226 Difference]: Without dead ends: 2977 [2022-11-23 14:06:33,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:33,890 INFO L413 NwaCegarLoop]: 2884 mSDtfsCounter, 3333 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3333 SdHoareTripleChecker+Valid, 6224 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:33,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3333 Valid, 6224 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 14:06:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2022-11-23 14:06:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1753. [2022-11-23 14:06:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 945 states have (on average 1.9238095238095239) internal successors, (1818), 1747 states have internal predecessors, (1818), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2824 transitions. [2022-11-23 14:06:34,143 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2824 transitions. Word has length 34 [2022-11-23 14:06:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:34,143 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2824 transitions. [2022-11-23 14:06:34,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 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) [2022-11-23 14:06:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2824 transitions. [2022-11-23 14:06:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:06:34,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:34,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:34,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:34,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:34,345 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:34,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2022-11-23 14:06:34,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374619991] [2022-11-23 14:06:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:34,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:34,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:34,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 14:06:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:06:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:34,568 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 6 treesize of output 5 [2022-11-23 14:06:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:34,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:34,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:34,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374619991] [2022-11-23 14:06:34,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374619991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:34,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:34,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741961815] [2022-11-23 14:06:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:34,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:34,807 INFO L87 Difference]: Start difference. First operand 1753 states and 2824 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 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) [2022-11-23 14:06:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:41,555 INFO L93 Difference]: Finished difference Result 3018 states and 5078 transitions. [2022-11-23 14:06:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-23 14:06:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:41,567 INFO L225 Difference]: With dead ends: 3018 [2022-11-23 14:06:41,567 INFO L226 Difference]: Without dead ends: 3018 [2022-11-23 14:06:41,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:41,568 INFO L413 NwaCegarLoop]: 3077 mSDtfsCounter, 2786 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 6719 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:41,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2786 Valid, 6719 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 14:06:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2022-11-23 14:06:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 1749. [2022-11-23 14:06:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 945 states have (on average 1.9195767195767195) internal successors, (1814), 1743 states have internal predecessors, (1814), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2820 transitions. [2022-11-23 14:06:41,885 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2820 transitions. Word has length 34 [2022-11-23 14:06:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:41,888 INFO L495 AbstractCegarLoop]: Abstraction has 1749 states and 2820 transitions. [2022-11-23 14:06:41,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 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) [2022-11-23 14:06:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2820 transitions. [2022-11-23 14:06:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:06:41,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:41,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:41,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:42,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:42,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr117REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1723497600, now seen corresponding path program 1 times [2022-11-23 14:06:42,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:42,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760696034] [2022-11-23 14:06:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:42,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:42,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:42,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:42,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 14:06:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:42,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:42,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:42,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760696034] [2022-11-23 14:06:42,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760696034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:42,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:42,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:06:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124428189] [2022-11-23 14:06:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:42,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:42,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:42,416 INFO L87 Difference]: Start difference. First operand 1749 states and 2820 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2022-11-23 14:06:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:42,499 INFO L93 Difference]: Finished difference Result 1754 states and 2821 transitions. [2022-11-23 14:06:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) Word has length 49 [2022-11-23 14:06:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:42,513 INFO L225 Difference]: With dead ends: 1754 [2022-11-23 14:06:42,513 INFO L226 Difference]: Without dead ends: 1754 [2022-11-23 14:06:42,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:42,514 INFO L413 NwaCegarLoop]: 2734 mSDtfsCounter, 1714 mSDsluCounter, 3244 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2217 SdHoareTripleChecker+Valid, 5978 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:42,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2217 Valid, 5978 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:06:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-11-23 14:06:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1743. [2022-11-23 14:06:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 939 states have (on average 1.9211927582534611) internal successors, (1804), 1737 states have internal predecessors, (1804), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-23 14:06:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2810 transitions. [2022-11-23 14:06:42,696 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2810 transitions. Word has length 49 [2022-11-23 14:06:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:42,696 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2810 transitions. [2022-11-23 14:06:42,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2022-11-23 14:06:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2810 transitions. [2022-11-23 14:06:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 14:06:42,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:42,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:42,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:42,916 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr117REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2061892788, now seen corresponding path program 1 times [2022-11-23 14:06:42,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:42,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906241822] [2022-11-23 14:06:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:42,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:42,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:42,919 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:42,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:43,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:43,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:43,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:43,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906241822] [2022-11-23 14:06:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906241822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:43,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:43,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771105259] [2022-11-23 14:06:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:43,502 INFO L87 Difference]: Start difference. First operand 1743 states and 2810 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2022-11-23 14:06:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:43,666 INFO L93 Difference]: Finished difference Result 2935 states and 5014 transitions. [2022-11-23 14:06:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:43,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 57 [2022-11-23 14:06:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:43,676 INFO L225 Difference]: With dead ends: 2935 [2022-11-23 14:06:43,676 INFO L226 Difference]: Without dead ends: 2935 [2022-11-23 14:06:43,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:43,677 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 1219 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 5994 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:43,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1721 Valid, 5994 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:06:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2022-11-23 14:06:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2880. [2022-11-23 14:06:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 1576 states have (on average 1.906725888324873) internal successors, (3005), 2874 states have internal predecessors, (3005), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-23 14:06:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 5011 transitions. [2022-11-23 14:06:43,979 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 5011 transitions. Word has length 57 [2022-11-23 14:06:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:43,979 INFO L495 AbstractCegarLoop]: Abstraction has 2880 states and 5011 transitions. [2022-11-23 14:06:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2022-11-23 14:06:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 5011 transitions. [2022-11-23 14:06:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:06:43,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:43,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:44,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:44,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:44,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2022-11-23 14:06:44,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:44,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785438339] [2022-11-23 14:06:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:44,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:44,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:44,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:06:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:44,579 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 [2022-11-23 14:06:44,585 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 [2022-11-23 14:06:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:45,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:06:45,163 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:06:45,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:06:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:45,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:45,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:45,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785438339] [2022-11-23 14:06:45,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785438339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:45,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:45,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692383684] [2022-11-23 14:06:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:45,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:45,187 INFO L87 Difference]: Start difference. First operand 2880 states and 5011 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:51,096 INFO L93 Difference]: Finished difference Result 5141 states and 9357 transitions. [2022-11-23 14:06:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-11-23 14:06:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:51,114 INFO L225 Difference]: With dead ends: 5141 [2022-11-23 14:06:51,115 INFO L226 Difference]: Without dead ends: 5141 [2022-11-23 14:06:51,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:06:51,116 INFO L413 NwaCegarLoop]: 2745 mSDtfsCounter, 2912 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3915 SdHoareTripleChecker+Valid, 3868 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:51,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3915 Valid, 3868 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 14:06:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2022-11-23 14:06:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 2810. [2022-11-23 14:06:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 1544 states have (on average 1.8788860103626943) internal successors, (2901), 2804 states have internal predecessors, (2901), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-23 14:06:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 4907 transitions. [2022-11-23 14:06:51,781 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 4907 transitions. Word has length 60 [2022-11-23 14:06:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:51,783 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 4907 transitions. [2022-11-23 14:06:51,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 4907 transitions. [2022-11-23 14:06:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:06:51,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:51,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:51,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:52,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:52,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2022-11-23 14:06:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376376361] [2022-11-23 14:06:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:52,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:52,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:52,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:52,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:06:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:52,319 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 [2022-11-23 14:06:52,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-23 14:06:52,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2022-11-23 14:06:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:52,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:52,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376376361] [2022-11-23 14:06:52,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376376361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:52,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:52,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:06:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504134601] [2022-11-23 14:06:52,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:52,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:06:52,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:06:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:52,381 INFO L87 Difference]: Start difference. First operand 2810 states and 4907 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:54,858 INFO L93 Difference]: Finished difference Result 2809 states and 4906 transitions. [2022-11-23 14:06:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:06:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-23 14:06:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:54,869 INFO L225 Difference]: With dead ends: 2809 [2022-11-23 14:06:54,869 INFO L226 Difference]: Without dead ends: 2809 [2022-11-23 14:06:54,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:06:54,870 INFO L413 NwaCegarLoop]: 2694 mSDtfsCounter, 4 mSDsluCounter, 7087 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9781 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:54,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9781 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:06:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-11-23 14:06:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2809. [2022-11-23 14:06:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 1544 states have (on average 1.878238341968912) internal successors, (2900), 2803 states have internal predecessors, (2900), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-23 14:06:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 4906 transitions. [2022-11-23 14:06:55,255 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 4906 transitions. Word has length 65 [2022-11-23 14:06:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:55,255 INFO L495 AbstractCegarLoop]: Abstraction has 2809 states and 4906 transitions. [2022-11-23 14:06:55,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 4906 transitions. [2022-11-23 14:06:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:06:55,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:55,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:55,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:55,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:55,472 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2022-11-23 14:06:55,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685583183] [2022-11-23 14:06:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:55,476 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:55,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:06:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:55,822 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 [2022-11-23 14:06:55,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-23 14:06:55,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-23 14:06:55,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-11-23 14:06:55,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-23 14:06:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:55,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:55,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:06:55,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685583183] [2022-11-23 14:06:55,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685583183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:55,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:55,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:06:55,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814353655] [2022-11-23 14:06:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:55,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:06:55,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:06:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:06:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:06:55,958 INFO L87 Difference]: Start difference. First operand 2809 states and 4906 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:59,380 INFO L93 Difference]: Finished difference Result 2808 states and 4905 transitions. [2022-11-23 14:06:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:06:59,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-23 14:06:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:59,391 INFO L225 Difference]: With dead ends: 2808 [2022-11-23 14:06:59,392 INFO L226 Difference]: Without dead ends: 2808 [2022-11-23 14:06:59,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:06:59,393 INFO L413 NwaCegarLoop]: 2694 mSDtfsCounter, 2 mSDsluCounter, 7107 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9801 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:59,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9801 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-23 14:06:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2022-11-23 14:06:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2808. [2022-11-23 14:06:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 1543 states have (on average 1.878807517822424) internal successors, (2899), 2802 states have internal predecessors, (2899), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-23 14:06:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 4905 transitions. [2022-11-23 14:06:59,741 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 4905 transitions. Word has length 65 [2022-11-23 14:06:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:59,742 INFO L495 AbstractCegarLoop]: Abstraction has 2808 states and 4905 transitions. [2022-11-23 14:06:59,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:06:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 4905 transitions. [2022-11-23 14:06:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:06:59,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:59,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:59,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 14:06:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:59,959 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:06:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash 96402255, now seen corresponding path program 1 times [2022-11-23 14:06:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:06:59,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886030173] [2022-11-23 14:06:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:59,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:06:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:06:59,961 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:06:59,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 14:07:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:00,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:07:00,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:00,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:00,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886030173] [2022-11-23 14:07:00,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886030173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:00,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:00,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:07:00,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117528979] [2022-11-23 14:07:00,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:00,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:07:00,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:00,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:07:00,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:07:00,293 INFO L87 Difference]: Start difference. First operand 2808 states and 4905 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:07:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:00,378 INFO L93 Difference]: Finished difference Result 2811 states and 4909 transitions. [2022-11-23 14:07:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:07:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-11-23 14:07:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:00,402 INFO L225 Difference]: With dead ends: 2811 [2022-11-23 14:07:00,402 INFO L226 Difference]: Without dead ends: 2811 [2022-11-23 14:07:00,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:07:00,405 INFO L413 NwaCegarLoop]: 2694 mSDtfsCounter, 2 mSDsluCounter, 5383 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8077 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:00,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8077 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:07:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-11-23 14:07:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2811. [2022-11-23 14:07:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 1545 states have (on average 1.8783171521035598) internal successors, (2902), 2805 states have internal predecessors, (2902), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 3 states have return successors, (1004), 5 states have call predecessors, (1004), 1003 states have call successors, (1004) [2022-11-23 14:07:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4909 transitions. [2022-11-23 14:07:00,676 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4909 transitions. Word has length 73 [2022-11-23 14:07:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:00,676 INFO L495 AbstractCegarLoop]: Abstraction has 2811 states and 4909 transitions. [2022-11-23 14:07:00,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:07:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4909 transitions. [2022-11-23 14:07:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:07:00,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:00,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:00,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:00,893 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:07:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1565083746, now seen corresponding path program 1 times [2022-11-23 14:07:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:00,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901448594] [2022-11-23 14:07:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:00,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:00,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:00,896 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:00,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 14:07:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:07:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:01,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:01,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901448594] [2022-11-23 14:07:01,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901448594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:01,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605518158] [2022-11-23 14:07:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:01,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:01,416 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:01,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 14:07:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:01,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:07:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:01,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:02,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605518158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:02,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550850320] [2022-11-23 14:07:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:02,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:02,040 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:02,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:07:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:07:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550850320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:02,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:02,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-23 14:07:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256223091] [2022-11-23 14:07:02,491 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:02,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:07:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:07:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:07:02,493 INFO L87 Difference]: Start difference. First operand 2811 states and 4909 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:07:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:02,746 INFO L93 Difference]: Finished difference Result 2823 states and 4926 transitions. [2022-11-23 14:07:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:07:02,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2022-11-23 14:07:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:02,759 INFO L225 Difference]: With dead ends: 2823 [2022-11-23 14:07:02,759 INFO L226 Difference]: Without dead ends: 2823 [2022-11-23 14:07:02,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:07:02,760 INFO L413 NwaCegarLoop]: 2695 mSDtfsCounter, 18 mSDsluCounter, 8074 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10769 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:02,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10769 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-11-23 14:07:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2821. [2022-11-23 14:07:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 1554 states have (on average 1.877091377091377) internal successors, (2917), 2814 states have internal predecessors, (2917), 1003 states have call successors, (1003), 3 states have call predecessors, (1003), 4 states have return successors, (1004), 5 states have call predecessors, (1004), 1003 states have call successors, (1004) [2022-11-23 14:07:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4924 transitions. [2022-11-23 14:07:03,122 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4924 transitions. Word has length 74 [2022-11-23 14:07:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:03,123 INFO L495 AbstractCegarLoop]: Abstraction has 2821 states and 4924 transitions. [2022-11-23 14:07:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:07:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4924 transitions. [2022-11-23 14:07:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:07:03,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:03,129 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:03,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:03,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:03,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:03,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:03,735 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:07:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:03,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1133303793, now seen corresponding path program 2 times [2022-11-23 14:07:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030400409] [2022-11-23 14:07:03,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:07:03,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:03,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:03,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 14:07:04,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:07:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:07:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:04,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:04,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030400409] [2022-11-23 14:07:04,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030400409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1813414729] [2022-11-23 14:07:04,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:07:04,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:04,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:04,670 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:04,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-23 14:07:06,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:07:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:07:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:06,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:06,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1813414729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312281974] [2022-11-23 14:07:06,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:07:06,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:06,649 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:06,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 14:07:26,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:07:26,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:07:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:26,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:27,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312281974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:27,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:07:27,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-23 14:07:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939771133] [2022-11-23 14:07:27,032 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:07:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:07:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:07:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:07:27,034 INFO L87 Difference]: Start difference. First operand 2821 states and 4924 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:07:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:28,135 INFO L93 Difference]: Finished difference Result 2842 states and 4951 transitions. [2022-11-23 14:07:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:07:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2022-11-23 14:07:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:28,158 INFO L225 Difference]: With dead ends: 2842 [2022-11-23 14:07:28,158 INFO L226 Difference]: Without dead ends: 2836 [2022-11-23 14:07:28,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:07:28,159 INFO L413 NwaCegarLoop]: 2697 mSDtfsCounter, 74 mSDsluCounter, 16159 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 18856 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:28,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 18856 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:07:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2022-11-23 14:07:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2830. [2022-11-23 14:07:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 1563 states have (on average 1.873320537428023) internal successors, (2928), 2823 states have internal predecessors, (2928), 1003 states have call successors, (1003), 3 states have call predecessors, (1003), 4 states have return successors, (1004), 5 states have call predecessors, (1004), 1003 states have call successors, (1004) [2022-11-23 14:07:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 4935 transitions. [2022-11-23 14:07:28,485 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 4935 transitions. Word has length 77 [2022-11-23 14:07:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:28,485 INFO L495 AbstractCegarLoop]: Abstraction has 2830 states and 4935 transitions. [2022-11-23 14:07:28,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:07:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 4935 transitions. [2022-11-23 14:07:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 14:07:28,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:28,487 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:28,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:28,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:28,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:29,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:29,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 428 more)] === [2022-11-23 14:07:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -269207761, now seen corresponding path program 3 times [2022-11-23 14:07:29,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:07:29,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567261894] [2022-11-23 14:07:29,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:29,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:07:29,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:07:29,108 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:07:29,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 14:07:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:07:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:07:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:30,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:31,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:07:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567261894] [2022-11-23 14:07:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567261894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205545359] [2022-11-23 14:07:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:07:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:07:31,191 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:07:31,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-23 14:07:36,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:07:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:07:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:36,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:36,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205545359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941147276] [2022-11-23 14:07:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:36,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:36,612 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:36,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d6043-8af9-4c12-b84a-00756f839fda/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process