./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7 --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 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:47:53,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:47:53,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:47:53,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:47:53,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:47:53,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:47:53,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:47:53,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:47:53,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:47:53,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:47:53,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:47:53,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:47:53,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:47:53,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:47:53,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:47:53,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:47:53,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:47:53,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:47:53,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:47:53,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:47:53,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:47:53,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:47:53,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:47:53,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:47:53,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:47:53,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:47:53,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:47:53,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:47:53,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:47:53,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:47:53,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:47:53,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:47:53,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:47:53,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:47:53,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:47:53,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:47:53,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:47:53,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:47:53,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:47:53,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:47:53,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:47:53,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:47:53,261 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:47:53,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:47:53,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:47:53,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:47:53,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:47:53,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:47:53,265 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:47:53,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:47:53,266 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:47:53,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:47:53,267 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:47:53,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:47:53,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:47:53,268 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:47:53,269 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:47:53,269 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:47:53,269 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:47:53,270 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:47:53,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:47:53,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:47:53,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:47:53,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:47:53,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:47:53,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:47:53,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:47:53,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:47:53,275 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:47:53,275 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:47:53,275 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:47:53,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:47:53,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:47:53,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:47:53,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:47:53,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:47:53,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:47:53,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:47:53,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:47:53,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:47:53,279 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:47:53,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:47:53,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:47:53,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:47:53,280 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 [2021-11-25 19:47:53,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:47:53,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:47:53,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:47:53,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:47:53,631 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:47:53,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-25 19:47:53,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/71ad2af40/34d7639b6f5a4217b34b92b7c8123b48/FLAG7133dad07 [2021-11-25 19:47:54,495 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:47:54,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-25 19:47:54,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/71ad2af40/34d7639b6f5a4217b34b92b7c8123b48/FLAG7133dad07 [2021-11-25 19:47:54,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/71ad2af40/34d7639b6f5a4217b34b92b7c8123b48 [2021-11-25 19:47:54,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:47:54,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:47:54,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:47:54,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:47:54,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:47:54,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:47:54" (1/1) ... [2021-11-25 19:47:54,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17052ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:47:54, skipping insertion in model container [2021-11-25 19:47:54,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:47:54" (1/1) ... [2021-11-25 19:47:54,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:47:54,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:47:55,210 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-25 19:47:55,364 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-25 19:47:55,366 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-25 19:47:55,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:47:55,391 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-25 19:47:55,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d8b9453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:47:55, skipping insertion in model container [2021-11-25 19:47:55,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:47:55,400 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 19:47:55,403 INFO L158 Benchmark]: Toolchain (without parser) took 796.19ms. Allocated memory is still 102.8MB. Free memory was 68.6MB in the beginning and 68.0MB in the end (delta: 595.1kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:47:55,405 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory was 58.3MB in the beginning and 58.3MB in the end (delta: 15.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:47:55,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 793.06ms. Allocated memory is still 102.8MB. Free memory was 68.3MB in the beginning and 68.0MB in the end (delta: 306.3kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:47:55,410 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory was 58.3MB in the beginning and 58.3MB in the end (delta: 15.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 793.06ms. Allocated memory is still 102.8MB. Free memory was 68.3MB in the beginning and 68.0MB in the end (delta: 306.3kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7 --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 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:47:58,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:47:58,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:47:58,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:47:58,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:47:58,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:47:58,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:47:58,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:47:58,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:47:58,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:47:58,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:47:58,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:47:58,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:47:58,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:47:58,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:47:58,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:47:58,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:47:58,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:47:58,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:47:58,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:47:58,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:47:58,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:47:58,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:47:58,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:47:58,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:47:58,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:47:58,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:47:58,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:47:58,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:47:58,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:47:58,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:47:58,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:47:58,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:47:58,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:47:58,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:47:58,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:47:58,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:47:58,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:47:58,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:47:58,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:47:58,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:47:58,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 19:47:58,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:47:58,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:47:58,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:47:58,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:47:58,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:47:58,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:47:58,360 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:47:58,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:47:58,362 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:47:58,362 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:47:58,363 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:47:58,364 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:47:58,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:47:58,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:47:58,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:47:58,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:47:58,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:47:58,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:47:58,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:47:58,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:47:58,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:47:58,368 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:47:58,368 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:47:58,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:47:58,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:47:58,369 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:47:58,370 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:47:58,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:47:58,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:47:58,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:47:58,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:47:58,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:47:58,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:47:58,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:47:58,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:47:58,373 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:47:58,373 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:47:58,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:47:58,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:47:58,374 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 [2021-11-25 19:47:58,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:47:58,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:47:58,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:47:58,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:47:58,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:47:58,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-25 19:47:58,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/e0f60b29d/595a9fb443b0430aa9e81a8be90ca43a/FLAG81e736c6a [2021-11-25 19:47:59,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:47:59,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-25 19:47:59,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/e0f60b29d/595a9fb443b0430aa9e81a8be90ca43a/FLAG81e736c6a [2021-11-25 19:47:59,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/data/e0f60b29d/595a9fb443b0430aa9e81a8be90ca43a [2021-11-25 19:47:59,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:47:59,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:47:59,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:47:59,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:47:59,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:47:59,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:47:59" (1/1) ... [2021-11-25 19:47:59,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28088e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:47:59, skipping insertion in model container [2021-11-25 19:47:59,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:47:59" (1/1) ... [2021-11-25 19:47:59,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:48:00,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:00,645 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-25 19:48:00,830 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-25 19:48:00,831 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-25 19:48:00,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:00,867 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 19:48:00,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:00,910 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-25 19:48:00,995 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-25 19:48:00,996 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-25 19:48:01,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:01,015 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:48:01,054 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-25 19:48:01,180 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-25 19:48:01,188 WARN L230 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_6f860a6e-dde4-47c5-9012-3aad7984f9cf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-25 19:48:01,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:01,280 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:48:01,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01 WrapperNode [2021-11-25 19:48:01,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:01,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:01,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:48:01,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:48:01,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,435 INFO L137 Inliner]: procedures = 179, calls = 277, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1011 [2021-11-25 19:48:01,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:01,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:48:01,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:48:01,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:48:01,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:48:01,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:48:01,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:48:01,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:48:01,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (1/1) ... [2021-11-25 19:48:01,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:01,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:01,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:48:01,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:48:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 19:48:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:48:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:48:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:48:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:48:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:48:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:48:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:48:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 19:48:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:48:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:48:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:48:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:48:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:48:01,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:48:02,023 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:48:02,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:48:02,030 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:48:08,161 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:48:08,188 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:48:08,188 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 19:48:08,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:08 BoogieIcfgContainer [2021-11-25 19:48:08,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:48:08,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:48:08,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:48:08,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:48:08,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:47:59" (1/3) ... [2021-11-25 19:48:08,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a10d45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:08, skipping insertion in model container [2021-11-25 19:48:08,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:01" (2/3) ... [2021-11-25 19:48:08,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a10d45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:08, skipping insertion in model container [2021-11-25 19:48:08,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:08" (3/3) ... [2021-11-25 19:48:08,210 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test7-1.i [2021-11-25 19:48:08,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:48:08,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 530 error locations. [2021-11-25 19:48:08,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:48:08,330 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:48:08,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 530 error locations. [2021-11-25 19:48:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 1050 states, 518 states have (on average 2.2548262548262548) internal successors, (1168), 1045 states have internal predecessors, (1168), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:48:08,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:08,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:48:08,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-25 19:48:08,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:08,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319517618] [2021-11-25 19:48:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:08,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:08,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:08,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:08,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:48:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:08,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:08,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319517618] [2021-11-25 19:48:08,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319517618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:08,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:08,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:48:08,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614774240] [2021-11-25 19:48:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:08,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:08,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:08,924 INFO L87 Difference]: Start difference. First operand has 1050 states, 518 states have (on average 2.2548262548262548) internal successors, (1168), 1045 states have internal predecessors, (1168), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2021-11-25 19:48:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:11,397 INFO L93 Difference]: Finished difference Result 1041 states and 1096 transitions. [2021-11-25 19:48:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:11,400 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 [2021-11-25 19:48:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:11,424 INFO L225 Difference]: With dead ends: 1041 [2021-11-25 19:48:11,424 INFO L226 Difference]: Without dead ends: 1039 [2021-11-25 19:48:11,426 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:11,435 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 969 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:11,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 670 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:48:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-11-25 19:48:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1031. [2021-11-25 19:48:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 516 states have (on average 2.0949612403100777) internal successors, (1081), 1026 states have internal predecessors, (1081), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1087 transitions. [2021-11-25 19:48:11,576 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1087 transitions. Word has length 3 [2021-11-25 19:48:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:11,577 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1087 transitions. [2021-11-25 19:48:11,577 INFO L471 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) [2021-11-25 19:48:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1087 transitions. [2021-11-25 19:48:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:48:11,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:11,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:48:11,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:11,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:11,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-25 19:48:11,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:11,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966314614] [2021-11-25 19:48:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:11,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:11,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:11,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:48:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:11,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:11,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:11,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:11,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966314614] [2021-11-25 19:48:11,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966314614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:11,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:11,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:48:11,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896780444] [2021-11-25 19:48:11,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:11,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:11,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:11,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:11,983 INFO L87 Difference]: Start difference. First operand 1031 states and 1087 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) [2021-11-25 19:48:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:15,825 INFO L93 Difference]: Finished difference Result 1421 states and 1506 transitions. [2021-11-25 19:48:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:15,830 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 [2021-11-25 19:48:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:15,840 INFO L225 Difference]: With dead ends: 1421 [2021-11-25 19:48:15,841 INFO L226 Difference]: Without dead ends: 1421 [2021-11-25 19:48:15,843 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:15,845 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 419 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:15,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1462 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 19:48:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-11-25 19:48:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1232. [2021-11-25 19:48:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 718 states have (on average 2.0807799442896937) internal successors, (1494), 1227 states have internal predecessors, (1494), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1500 transitions. [2021-11-25 19:48:15,899 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1500 transitions. Word has length 3 [2021-11-25 19:48:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:15,900 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1500 transitions. [2021-11-25 19:48:15,900 INFO L471 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) [2021-11-25 19:48:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1500 transitions. [2021-11-25 19:48:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:48:15,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:15,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:15,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:16,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:16,113 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2021-11-25 19:48:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513644578] [2021-11-25 19:48:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:16,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:16,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:16,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:16,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:48:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:48:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:16,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:16,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:16,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:16,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:16,441 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:48:16,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 16 [2021-11-25 19:48:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:16,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:16,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513644578] [2021-11-25 19:48:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513644578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:16,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:16,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106279858] [2021-11-25 19:48:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:16,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:16,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:16,483 INFO L87 Difference]: Start difference. First operand 1232 states and 1500 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) [2021-11-25 19:48:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:19,973 INFO L93 Difference]: Finished difference Result 1233 states and 1503 transitions. [2021-11-25 19:48:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:19,974 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 [2021-11-25 19:48:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:19,982 INFO L225 Difference]: With dead ends: 1233 [2021-11-25 19:48:19,982 INFO L226 Difference]: Without dead ends: 1233 [2021-11-25 19:48:19,983 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:19,984 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 2009 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2012 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:19,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2012 Valid, 377 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 19:48:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-25 19:48:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1020. [2021-11-25 19:48:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 516 states have (on average 2.0717054263565893) internal successors, (1069), 1015 states have internal predecessors, (1069), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1075 transitions. [2021-11-25 19:48:20,034 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1075 transitions. Word has length 7 [2021-11-25 19:48:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:20,035 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1075 transitions. [2021-11-25 19:48:20,035 INFO L471 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) [2021-11-25 19:48:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1075 transitions. [2021-11-25 19:48:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:48:20,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:20,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:20,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:20,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:20,250 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-25 19:48:20,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:20,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235293693] [2021-11-25 19:48:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:20,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:20,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:20,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:48:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:20,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:20,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:20,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:20,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:20,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235293693] [2021-11-25 19:48:20,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235293693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:20,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:20,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:48:20,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686275832] [2021-11-25 19:48:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:20,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:20,465 INFO L87 Difference]: Start difference. First operand 1020 states and 1075 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) [2021-11-25 19:48:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:23,225 INFO L93 Difference]: Finished difference Result 1349 states and 1433 transitions. [2021-11-25 19:48:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:23,227 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 [2021-11-25 19:48:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:23,236 INFO L225 Difference]: With dead ends: 1349 [2021-11-25 19:48:23,236 INFO L226 Difference]: Without dead ends: 1349 [2021-11-25 19:48:23,236 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:23,238 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 973 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:23,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 1165 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:48:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-11-25 19:48:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 973. [2021-11-25 19:48:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 516 states have (on average 1.9806201550387597) internal successors, (1022), 968 states have internal predecessors, (1022), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1028 transitions. [2021-11-25 19:48:23,273 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1028 transitions. Word has length 8 [2021-11-25 19:48:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:23,273 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1028 transitions. [2021-11-25 19:48:23,274 INFO L471 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) [2021-11-25 19:48:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1028 transitions. [2021-11-25 19:48:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:48:23,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:23,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:23,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 19:48:23,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:23,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:23,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-25 19:48:23,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:23,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200773533] [2021-11-25 19:48:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:23,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:23,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:48:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:23,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:23,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200773533] [2021-11-25 19:48:23,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200773533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:23,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:23,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:48:23,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086810187] [2021-11-25 19:48:23,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:23,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:23,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:23,705 INFO L87 Difference]: Start difference. First operand 973 states and 1028 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) [2021-11-25 19:48:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:27,287 INFO L93 Difference]: Finished difference Result 1428 states and 1515 transitions. [2021-11-25 19:48:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:27,288 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 [2021-11-25 19:48:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:27,297 INFO L225 Difference]: With dead ends: 1428 [2021-11-25 19:48:27,298 INFO L226 Difference]: Without dead ends: 1428 [2021-11-25 19:48:27,298 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:27,299 INFO L933 BasicCegarLoop]: 1129 mSDtfsCounter, 674 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:27,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 1542 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:48:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-25 19:48:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 995. [2021-11-25 19:48:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 548 states have (on average 1.967153284671533) internal successors, (1078), 990 states have internal predecessors, (1078), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1084 transitions. [2021-11-25 19:48:27,334 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1084 transitions. Word has length 8 [2021-11-25 19:48:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:27,334 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1084 transitions. [2021-11-25 19:48:27,335 INFO L471 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) [2021-11-25 19:48:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1084 transitions. [2021-11-25 19:48:27,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:48:27,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:27,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:27,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:27,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:27,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash 871378613, now seen corresponding path program 1 times [2021-11-25 19:48:27,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:27,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036915178] [2021-11-25 19:48:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:27,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:27,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:27,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 19:48:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:48:27,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:27,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:27,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:27,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036915178] [2021-11-25 19:48:27,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036915178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:27,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:27,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:27,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944859546] [2021-11-25 19:48:27,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:27,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:27,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:27,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:27,846 INFO L87 Difference]: Start difference. First operand 995 states and 1084 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:28,679 INFO L93 Difference]: Finished difference Result 1446 states and 1568 transitions. [2021-11-25 19:48:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 19:48:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:28,690 INFO L225 Difference]: With dead ends: 1446 [2021-11-25 19:48:28,691 INFO L226 Difference]: Without dead ends: 1446 [2021-11-25 19:48:28,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:28,692 INFO L933 BasicCegarLoop]: 1080 mSDtfsCounter, 548 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 2925 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:28,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 2925 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:48:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-11-25 19:48:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1236. [2021-11-25 19:48:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 789 states have (on average 1.944233206590621) internal successors, (1534), 1231 states have internal predecessors, (1534), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1540 transitions. [2021-11-25 19:48:28,734 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1540 transitions. Word has length 11 [2021-11-25 19:48:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:28,735 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1540 transitions. [2021-11-25 19:48:28,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1540 transitions. [2021-11-25 19:48:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:48:28,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:28,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:28,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:28,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:28,950 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr529ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1242933253, now seen corresponding path program 1 times [2021-11-25 19:48:28,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:28,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181808988] [2021-11-25 19:48:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:28,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:28,957 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:29,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:48:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:48:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:29,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:29,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:29,289 INFO L354 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2021-11-25 19:48:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 29 treesize of output 36 [2021-11-25 19:48:29,354 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 19:48:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 60 treesize of output 20 [2021-11-25 19:48:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:29,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:29,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:29,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181808988] [2021-11-25 19:48:29,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181808988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:29,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:29,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:29,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825762022] [2021-11-25 19:48:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:29,415 INFO L87 Difference]: Start difference. First operand 1236 states and 1540 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:31,010 INFO L93 Difference]: Finished difference Result 1592 states and 1955 transitions. [2021-11-25 19:48:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 19:48:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:31,021 INFO L225 Difference]: With dead ends: 1592 [2021-11-25 19:48:31,021 INFO L226 Difference]: Without dead ends: 1592 [2021-11-25 19:48:31,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:31,023 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 352 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:31,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 2835 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 48 Unchecked, 1.5s Time] [2021-11-25 19:48:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-11-25 19:48:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1235. [2021-11-25 19:48:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 788 states have (on average 1.9441624365482233) internal successors, (1532), 1230 states have internal predecessors, (1532), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1538 transitions. [2021-11-25 19:48:31,063 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1538 transitions. Word has length 12 [2021-11-25 19:48:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:31,063 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1538 transitions. [2021-11-25 19:48:31,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1538 transitions. [2021-11-25 19:48:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:48:31,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:31,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:31,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:31,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:31,279 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-25 19:48:31,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:31,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959615172] [2021-11-25 19:48:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:31,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:31,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:31,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 19:48:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:48:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:31,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:31,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959615172] [2021-11-25 19:48:31,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959615172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:31,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:31,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:31,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610076277] [2021-11-25 19:48:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:31,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:31,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:31,523 INFO L87 Difference]: Start difference. First operand 1235 states and 1538 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) [2021-11-25 19:48:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:31,555 INFO L93 Difference]: Finished difference Result 1175 states and 1452 transitions. [2021-11-25 19:48:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:31,555 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 [2021-11-25 19:48:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:31,563 INFO L225 Difference]: With dead ends: 1175 [2021-11-25 19:48:31,564 INFO L226 Difference]: Without dead ends: 1175 [2021-11-25 19:48:31,564 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:31,565 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 955 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 993 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 [2021-11-25 19:48:31,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 993 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-25 19:48:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2021-11-25 19:48:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 752 states have (on average 1.922872340425532) internal successors, (1446), 1170 states have internal predecessors, (1446), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1452 transitions. [2021-11-25 19:48:31,598 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1452 transitions. Word has length 18 [2021-11-25 19:48:31,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:31,599 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1452 transitions. [2021-11-25 19:48:31,599 INFO L471 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) [2021-11-25 19:48:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1452 transitions. [2021-11-25 19:48:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:48:31,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:31,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:31,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:31,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:31,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:31,814 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-25 19:48:31,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:31,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298105211] [2021-11-25 19:48:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:31,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:31,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:31,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:31,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 19:48:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:32,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:32,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:32,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:32,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298105211] [2021-11-25 19:48:32,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298105211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:32,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:32,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:32,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111305192] [2021-11-25 19:48:32,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:32,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:32,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:32,117 INFO L87 Difference]: Start difference. First operand 1175 states and 1452 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) [2021-11-25 19:48:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:32,209 INFO L93 Difference]: Finished difference Result 1147 states and 1396 transitions. [2021-11-25 19:48:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:32,210 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 [2021-11-25 19:48:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:32,215 INFO L225 Difference]: With dead ends: 1147 [2021-11-25 19:48:32,215 INFO L226 Difference]: Without dead ends: 1147 [2021-11-25 19:48:32,216 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:32,217 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 926 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:32,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 1867 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-25 19:48:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1145. [2021-11-25 19:48:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 736 states have (on average 1.8858695652173914) internal successors, (1388), 1140 states have internal predecessors, (1388), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1394 transitions. [2021-11-25 19:48:32,279 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1394 transitions. Word has length 20 [2021-11-25 19:48:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:32,280 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1394 transitions. [2021-11-25 19:48:32,280 INFO L471 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) [2021-11-25 19:48:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1394 transitions. [2021-11-25 19:48:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:48:32,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:32,282 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:32,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:32,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:32,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-25 19:48:32,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328824307] [2021-11-25 19:48:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:32,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:32,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:32,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:48:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:32,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:32,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:32,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328824307] [2021-11-25 19:48:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328824307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:32,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:32,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232376235] [2021-11-25 19:48:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:32,853 INFO L87 Difference]: Start difference. First operand 1145 states and 1394 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) [2021-11-25 19:48:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:35,390 INFO L93 Difference]: Finished difference Result 1606 states and 1976 transitions. [2021-11-25 19:48:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:35,392 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 [2021-11-25 19:48:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:35,399 INFO L225 Difference]: With dead ends: 1606 [2021-11-25 19:48:35,399 INFO L226 Difference]: Without dead ends: 1606 [2021-11-25 19:48:35,400 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:35,400 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 1679 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:35,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1679 Valid, 1004 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:48:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-25 19:48:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1141. [2021-11-25 19:48:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 736 states have (on average 1.875) internal successors, (1380), 1136 states have internal predecessors, (1380), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1386 transitions. [2021-11-25 19:48:35,434 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1386 transitions. Word has length 34 [2021-11-25 19:48:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:35,435 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1386 transitions. [2021-11-25 19:48:35,435 INFO L471 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) [2021-11-25 19:48:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1386 transitions. [2021-11-25 19:48:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:48:35,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:35,437 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:35,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:35,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:35,652 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-25 19:48:35,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:35,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779777450] [2021-11-25 19:48:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:35,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:35,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 19:48:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:48:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:35,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:36,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:36,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:36,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779777450] [2021-11-25 19:48:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779777450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:36,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:36,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:36,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568036549] [2021-11-25 19:48:36,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:36,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:36,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:36,188 INFO L87 Difference]: Start difference. First operand 1141 states and 1386 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) [2021-11-25 19:48:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:40,479 INFO L93 Difference]: Finished difference Result 1742 states and 2136 transitions. [2021-11-25 19:48:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:40,481 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 [2021-11-25 19:48:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:40,490 INFO L225 Difference]: With dead ends: 1742 [2021-11-25 19:48:40,491 INFO L226 Difference]: Without dead ends: 1742 [2021-11-25 19:48:40,491 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:40,492 INFO L933 BasicCegarLoop]: 1175 mSDtfsCounter, 1158 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:40,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 2013 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 19:48:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-11-25 19:48:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1137. [2021-11-25 19:48:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 736 states have (on average 1.8641304347826086) internal successors, (1372), 1132 states have internal predecessors, (1372), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1378 transitions. [2021-11-25 19:48:40,528 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1378 transitions. Word has length 34 [2021-11-25 19:48:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:40,528 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1378 transitions. [2021-11-25 19:48:40,529 INFO L471 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) [2021-11-25 19:48:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1378 transitions. [2021-11-25 19:48:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:48:40,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:40,531 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:40,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:40,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:40,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-25 19:48:40,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137941125] [2021-11-25 19:48:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:40,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:40,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:40,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 19:48:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:41,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:41,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:41,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137941125] [2021-11-25 19:48:41,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137941125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:41,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:41,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:41,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445249236] [2021-11-25 19:48:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:41,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:41,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:41,220 INFO L87 Difference]: Start difference. First operand 1137 states and 1378 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:41,298 INFO L93 Difference]: Finished difference Result 1125 states and 1358 transitions. [2021-11-25 19:48:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:41,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 19:48:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:41,306 INFO L225 Difference]: With dead ends: 1125 [2021-11-25 19:48:41,317 INFO L226 Difference]: Without dead ends: 1125 [2021-11-25 19:48:41,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:41,319 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 902 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:41,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1845 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-25 19:48:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1125. [2021-11-25 19:48:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 724 states have (on average 1.867403314917127) internal successors, (1352), 1120 states have internal predecessors, (1352), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1358 transitions. [2021-11-25 19:48:41,349 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1358 transitions. Word has length 52 [2021-11-25 19:48:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:41,350 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1358 transitions. [2021-11-25 19:48:41,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:48:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1358 transitions. [2021-11-25 19:48:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:48:41,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:41,354 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:41,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:41,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:41,571 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-25 19:48:41,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:41,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201952260] [2021-11-25 19:48:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:41,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:41,575 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:41,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:48:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:48:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:42,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:42,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:42,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:48:42,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 16 [2021-11-25 19:48:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:43,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:43,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201952260] [2021-11-25 19:48:43,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201952260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:43,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:43,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:43,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740264716] [2021-11-25 19:48:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:43,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:43,008 INFO L87 Difference]: Start difference. First operand 1125 states and 1358 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) [2021-11-25 19:48:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:46,386 INFO L93 Difference]: Finished difference Result 1537 states and 1895 transitions. [2021-11-25 19:48:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:46,388 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 [2021-11-25 19:48:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:46,395 INFO L225 Difference]: With dead ends: 1537 [2021-11-25 19:48:46,395 INFO L226 Difference]: Without dead ends: 1537 [2021-11-25 19:48:46,395 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:46,396 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 2043 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2046 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:46,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2046 Valid, 462 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 19:48:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-25 19:48:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1055. [2021-11-25 19:48:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 692 states have (on average 1.8034682080924855) internal successors, (1248), 1050 states have internal predecessors, (1248), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1254 transitions. [2021-11-25 19:48:46,421 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1254 transitions. Word has length 60 [2021-11-25 19:48:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:46,422 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1254 transitions. [2021-11-25 19:48:46,422 INFO L471 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) [2021-11-25 19:48:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1254 transitions. [2021-11-25 19:48:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:48:46,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:46,424 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:46,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:46,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:46,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-25 19:48:46,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:46,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426823059] [2021-11-25 19:48:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:46,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:46,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:46,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 19:48:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:48:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:47,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:47,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:48:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:47,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:47,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:47,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426823059] [2021-11-25 19:48:47,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426823059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:47,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:47,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:47,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439385719] [2021-11-25 19:48:47,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:47,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:48:47,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:48:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:47,195 INFO L87 Difference]: Start difference. First operand 1055 states and 1254 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) [2021-11-25 19:48:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:50,082 INFO L93 Difference]: Finished difference Result 1054 states and 1253 transitions. [2021-11-25 19:48:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:48:50,083 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 [2021-11-25 19:48:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:50,088 INFO L225 Difference]: With dead ends: 1054 [2021-11-25 19:48:50,089 INFO L226 Difference]: Without dead ends: 1054 [2021-11-25 19:48:50,089 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:50,090 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 4 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:50,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2237 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:48:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-11-25 19:48:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2021-11-25 19:48:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 692 states have (on average 1.8020231213872833) internal successors, (1247), 1049 states have internal predecessors, (1247), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1253 transitions. [2021-11-25 19:48:50,113 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1253 transitions. Word has length 65 [2021-11-25 19:48:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:50,113 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1253 transitions. [2021-11-25 19:48:50,114 INFO L471 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) [2021-11-25 19:48:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1253 transitions. [2021-11-25 19:48:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:48:50,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:50,115 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:50,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:50,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:50,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-25 19:48:50,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:50,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315120892] [2021-11-25 19:48:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:50,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:50,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:50,354 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:50,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 19:48:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:48:50,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:50,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:50,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:50,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:50,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:50,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:50,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:50,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315120892] [2021-11-25 19:48:50,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315120892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:50,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:50,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:50,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672991152] [2021-11-25 19:48:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:50,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:48:50,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:48:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:48:50,991 INFO L87 Difference]: Start difference. First operand 1054 states and 1253 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) [2021-11-25 19:48:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:55,448 INFO L93 Difference]: Finished difference Result 1053 states and 1252 transitions. [2021-11-25 19:48:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:48:55,449 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 [2021-11-25 19:48:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:55,455 INFO L225 Difference]: With dead ends: 1053 [2021-11-25 19:48:55,455 INFO L226 Difference]: Without dead ends: 1053 [2021-11-25 19:48:55,456 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:55,457 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 2 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:55,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2278 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 19:48:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-11-25 19:48:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1053. [2021-11-25 19:48:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 691 states have (on average 1.8031837916063675) internal successors, (1246), 1048 states have internal predecessors, (1246), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:48:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1252 transitions. [2021-11-25 19:48:55,481 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1252 transitions. Word has length 65 [2021-11-25 19:48:55,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:55,482 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 1252 transitions. [2021-11-25 19:48:55,482 INFO L471 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) [2021-11-25 19:48:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1252 transitions. [2021-11-25 19:48:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:48:55,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:55,484 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:55,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:55,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:55,702 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1702947151, now seen corresponding path program 1 times [2021-11-25 19:48:55,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:55,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277615077] [2021-11-25 19:48:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:55,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:55,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:55,705 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:55,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:48:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:56,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:56,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:56,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277615077] [2021-11-25 19:48:56,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277615077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:56,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:56,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:48:56,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913824013] [2021-11-25 19:48:56,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:56,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:56,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:56,240 INFO L87 Difference]: Start difference. First operand 1053 states and 1252 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) [2021-11-25 19:48:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:56,304 INFO L93 Difference]: Finished difference Result 1056 states and 1256 transitions. [2021-11-25 19:48:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:56,306 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 [2021-11-25 19:48:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:56,327 INFO L225 Difference]: With dead ends: 1056 [2021-11-25 19:48:56,327 INFO L226 Difference]: Without dead ends: 1056 [2021-11-25 19:48:56,328 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:56,332 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 2 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2635 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 [2021-11-25 19:48:56,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2635 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-11-25 19:48:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2021-11-25 19:48:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 693 states have (on average 1.8023088023088023) internal successors, (1249), 1051 states have internal predecessors, (1249), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:48:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1256 transitions. [2021-11-25 19:48:56,373 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1256 transitions. Word has length 73 [2021-11-25 19:48:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:56,374 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1256 transitions. [2021-11-25 19:48:56,374 INFO L471 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) [2021-11-25 19:48:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1256 transitions. [2021-11-25 19:48:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:48:56,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:56,376 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:56,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:56,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:48:56,589 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:48:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:56,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2021354046, now seen corresponding path program 1 times [2021-11-25 19:48:56,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:48:56,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572183726] [2021-11-25 19:48:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:56,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:48:56,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:48:56,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:48:56,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 19:48:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:57,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:57,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:57,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:48:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572183726] [2021-11-25 19:48:57,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572183726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:57,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [126866208] [2021-11-25 19:48:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:57,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:48:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:48:57,429 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:48:57,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-25 19:48:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:58,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:58,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:58,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [126866208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:58,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477939771] [2021-11-25 19:48:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:58,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:58,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:58,475 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:58,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 19:48:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:58,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:59,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477939771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:59,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:48:59,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 19:48:59,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771180192] [2021-11-25 19:48:59,148 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:59,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:48:59,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:48:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:48:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:48:59,150 INFO L87 Difference]: Start difference. First operand 1056 states and 1256 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) [2021-11-25 19:48:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:59,345 INFO L93 Difference]: Finished difference Result 1068 states and 1273 transitions. [2021-11-25 19:48:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:48:59,346 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 [2021-11-25 19:48:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:59,354 INFO L225 Difference]: With dead ends: 1068 [2021-11-25 19:48:59,355 INFO L226 Difference]: Without dead ends: 1068 [2021-11-25 19:48:59,355 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:59,356 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 23 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:59,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2638 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-25 19:48:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1066. [2021-11-25 19:48:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 702 states have (on average 1.8005698005698005) internal successors, (1264), 1060 states have internal predecessors, (1264), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:48:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1271 transitions. [2021-11-25 19:48:59,384 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1271 transitions. Word has length 74 [2021-11-25 19:48:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:59,384 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1271 transitions. [2021-11-25 19:48:59,385 INFO L471 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) [2021-11-25 19:48:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1271 transitions. [2021-11-25 19:48:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:48:59,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:59,386 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:59,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:59,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:59,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-25 19:49:00,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:00,008 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:49:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1623069169, now seen corresponding path program 2 times [2021-11-25 19:49:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:00,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532527698] [2021-11-25 19:49:00,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:49:00,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:00,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:00,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:00,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 19:49:00,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:49:00,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:49:00,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:00,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:01,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:01,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532527698] [2021-11-25 19:49:01,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532527698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:01,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [246250805] [2021-11-25 19:49:01,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:49:01,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:49:01,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:49:01,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:49:01,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-25 19:49:03,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:49:03,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:49:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:03,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:03,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [246250805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:03,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342227448] [2021-11-25 19:49:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:49:03,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:03,569 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:03,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 19:49:45,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:49:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:45,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:49:45,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:45,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:45,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:45,894 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:49:45,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 17 [2021-11-25 19:49:45,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:45,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:49:46,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2021-11-25 19:49:46,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2021-11-25 19:49:46,339 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1589 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1589) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1590 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1590)))) is different from true [2021-11-25 19:49:46,355 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1591) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1592 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1592) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 19:49:46,380 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1593 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1593) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1594 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1594) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 19:49:46,447 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:49:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 19:49:46,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 24 [2021-11-25 19:49:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2021-11-25 19:49:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2021-11-25 19:49:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 19:49:46,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:46,983 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1605 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1606 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem36#1.base| v_ArrVal_1605) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem36#1.base| v_ArrVal_1606) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_1605 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem36#1.base| v_ArrVal_1605) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2021-11-25 19:49:46,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342227448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:46,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:49:46,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11] total 24 [2021-11-25 19:49:46,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931348041] [2021-11-25 19:49:46,990 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:46,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:49:46,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:49:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=16, NotChecked=180, Total=702 [2021-11-25 19:49:46,992 INFO L87 Difference]: Start difference. First operand 1066 states and 1271 transitions. Second operand has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:48,660 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c_#Ultimate.C_memset_#amount| (_ bv44 32))) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1593 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1593) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1594 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1594) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 19:49:48,988 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1589 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1589) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1593 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1593) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1590 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1590))) (exists ((v_ArrVal_1594 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1594) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1591) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1592 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1592) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 19:49:48,992 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1593 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1593) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_1594 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1594) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1591) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1592 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1592) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 19:50:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:00,386 INFO L93 Difference]: Finished difference Result 1548 states and 1892 transitions. [2021-11-25 19:50:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 19:50:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2021-11-25 19:50:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:00,399 INFO L225 Difference]: With dead ends: 1548 [2021-11-25 19:50:00,399 INFO L226 Difference]: Without dead ends: 1544 [2021-11-25 19:50:00,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=327, Invalid=1523, Unknown=70, NotChecked=630, Total=2550 [2021-11-25 19:50:00,401 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 801 mSDsluCounter, 5989 mSDsCounter, 0 mSdLazyCounter, 6770 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 6469 SdHoareTripleChecker+Invalid, 11019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4232 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:00,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 6469 Invalid, 11019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6770 Invalid, 0 Unknown, 4232 Unchecked, 11.6s Time] [2021-11-25 19:50:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-11-25 19:50:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1082. [2021-11-25 19:50:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 717 states have (on average 1.7935843793584378) internal successors, (1286), 1075 states have internal predecessors, (1286), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:50:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1294 transitions. [2021-11-25 19:50:00,431 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1294 transitions. Word has length 77 [2021-11-25 19:50:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:00,432 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1294 transitions. [2021-11-25 19:50:00,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:50:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1294 transitions. [2021-11-25 19:50:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:50:00,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:00,433 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:00,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:00,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:00,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:01,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:50:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1472732225, now seen corresponding path program 1 times [2021-11-25 19:50:01,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:01,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248304172] [2021-11-25 19:50:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:01,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:01,052 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:01,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-25 19:50:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:01,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:02,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248304172] [2021-11-25 19:50:02,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248304172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [851709424] [2021-11-25 19:50:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:02,288 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:02,297 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:02,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-25 19:50:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:02,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:03,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:03,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [851709424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:03,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430389213] [2021-11-25 19:50:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:03,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:03,412 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:03,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 19:50:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:50:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:03,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:04,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430389213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:04,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:50:04,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 35 [2021-11-25 19:50:04,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912197148] [2021-11-25 19:50:04,870 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:04,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 19:50:04,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 19:50:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:50:04,872 INFO L87 Difference]: Start difference. First operand 1082 states and 1294 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2021-11-25 19:50:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:08,066 INFO L93 Difference]: Finished difference Result 1114 states and 1334 transitions. [2021-11-25 19:50:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 19:50:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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 82 [2021-11-25 19:50:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:08,074 INFO L225 Difference]: With dead ends: 1114 [2021-11-25 19:50:08,074 INFO L226 Difference]: Without dead ends: 1106 [2021-11-25 19:50:08,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1371, Invalid=2789, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 19:50:08,078 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 132 mSDsluCounter, 10606 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 11494 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:08,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 11494 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:50:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-25 19:50:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1090. [2021-11-25 19:50:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 726 states have (on average 1.7837465564738293) internal successors, (1295), 1084 states have internal predecessors, (1295), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:50:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1302 transitions. [2021-11-25 19:50:08,108 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1302 transitions. Word has length 82 [2021-11-25 19:50:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:08,108 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1302 transitions. [2021-11-25 19:50:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2021-11-25 19:50:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1302 transitions. [2021-11-25 19:50:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 19:50:08,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:08,110 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:08,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-25 19:50:08,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:08,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:08,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:08,729 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-25 19:50:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -830324465, now seen corresponding path program 3 times [2021-11-25 19:50:08,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:08,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143757562] [2021-11-25 19:50:08,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:08,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:08,731 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:08,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-25 19:50:10,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 19:50:10,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:50:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:10,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:13,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:13,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143757562] [2021-11-25 19:50:13,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143757562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:13,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565835106] [2021-11-25 19:50:13,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:13,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:13,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:13,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-25 19:50:39,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 19:50:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:39,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:50:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:39,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [565835106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:40,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016615526] [2021-11-25 19:50:40,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:40,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:40,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:40,608 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:40,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f860a6e-dde4-47c5-9012-3aad7984f9cf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process