./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:57:34,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:57:34,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:57:34,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:57:34,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:57:34,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:57:34,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:57:34,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:57:34,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:57:34,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:57:34,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:57:34,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:57:34,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:57:34,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:57:34,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:57:34,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:57:34,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:57:34,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:57:34,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:57:34,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:57:34,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:57:34,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:57:34,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:57:34,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:57:34,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:57:34,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:57:34,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:57:34,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:57:34,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:57:34,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:57:34,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:57:34,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:57:34,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:57:34,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:57:34,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:57:34,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:57:34,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:57:34,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:57:34,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:57:34,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:57:34,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:57:34,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:57:34,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:57:34,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:57:34,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:57:34,299 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:57:34,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:57:34,300 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:57:34,300 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:57:34,300 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:57:34,307 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:57:34,307 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:57:34,308 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:57:34,309 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:57:34,309 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:57:34,309 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:57:34,309 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:57:34,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:57:34,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:57:34,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:57:34,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:57:34,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:57:34,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:57:34,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:57:34,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:57:34,312 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:57:34,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:57:34,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:57:34,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:57:34,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:57:34,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:57:34,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:57:34,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:34,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:57:34,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:57:34,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:57:34,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:57:34,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:57:34,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:57:34,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:57:34,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:57:34,317 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-07 00:57:34,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:57:34,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:57:34,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:57:34,649 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:57:34,650 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:57:34,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-07 00:57:34,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/8227050f3/c92ecd5927244731aec08788fd7e815b/FLAGe30ab37d0 [2021-11-07 00:57:35,443 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:57:35,443 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-07 00:57:35,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/8227050f3/c92ecd5927244731aec08788fd7e815b/FLAGe30ab37d0 [2021-11-07 00:57:35,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/8227050f3/c92ecd5927244731aec08788fd7e815b [2021-11-07 00:57:35,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:57:35,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:57:35,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:35,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:57:35,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:57:35,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:35" (1/1) ... [2021-11-07 00:57:35,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407e5d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:35, skipping insertion in model container [2021-11-07 00:57:35,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:35" (1/1) ... [2021-11-07 00:57:35,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:57:35,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:35,961 WARN L228 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-07 00:57:36,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:36,342 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) [2021-11-07 00:57:36,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66ebcc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:36, skipping insertion in model container [2021-11-07 00:57:36,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:36,343 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:57:36,345 INFO L168 Benchmark]: Toolchain (without parser) took 715.90 ms. Allocated memory is still 151.0 MB. Free memory was 106.5 MB in the beginning and 109.4 MB in the end (delta: -2.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 00:57:36,347 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 125.8 MB in the end (delta: 71.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:57:36,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.45 ms. Allocated memory is still 151.0 MB. Free memory was 106.3 MB in the beginning and 109.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 00:57:36,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 125.8 MB in the end (delta: 71.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 712.45 ms. Allocated memory is still 151.0 MB. Free memory was 106.3 MB in the beginning and 109.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 759]: 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:57:38,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:57:38,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:57:38,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:57:38,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:57:38,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:57:38,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:57:38,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:57:38,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:57:38,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:57:38,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:57:38,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:57:38,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:57:38,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:57:38,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:57:38,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:57:38,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:57:38,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:57:38,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:57:38,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:57:38,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:57:38,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:57:38,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:57:38,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:57:38,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:57:38,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:57:38,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:57:38,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:57:38,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:57:38,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:57:38,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:57:38,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:57:38,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:57:38,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:57:38,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:57:38,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:57:38,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:57:38,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:57:38,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:57:38,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:57:38,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:57:38,724 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:57:38,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:57:38,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:57:38,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:57:38,777 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:57:38,777 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:57:38,777 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:57:38,778 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:57:38,778 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:57:38,778 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:57:38,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:57:38,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:57:38,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:57:38,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:57:38,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:57:38,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:57:38,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:57:38,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:57:38,782 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:57:38,782 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:57:38,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:57:38,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:57:38,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:57:38,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:57:38,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:57:38,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:57:38,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:57:38,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:38,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:57:38,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:57:38,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:57:38,785 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:57:38,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:38,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:57:38,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:57:38,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:57:38,786 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-07 00:57:39,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:57:39,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:57:39,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:57:39,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:57:39,242 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:57:39,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-07 00:57:39,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/02a4195b1/cc4abed26207499d9d5f7d01eef52461/FLAG91ae0d3f4 [2021-11-07 00:57:40,033 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:57:40,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-07 00:57:40,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/02a4195b1/cc4abed26207499d9d5f7d01eef52461/FLAG91ae0d3f4 [2021-11-07 00:57:40,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/data/02a4195b1/cc4abed26207499d9d5f7d01eef52461 [2021-11-07 00:57:40,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:57:40,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:57:40,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:40,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:57:40,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:57:40,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:40" (1/1) ... [2021-11-07 00:57:40,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e9e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:40, skipping insertion in model container [2021-11-07 00:57:40,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:40" (1/1) ... [2021-11-07 00:57:40,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:57:40,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:40,411 WARN L228 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-07 00:57:40,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:40,859 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:57:40,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:40,886 WARN L228 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-07 00:57:41,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:41,075 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:57:41,090 WARN L228 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_0d5f0618-a757-4693-ad2b-ccb79425e6ff/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-07 00:57:41,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:41,213 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:57:41,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41 WrapperNode [2021-11-07 00:57:41,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:41,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:57:41,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:57:41,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:57:41,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:57:41,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:57:41,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:57:41,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:57:41,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:41,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:42,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:57:42,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:57:42,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:57:42,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:57:42,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (1/1) ... [2021-11-07 00:57:42,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:42,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:42,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:57:42,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:57:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:57:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:57:42,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:57:42,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:57:54,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:57:54,813 INFO L299 CfgBuilder]: Removed 993 assume(true) statements. [2021-11-07 00:57:54,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:57:54 BoogieIcfgContainer [2021-11-07 00:57:54,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:57:54,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:57:54,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:57:54,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:57:54,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:57:40" (1/3) ... [2021-11-07 00:57:54,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a171637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:57:54, skipping insertion in model container [2021-11-07 00:57:54,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:41" (2/3) ... [2021-11-07 00:57:54,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a171637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:57:54, skipping insertion in model container [2021-11-07 00:57:54,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:57:54" (3/3) ... [2021-11-07 00:57:54,831 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2021-11-07 00:57:54,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:57:54,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 00:57:54,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:57:54,933 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-07 00:57:54,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 00:57:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 4583 states, 4577 states have (on average 1.8973126502075595) internal successors, (8684), 4582 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 00:57:55,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:55,037 INFO L513 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] [2021-11-07 00:57:55,038 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2055578945, now seen corresponding path program 1 times [2021-11-07 00:57:55,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:55,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058518418] [2021-11-07 00:57:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:55,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:55,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:55,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:55,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:57:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:57:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:55,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:55,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:55,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058518418] [2021-11-07 00:57:55,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058518418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:55,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:55,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:57:55,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060690949] [2021-11-07 00:57:55,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:57:55,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:57:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:57:55,668 INFO L87 Difference]: Start difference. First operand has 4583 states, 4577 states have (on average 1.8973126502075595) internal successors, (8684), 4582 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:55,815 INFO L93 Difference]: Finished difference Result 4602 states and 8707 transitions. [2021-11-07 00:57:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:57:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 00:57:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:55,867 INFO L225 Difference]: With dead ends: 4602 [2021-11-07 00:57:55,867 INFO L226 Difference]: Without dead ends: 4579 [2021-11-07 00:57:55,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:57:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-11-07 00:57:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2021-11-07 00:57:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4574 states have (on average 1.8959335373852209) internal successors, (8672), 4578 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 8672 transitions. [2021-11-07 00:57:56,086 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 8672 transitions. Word has length 36 [2021-11-07 00:57:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:56,087 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 8672 transitions. [2021-11-07 00:57:56,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 8672 transitions. [2021-11-07 00:57:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 00:57:56,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:56,092 INFO L513 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] [2021-11-07 00:57:56,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:56,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:56,312 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash -57168402, now seen corresponding path program 1 times [2021-11-07 00:57:56,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:56,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788461093] [2021-11-07 00:57:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:56,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:56,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:56,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:56,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:57:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:56,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:56,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:56,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788461093] [2021-11-07 00:57:56,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788461093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:56,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:56,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:56,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059603719] [2021-11-07 00:57:56,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:56,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:56,906 INFO L87 Difference]: Start difference. First operand 4579 states and 8672 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:57,504 INFO L93 Difference]: Finished difference Result 13657 states and 25873 transitions. [2021-11-07 00:57:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:57,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 38 [2021-11-07 00:57:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:57,570 INFO L225 Difference]: With dead ends: 13657 [2021-11-07 00:57:57,570 INFO L226 Difference]: Without dead ends: 9091 [2021-11-07 00:57:57,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-11-07 00:57:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 4579. [2021-11-07 00:57:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4574 states have (on average 1.894403148229121) internal successors, (8665), 4578 states have internal predecessors, (8665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 8665 transitions. [2021-11-07 00:57:57,817 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 8665 transitions. Word has length 38 [2021-11-07 00:57:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:57,818 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 8665 transitions. [2021-11-07 00:57:57,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 8665 transitions. [2021-11-07 00:57:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 00:57:57,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:57,829 INFO L513 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] [2021-11-07 00:57:57,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:58,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:58,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:57:58,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:58,055 INFO L85 PathProgramCache]: Analyzing trace with hash 21648817, now seen corresponding path program 1 times [2021-11-07 00:57:58,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:58,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989778059] [2021-11-07 00:57:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:58,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:58,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:58,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:57:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:57:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:58,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:58,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:58,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989778059] [2021-11-07 00:57:58,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989778059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:58,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:58,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:57:58,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730550626] [2021-11-07 00:57:58,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:58,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:58,680 INFO L87 Difference]: Start difference. First operand 4579 states and 8665 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:00,409 INFO L93 Difference]: Finished difference Result 31528 states and 59707 transitions. [2021-11-07 00:58:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:58:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 00:58:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:00,566 INFO L225 Difference]: With dead ends: 31528 [2021-11-07 00:58:00,567 INFO L226 Difference]: Without dead ends: 26971 [2021-11-07 00:58:00,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26971 states. [2021-11-07 00:58:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26971 to 4557. [2021-11-07 00:58:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4552 states have (on average 1.8923550087873462) internal successors, (8614), 4556 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 8614 transitions. [2021-11-07 00:58:00,988 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 8614 transitions. Word has length 44 [2021-11-07 00:58:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:00,988 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 8614 transitions. [2021-11-07 00:58:00,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 8614 transitions. [2021-11-07 00:58:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 00:58:00,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:00,991 INFO L513 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] [2021-11-07 00:58:01,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:01,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:01,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1565983856, now seen corresponding path program 1 times [2021-11-07 00:58:01,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:01,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162472985] [2021-11-07 00:58:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:01,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:01,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:01,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:01,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:58:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:01,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:01,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:02,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:02,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162472985] [2021-11-07 00:58:02,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162472985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:02,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:02,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:58:02,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004320997] [2021-11-07 00:58:02,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:02,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:02,026 INFO L87 Difference]: Start difference. First operand 4557 states and 8614 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:02,714 INFO L93 Difference]: Finished difference Result 13568 states and 25677 transitions. [2021-11-07 00:58:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:02,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 00:58:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:02,740 INFO L225 Difference]: With dead ends: 13568 [2021-11-07 00:58:02,740 INFO L226 Difference]: Without dead ends: 9033 [2021-11-07 00:58:02,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2021-11-07 00:58:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 4557. [2021-11-07 00:58:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4552 states have (on average 1.8899384885764499) internal successors, (8603), 4556 states have internal predecessors, (8603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 8603 transitions. [2021-11-07 00:58:03,055 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 8603 transitions. Word has length 46 [2021-11-07 00:58:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:03,055 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 8603 transitions. [2021-11-07 00:58:03,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 8603 transitions. [2021-11-07 00:58:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 00:58:03,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:03,058 INFO L513 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] [2021-11-07 00:58:03,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:03,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:03,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash -487017605, now seen corresponding path program 1 times [2021-11-07 00:58:03,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:03,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819634377] [2021-11-07 00:58:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:03,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:03,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:03,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:03,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:58:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:58:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:03,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:03,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:03,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819634377] [2021-11-07 00:58:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819634377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:03,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:03,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060442110] [2021-11-07 00:58:03,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:03,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:03,988 INFO L87 Difference]: Start difference. First operand 4557 states and 8603 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:06,996 INFO L93 Difference]: Finished difference Result 49371 states and 93467 transitions. [2021-11-07 00:58:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:58:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2021-11-07 00:58:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:07,118 INFO L225 Difference]: With dead ends: 49371 [2021-11-07 00:58:07,119 INFO L226 Difference]: Without dead ends: 44839 [2021-11-07 00:58:07,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:58:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44839 states. [2021-11-07 00:58:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44839 to 4559. [2021-11-07 00:58:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4554 states have (on average 1.888449714536671) internal successors, (8600), 4558 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 8600 transitions. [2021-11-07 00:58:07,590 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 8600 transitions. Word has length 52 [2021-11-07 00:58:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:07,590 INFO L470 AbstractCegarLoop]: Abstraction has 4559 states and 8600 transitions. [2021-11-07 00:58:07,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 8600 transitions. [2021-11-07 00:58:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 00:58:07,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:07,592 INFO L513 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] [2021-11-07 00:58:07,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:07,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:07,807 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:07,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2009209288, now seen corresponding path program 1 times [2021-11-07 00:58:07,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:07,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188943614] [2021-11-07 00:58:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:07,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:07,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:07,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:07,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:58:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:58:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:08,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:08,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:08,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188943614] [2021-11-07 00:58:08,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188943614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:08,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:08,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:08,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861054199] [2021-11-07 00:58:08,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:08,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:08,695 INFO L87 Difference]: Start difference. First operand 4559 states and 8600 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:11,383 INFO L93 Difference]: Finished difference Result 49339 states and 93388 transitions. [2021-11-07 00:58:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:58:11,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 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 54 [2021-11-07 00:58:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:11,473 INFO L225 Difference]: With dead ends: 49339 [2021-11-07 00:58:11,473 INFO L226 Difference]: Without dead ends: 44807 [2021-11-07 00:58:11,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:58:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44807 states. [2021-11-07 00:58:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44807 to 4563. [2021-11-07 00:58:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4558 states have (on average 1.8874506362439667) internal successors, (8603), 4562 states have internal predecessors, (8603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 8603 transitions. [2021-11-07 00:58:12,123 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 8603 transitions. Word has length 54 [2021-11-07 00:58:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:12,123 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 8603 transitions. [2021-11-07 00:58:12,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 8603 transitions. [2021-11-07 00:58:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 00:58:12,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:12,125 INFO L513 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] [2021-11-07 00:58:12,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:12,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:12,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1111183621, now seen corresponding path program 1 times [2021-11-07 00:58:12,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:12,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892999962] [2021-11-07 00:58:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:12,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:12,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:12,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:58:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:12,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:12,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:13,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:13,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892999962] [2021-11-07 00:58:13,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892999962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:13,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:13,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:58:13,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031974838] [2021-11-07 00:58:13,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:13,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:13,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:13,039 INFO L87 Difference]: Start difference. First operand 4563 states and 8603 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:13,245 INFO L93 Difference]: Finished difference Result 9074 states and 17137 transitions. [2021-11-07 00:58:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 56 [2021-11-07 00:58:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:13,257 INFO L225 Difference]: With dead ends: 9074 [2021-11-07 00:58:13,257 INFO L226 Difference]: Without dead ends: 4542 [2021-11-07 00:58:13,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-11-07 00:58:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 4542. [2021-11-07 00:58:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4537 states have (on average 1.8878113290720742) internal successors, (8565), 4541 states have internal predecessors, (8565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 8565 transitions. [2021-11-07 00:58:13,517 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 8565 transitions. Word has length 56 [2021-11-07 00:58:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:13,519 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 8565 transitions. [2021-11-07 00:58:13,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 8565 transitions. [2021-11-07 00:58:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 00:58:13,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:13,521 INFO L513 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] [2021-11-07 00:58:13,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:13,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:13,737 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -368223325, now seen corresponding path program 1 times [2021-11-07 00:58:13,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:13,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943409541] [2021-11-07 00:58:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:13,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:13,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:13,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:58:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:58:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:14,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:14,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:14,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943409541] [2021-11-07 00:58:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943409541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:14,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:14,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:58:14,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286041229] [2021-11-07 00:58:14,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:58:14,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:58:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:14,472 INFO L87 Difference]: Start difference. First operand 4542 states and 8565 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:14,871 INFO L93 Difference]: Finished difference Result 9018 states and 17040 transitions. [2021-11-07 00:58:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 00:58:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:14,878 INFO L225 Difference]: With dead ends: 9018 [2021-11-07 00:58:14,878 INFO L226 Difference]: Without dead ends: 4517 [2021-11-07 00:58:14,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:58:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-07 00:58:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4517. [2021-11-07 00:58:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 1.8885195035460993) internal successors, (8521), 4516 states have internal predecessors, (8521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 8521 transitions. [2021-11-07 00:58:15,210 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 8521 transitions. Word has length 57 [2021-11-07 00:58:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:15,211 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 8521 transitions. [2021-11-07 00:58:15,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 8521 transitions. [2021-11-07 00:58:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 00:58:15,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:15,213 INFO L513 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] [2021-11-07 00:58:15,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:15,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:15,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1234623212, now seen corresponding path program 1 times [2021-11-07 00:58:15,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:15,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195685776] [2021-11-07 00:58:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:15,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:15,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:15,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:58:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:16,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:16,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:16,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195685776] [2021-11-07 00:58:16,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195685776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:16,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:16,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:58:16,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210558551] [2021-11-07 00:58:16,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:16,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:16,196 INFO L87 Difference]: Start difference. First operand 4517 states and 8521 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:16,446 INFO L93 Difference]: Finished difference Result 8993 states and 16996 transitions. [2021-11-07 00:58:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:16,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 58 [2021-11-07 00:58:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:16,452 INFO L225 Difference]: With dead ends: 8993 [2021-11-07 00:58:16,452 INFO L226 Difference]: Without dead ends: 4514 [2021-11-07 00:58:16,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-11-07 00:58:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4514. [2021-11-07 00:58:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4509 states have (on average 1.8880017742293191) internal successors, (8513), 4513 states have internal predecessors, (8513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 8513 transitions. [2021-11-07 00:58:16,789 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 8513 transitions. Word has length 58 [2021-11-07 00:58:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 8513 transitions. [2021-11-07 00:58:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 8513 transitions. [2021-11-07 00:58:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 00:58:16,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:16,791 INFO L513 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] [2021-11-07 00:58:16,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:17,005 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -244440867, now seen corresponding path program 1 times [2021-11-07 00:58:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:17,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432133882] [2021-11-07 00:58:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:17,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:17,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:58:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:58:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:17,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:17,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:17,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432133882] [2021-11-07 00:58:17,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432133882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:17,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:17,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:17,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196580690] [2021-11-07 00:58:17,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:17,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:17,797 INFO L87 Difference]: Start difference. First operand 4514 states and 8513 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:18,153 INFO L93 Difference]: Finished difference Result 8984 states and 16978 transitions. [2021-11-07 00:58:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 59 [2021-11-07 00:58:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:18,160 INFO L225 Difference]: With dead ends: 8984 [2021-11-07 00:58:18,160 INFO L226 Difference]: Without dead ends: 4512 [2021-11-07 00:58:18,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2021-11-07 00:58:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4512. [2021-11-07 00:58:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 4507 states have (on average 1.8875083203905036) internal successors, (8507), 4511 states have internal predecessors, (8507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 8507 transitions. [2021-11-07 00:58:18,486 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 8507 transitions. Word has length 59 [2021-11-07 00:58:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:18,488 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 8507 transitions. [2021-11-07 00:58:18,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 8507 transitions. [2021-11-07 00:58:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 00:58:18,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:18,490 INFO L513 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] [2021-11-07 00:58:18,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:18,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:18,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash -558837487, now seen corresponding path program 1 times [2021-11-07 00:58:18,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:18,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001855717] [2021-11-07 00:58:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:18,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:18,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:18,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:58:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:58:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:19,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:19,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:19,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001855717] [2021-11-07 00:58:19,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001855717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:19,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:19,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943834083] [2021-11-07 00:58:19,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:19,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:19,512 INFO L87 Difference]: Start difference. First operand 4512 states and 8507 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:19,866 INFO L93 Difference]: Finished difference Result 8977 states and 16963 transitions. [2021-11-07 00:58:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-07 00:58:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:19,873 INFO L225 Difference]: With dead ends: 8977 [2021-11-07 00:58:19,874 INFO L226 Difference]: Without dead ends: 4510 [2021-11-07 00:58:19,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-07 00:58:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-07 00:58:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4505 states have (on average 1.8870144284128745) internal successors, (8501), 4509 states have internal predecessors, (8501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 8501 transitions. [2021-11-07 00:58:20,106 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 8501 transitions. Word has length 60 [2021-11-07 00:58:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:20,106 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 8501 transitions. [2021-11-07 00:58:20,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 8501 transitions. [2021-11-07 00:58:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 00:58:20,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:20,108 INFO L513 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] [2021-11-07 00:58:20,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 00:58:20,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:20,334 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2018540690, now seen corresponding path program 1 times [2021-11-07 00:58:20,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:20,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514836819] [2021-11-07 00:58:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:20,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:20,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:20,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:20,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:58:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:21,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:21,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:21,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514836819] [2021-11-07 00:58:21,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514836819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:21,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:21,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 00:58:21,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943747002] [2021-11-07 00:58:21,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:21,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:21,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:21,467 INFO L87 Difference]: Start difference. First operand 4510 states and 8501 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:22,215 INFO L93 Difference]: Finished difference Result 12586 states and 23781 transitions. [2021-11-07 00:58:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:22,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 61 [2021-11-07 00:58:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:22,226 INFO L225 Difference]: With dead ends: 12586 [2021-11-07 00:58:22,226 INFO L226 Difference]: Without dead ends: 10299 [2021-11-07 00:58:22,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-11-07 00:58:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 6070. [2021-11-07 00:58:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 6065 states have (on average 1.889035449299258) internal successors, (11457), 6069 states have internal predecessors, (11457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 11457 transitions. [2021-11-07 00:58:22,511 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 11457 transitions. Word has length 61 [2021-11-07 00:58:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:22,512 INFO L470 AbstractCegarLoop]: Abstraction has 6070 states and 11457 transitions. [2021-11-07 00:58:22,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 11457 transitions. [2021-11-07 00:58:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 00:58:22,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:22,516 INFO L513 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] [2021-11-07 00:58:22,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:22,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:22,731 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash 582803611, now seen corresponding path program 1 times [2021-11-07 00:58:22,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:22,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164246558] [2021-11-07 00:58:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:22,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:22,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:22,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:22,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:58:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:23,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:23,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:23,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164246558] [2021-11-07 00:58:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164246558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:23,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:23,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 00:58:23,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018722973] [2021-11-07 00:58:23,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:23,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:23,726 INFO L87 Difference]: Start difference. First operand 6070 states and 11457 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:24,375 INFO L93 Difference]: Finished difference Result 11636 states and 21758 transitions. [2021-11-07 00:58:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 00:58:24,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 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 74 [2021-11-07 00:58:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:24,384 INFO L225 Difference]: With dead ends: 11636 [2021-11-07 00:58:24,384 INFO L226 Difference]: Without dead ends: 6721 [2021-11-07 00:58:24,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:58:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-07 00:58:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 4509. [2021-11-07 00:58:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 4504 states have (on average 1.8792184724689165) internal successors, (8464), 4508 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 8464 transitions. [2021-11-07 00:58:24,608 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 8464 transitions. Word has length 74 [2021-11-07 00:58:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:24,609 INFO L470 AbstractCegarLoop]: Abstraction has 4509 states and 8464 transitions. [2021-11-07 00:58:24,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 8464 transitions. [2021-11-07 00:58:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:58:24,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:24,612 INFO L513 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, 1] [2021-11-07 00:58:24,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:24,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:24,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1996387262, now seen corresponding path program 1 times [2021-11-07 00:58:24,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:24,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213669550] [2021-11-07 00:58:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:24,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:24,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:58:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:25,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:25,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:25,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213669550] [2021-11-07 00:58:25,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213669550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:25,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:25,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:25,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249171273] [2021-11-07 00:58:25,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:25,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:25,909 INFO L87 Difference]: Start difference. First operand 4509 states and 8464 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:28,091 INFO L93 Difference]: Finished difference Result 18072 states and 33925 transitions. [2021-11-07 00:58:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:58:28,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 00:58:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:28,110 INFO L225 Difference]: With dead ends: 18072 [2021-11-07 00:58:28,110 INFO L226 Difference]: Without dead ends: 13626 [2021-11-07 00:58:28,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13626 states. [2021-11-07 00:58:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13626 to 4517. [2021-11-07 00:58:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 1.877659574468085) internal successors, (8472), 4516 states have internal predecessors, (8472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 8472 transitions. [2021-11-07 00:58:28,445 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 8472 transitions. Word has length 75 [2021-11-07 00:58:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:28,445 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 8472 transitions. [2021-11-07 00:58:28,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 8472 transitions. [2021-11-07 00:58:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 00:58:28,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:28,448 INFO L513 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, 1, 1] [2021-11-07 00:58:28,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:28,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:28,663 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1669216304, now seen corresponding path program 1 times [2021-11-07 00:58:28,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:28,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868939312] [2021-11-07 00:58:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:28,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:28,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:28,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:58:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:29,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:29,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868939312] [2021-11-07 00:58:29,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868939312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:29,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:29,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 00:58:29,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561367160] [2021-11-07 00:58:29,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:29,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:29,600 INFO L87 Difference]: Start difference. First operand 4517 states and 8472 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:36,881 INFO L93 Difference]: Finished difference Result 12669 states and 23738 transitions. [2021-11-07 00:58:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:58:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 76 [2021-11-07 00:58:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:36,894 INFO L225 Difference]: With dead ends: 12669 [2021-11-07 00:58:36,894 INFO L226 Difference]: Without dead ends: 9480 [2021-11-07 00:58:36,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9480 states. [2021-11-07 00:58:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 8433. [2021-11-07 00:58:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8428 states have (on average 1.8815851922164215) internal successors, (15858), 8432 states have internal predecessors, (15858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 15858 transitions. [2021-11-07 00:58:37,356 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 15858 transitions. Word has length 76 [2021-11-07 00:58:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:37,357 INFO L470 AbstractCegarLoop]: Abstraction has 8433 states and 15858 transitions. [2021-11-07 00:58:37,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 15858 transitions. [2021-11-07 00:58:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 00:58:37,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:37,361 INFO L513 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, 1, 1, 1] [2021-11-07 00:58:37,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:37,573 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1988876260, now seen corresponding path program 1 times [2021-11-07 00:58:37,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:37,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371591080] [2021-11-07 00:58:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:37,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:37,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:37,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:58:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:38,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:38,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:38,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371591080] [2021-11-07 00:58:38,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371591080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:38,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:38,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:58:38,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122340335] [2021-11-07 00:58:38,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:38,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:38,605 INFO L87 Difference]: Start difference. First operand 8433 states and 15858 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:40,881 INFO L93 Difference]: Finished difference Result 16477 states and 30824 transitions. [2021-11-07 00:58:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 00:58:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:40,890 INFO L225 Difference]: With dead ends: 16477 [2021-11-07 00:58:40,890 INFO L226 Difference]: Without dead ends: 9364 [2021-11-07 00:58:40,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-11-07 00:58:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 8365. [2021-11-07 00:58:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8365 states, 8360 states have (on average 1.8700956937799043) internal successors, (15634), 8364 states have internal predecessors, (15634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8365 states to 8365 states and 15634 transitions. [2021-11-07 00:58:41,263 INFO L78 Accepts]: Start accepts. Automaton has 8365 states and 15634 transitions. Word has length 77 [2021-11-07 00:58:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:41,263 INFO L470 AbstractCegarLoop]: Abstraction has 8365 states and 15634 transitions. [2021-11-07 00:58:41,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8365 states and 15634 transitions. [2021-11-07 00:58:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 00:58:41,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:41,265 INFO L513 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, 1, 1, 1, 1] [2021-11-07 00:58:41,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:41,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:41,487 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash -688334952, now seen corresponding path program 1 times [2021-11-07 00:58:41,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:41,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093394432] [2021-11-07 00:58:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:41,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:41,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:41,489 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:41,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:58:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:42,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:42,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:42,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:42,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093394432] [2021-11-07 00:58:42,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093394432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:42,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:42,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:42,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883153779] [2021-11-07 00:58:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:42,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:42,584 INFO L87 Difference]: Start difference. First operand 8365 states and 15634 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:45,183 INFO L93 Difference]: Finished difference Result 60938 states and 114273 transitions. [2021-11-07 00:58:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:58:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 00:58:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:45,249 INFO L225 Difference]: With dead ends: 60938 [2021-11-07 00:58:45,249 INFO L226 Difference]: Without dead ends: 52632 [2021-11-07 00:58:45,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52632 states. [2021-11-07 00:58:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52632 to 15759. [2021-11-07 00:58:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15759 states, 15754 states have (on average 1.8717785959121493) internal successors, (29488), 15758 states have internal predecessors, (29488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15759 states to 15759 states and 29488 transitions. [2021-11-07 00:58:46,316 INFO L78 Accepts]: Start accepts. Automaton has 15759 states and 29488 transitions. Word has length 78 [2021-11-07 00:58:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:46,316 INFO L470 AbstractCegarLoop]: Abstraction has 15759 states and 29488 transitions. [2021-11-07 00:58:46,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 15759 states and 29488 transitions. [2021-11-07 00:58:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 00:58:46,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:46,318 INFO L513 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, 1, 1, 1, 1] [2021-11-07 00:58:46,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:46,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:46,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash -822348458, now seen corresponding path program 1 times [2021-11-07 00:58:46,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:46,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631434353] [2021-11-07 00:58:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:46,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:46,535 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:46,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:58:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:47,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:47,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:47,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:47,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:47,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631434353] [2021-11-07 00:58:47,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631434353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:47,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:47,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:58:47,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386415606] [2021-11-07 00:58:47,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:47,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:47,650 INFO L87 Difference]: Start difference. First operand 15759 states and 29488 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:50,074 INFO L93 Difference]: Finished difference Result 57236 states and 107363 transitions. [2021-11-07 00:58:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 00:58:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:50,129 INFO L225 Difference]: With dead ends: 57236 [2021-11-07 00:58:50,129 INFO L226 Difference]: Without dead ends: 45856 [2021-11-07 00:58:50,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45856 states. [2021-11-07 00:58:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45856 to 26582. [2021-11-07 00:58:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26582 states, 26577 states have (on average 1.8741016668547992) internal successors, (49808), 26581 states have internal predecessors, (49808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26582 states to 26582 states and 49808 transitions. [2021-11-07 00:58:51,801 INFO L78 Accepts]: Start accepts. Automaton has 26582 states and 49808 transitions. Word has length 78 [2021-11-07 00:58:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:51,801 INFO L470 AbstractCegarLoop]: Abstraction has 26582 states and 49808 transitions. [2021-11-07 00:58:51,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 26582 states and 49808 transitions. [2021-11-07 00:58:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 00:58:51,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:51,803 INFO L513 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, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:51,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 00:58:52,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:52,018 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:58:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash 988763232, now seen corresponding path program 1 times [2021-11-07 00:58:52,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:52,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987125677] [2021-11-07 00:58:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:52,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:52,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:52,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:52,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:58:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:52,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:53,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:53,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987125677] [2021-11-07 00:58:53,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987125677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:53,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:53,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 00:58:53,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413541431] [2021-11-07 00:58:53,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:58:53,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:58:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:53,210 INFO L87 Difference]: Start difference. First operand 26582 states and 49808 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:01,954 INFO L93 Difference]: Finished difference Result 167384 states and 314427 transitions. [2021-11-07 00:59:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:59:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 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 80 [2021-11-07 00:59:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:02,173 INFO L225 Difference]: With dead ends: 167384 [2021-11-07 00:59:02,173 INFO L226 Difference]: Without dead ends: 145181 [2021-11-07 00:59:02,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:59:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145181 states. [2021-11-07 00:59:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145181 to 46056. [2021-11-07 00:59:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46056 states, 46051 states have (on average 1.8761807561182167) internal successors, (86400), 46055 states have internal predecessors, (86400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46056 states to 46056 states and 86400 transitions. [2021-11-07 00:59:05,798 INFO L78 Accepts]: Start accepts. Automaton has 46056 states and 86400 transitions. Word has length 80 [2021-11-07 00:59:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:05,799 INFO L470 AbstractCegarLoop]: Abstraction has 46056 states and 86400 transitions. [2021-11-07 00:59:05,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 46056 states and 86400 transitions. [2021-11-07 00:59:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 00:59:05,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:05,802 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:05,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:06,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:06,004 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash -430971208, now seen corresponding path program 1 times [2021-11-07 00:59:06,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:06,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123771828] [2021-11-07 00:59:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:06,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:06,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:06,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:06,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 00:59:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:06,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:06,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:06,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:07,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:07,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123771828] [2021-11-07 00:59:07,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123771828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:07,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:07,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:07,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254054742] [2021-11-07 00:59:07,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:07,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:07,168 INFO L87 Difference]: Start difference. First operand 46056 states and 86400 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:10,037 INFO L93 Difference]: Finished difference Result 87865 states and 164842 transitions. [2021-11-07 00:59:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 87 [2021-11-07 00:59:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:10,100 INFO L225 Difference]: With dead ends: 87865 [2021-11-07 00:59:10,101 INFO L226 Difference]: Without dead ends: 46071 [2021-11-07 00:59:10,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46071 states. [2021-11-07 00:59:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46071 to 46056. [2021-11-07 00:59:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46056 states, 46051 states have (on average 1.870534841805824) internal successors, (86140), 46055 states have internal predecessors, (86140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46056 states to 46056 states and 86140 transitions. [2021-11-07 00:59:13,086 INFO L78 Accepts]: Start accepts. Automaton has 46056 states and 86140 transitions. Word has length 87 [2021-11-07 00:59:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:13,087 INFO L470 AbstractCegarLoop]: Abstraction has 46056 states and 86140 transitions. [2021-11-07 00:59:13,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 46056 states and 86140 transitions. [2021-11-07 00:59:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 00:59:13,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:13,089 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:13,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:13,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:13,305 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:59:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash -508682251, now seen corresponding path program 1 times [2021-11-07 00:59:13,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:13,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844693132] [2021-11-07 00:59:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:13,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:13,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:13,307 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:13,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d5f0618-a757-4693-ad2b-ccb79425e6ff/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 00:59:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:14,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:14,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:14,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844693132] [2021-11-07 00:59:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844693132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:14,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:14,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:14,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584771566] [2021-11-07 00:59:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:14,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:14,434 INFO L87 Difference]: Start difference. First operand 46056 states and 86140 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)