./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product34.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_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/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_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/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_70a53697-3c64-478a-a178-b3ba7f9d187d/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 39fe77adb61a1e466f06fcf9920e7f42d562f22740249d3a797ea504e0f3c31a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:35,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:35,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:35,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:35,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:35,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:35,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:35,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:35,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:35,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:35,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:36,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:36,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:36,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:36,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:36,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:36,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:36,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:36,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:36,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:36,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:36,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:36,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:36,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:36,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:36,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:36,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:36,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:36,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:36,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:36,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:36,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:36,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:36,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:36,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:36,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:36,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:36,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:36,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:36,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:36,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:36,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:36,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:36,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:36,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:36,133 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:36,133 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:36,134 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:36,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:36,134 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:36,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:36,143 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:36,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:36,144 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:36,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:36,145 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:36,145 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:36,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:36,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:36,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:36,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:36,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:36,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:36,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:36,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:36,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:36,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:36,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:36,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:36,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:36,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:36,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:36,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:36,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:36,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:36,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:36,154 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:36,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:36,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:36,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:36,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:36,155 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_70a53697-3c64-478a-a178-b3ba7f9d187d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39fe77adb61a1e466f06fcf9920e7f42d562f22740249d3a797ea504e0f3c31a [2021-11-07 01:03:36,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:36,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:36,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:36,560 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:36,561 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:36,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product34.cil.c [2021-11-07 01:03:36,666 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/91a099503/74db1d3363ff405196d34bd0a769a19c/FLAG8e35365f3 [2021-11-07 01:03:37,517 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:37,518 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/sv-benchmarks/c/product-lines/email_spec27_product34.cil.c [2021-11-07 01:03:37,564 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/91a099503/74db1d3363ff405196d34bd0a769a19c/FLAG8e35365f3 [2021-11-07 01:03:37,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/91a099503/74db1d3363ff405196d34bd0a769a19c [2021-11-07 01:03:37,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:37,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:37,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:37,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:37,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:37,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:37" (1/1) ... [2021-11-07 01:03:37,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67023192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:37, skipping insertion in model container [2021-11-07 01:03:37,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:37" (1/1) ... [2021-11-07 01:03:37,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:37,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:38,478 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_70a53697-3c64-478a-a178-b3ba7f9d187d/sv-benchmarks/c/product-lines/email_spec27_product34.cil.c[51595,51608] [2021-11-07 01:03:38,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:38,587 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 01:03:38,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c59adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:38, skipping insertion in model container [2021-11-07 01:03:38,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:38,589 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:03:38,594 INFO L168 Benchmark]: Toolchain (without parser) took 917.71 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 72.8 MB in the beginning and 117.7 MB in the end (delta: -44.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:38,596 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 107.0 MB. Free memory is still 59.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:03:38,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 914.18 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 72.5 MB in the beginning and 117.7 MB in the end (delta: -45.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:38,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 107.0 MB. Free memory is still 59.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 914.18 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 72.5 MB in the beginning and 117.7 MB in the end (delta: -45.2 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: 2450]: 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_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/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_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/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_70a53697-3c64-478a-a178-b3ba7f9d187d/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 39fe77adb61a1e466f06fcf9920e7f42d562f22740249d3a797ea504e0f3c31a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:41,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:41,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:41,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:41,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:41,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:41,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:41,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:41,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:41,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:41,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:41,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:41,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:41,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:41,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:41,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:41,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:41,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:41,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:41,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:41,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:41,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:41,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:41,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:41,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:41,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:41,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:41,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:41,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:41,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:41,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:41,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:41,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:41,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:41,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:41,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:41,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:41,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:41,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:41,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:41,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:41,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:03:41,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:41,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:41,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:41,693 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:41,694 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:41,694 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:41,694 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:41,695 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:41,695 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:41,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:41,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:41,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:41,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:41,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:41,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:41,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:41,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:41,700 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:03:41,700 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:03:41,700 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:41,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:41,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:41,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:41,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:41,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:03:41,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:41,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:41,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:41,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:41,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:41,704 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:03:41,704 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:41,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:41,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:41,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:41,706 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_70a53697-3c64-478a-a178-b3ba7f9d187d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39fe77adb61a1e466f06fcf9920e7f42d562f22740249d3a797ea504e0f3c31a [2021-11-07 01:03:42,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:42,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:42,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:42,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:42,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:42,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product34.cil.c [2021-11-07 01:03:42,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/3ff779026/3ffb4eb3533c4ce89bfe9509bdcf111c/FLAG9a364e16a [2021-11-07 01:03:43,212 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:43,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/sv-benchmarks/c/product-lines/email_spec27_product34.cil.c [2021-11-07 01:03:43,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/3ff779026/3ffb4eb3533c4ce89bfe9509bdcf111c/FLAG9a364e16a [2021-11-07 01:03:43,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/data/3ff779026/3ffb4eb3533c4ce89bfe9509bdcf111c [2021-11-07 01:03:43,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:43,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:43,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:43,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:43,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:43,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:43,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35641aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43, skipping insertion in model container [2021-11-07 01:03:43,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:43,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:43,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:44,392 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_70a53697-3c64-478a-a178-b3ba7f9d187d/sv-benchmarks/c/product-lines/email_spec27_product34.cil.c[51595,51608] [2021-11-07 01:03:44,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:44,544 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:03:44,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:44,695 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_70a53697-3c64-478a-a178-b3ba7f9d187d/sv-benchmarks/c/product-lines/email_spec27_product34.cil.c[51595,51608] [2021-11-07 01:03:44,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:44,764 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:44,876 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_70a53697-3c64-478a-a178-b3ba7f9d187d/sv-benchmarks/c/product-lines/email_spec27_product34.cil.c[51595,51608] [2021-11-07 01:03:44,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:44,978 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:44,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44 WrapperNode [2021-11-07 01:03:44,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:44,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:44,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:44,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:44,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:45,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:45,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:45,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:45,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:45,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:45,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:45,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:45,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (1/1) ... [2021-11-07 01:03:45,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:45,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:45,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:03:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:45,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:03:45,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:45,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:53,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:53,284 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2021-11-07 01:03:53,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:53 BoogieIcfgContainer [2021-11-07 01:03:53,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:53,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:53,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:53,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:53,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:43" (1/3) ... [2021-11-07 01:03:53,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4e1f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:53, skipping insertion in model container [2021-11-07 01:03:53,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:44" (2/3) ... [2021-11-07 01:03:53,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4e1f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:53, skipping insertion in model container [2021-11-07 01:03:53,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:53" (3/3) ... [2021-11-07 01:03:53,303 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product34.cil.c [2021-11-07 01:03:53,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:53,310 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:03:53,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:53,384 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 01:03:53,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:03:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 1320 states, 1313 states have (on average 1.7334348819497334) internal successors, (2276), 1319 states have internal predecessors, (2276), 0 states have call successors, (0), 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 01:03:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:03:53,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:53,499 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] [2021-11-07 01:03:53,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1075894190, now seen corresponding path program 1 times [2021-11-07 01:03:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:53,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975502676] [2021-11-07 01:03:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:53,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:53,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:53,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:53,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:03:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:03:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:54,493 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 01:03:54,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:54,704 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 01:03:54,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:54,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975502676] [2021-11-07 01:03:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975502676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:54,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:54,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:03:54,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924273673] [2021-11-07 01:03:54,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:03:54,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:03:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:03:54,745 INFO L87 Difference]: Start difference. First operand has 1320 states, 1313 states have (on average 1.7334348819497334) internal successors, (2276), 1319 states have internal predecessors, (2276), 0 states have call successors, (0), 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 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:54,895 INFO L93 Difference]: Finished difference Result 2355 states and 4029 transitions. [2021-11-07 01:03:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:03:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:03:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:54,991 INFO L225 Difference]: With dead ends: 2355 [2021-11-07 01:03:54,991 INFO L226 Difference]: Without dead ends: 1228 [2021-11-07 01:03:55,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 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 01:03:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-11-07 01:03:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-11-07 01:03:55,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1222 states have (on average 1.7356792144026187) internal successors, (2121), 1227 states have internal predecessors, (2121), 0 states have call successors, (0), 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 01:03:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2121 transitions. [2021-11-07 01:03:55,158 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2121 transitions. Word has length 65 [2021-11-07 01:03:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:55,159 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 2121 transitions. [2021-11-07 01:03:55,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2121 transitions. [2021-11-07 01:03:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:03:55,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:55,177 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] [2021-11-07 01:03:55,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:55,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2081651738, now seen corresponding path program 1 times [2021-11-07 01:03:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:55,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881927445] [2021-11-07 01:03:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:55,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:55,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:55,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:03:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:03:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:56,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:56,486 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 01:03:56,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:56,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881927445] [2021-11-07 01:03:56,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881927445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:56,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:56,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981722261] [2021-11-07 01:03:56,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:56,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:56,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:56,492 INFO L87 Difference]: Start difference. First operand 1228 states and 2121 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 01:03:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:56,783 INFO L93 Difference]: Finished difference Result 3654 states and 6315 transitions. [2021-11-07 01:03:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 66 [2021-11-07 01:03:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:56,812 INFO L225 Difference]: With dead ends: 3654 [2021-11-07 01:03:56,813 INFO L226 Difference]: Without dead ends: 2441 [2021-11-07 01:03:56,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 01:03:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-11-07 01:03:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1227. [2021-11-07 01:03:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1221 states have (on average 1.733005733005733) internal successors, (2116), 1226 states have internal predecessors, (2116), 0 states have call successors, (0), 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 01:03:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 2116 transitions. [2021-11-07 01:03:56,912 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 2116 transitions. Word has length 66 [2021-11-07 01:03:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:56,914 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 2116 transitions. [2021-11-07 01:03:56,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 01:03:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 2116 transitions. [2021-11-07 01:03:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:03:56,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:56,925 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] [2021-11-07 01:03:56,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:57,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:57,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1424183668, now seen corresponding path program 1 times [2021-11-07 01:03:57,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:57,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896473419] [2021-11-07 01:03:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:57,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:57,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:57,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:57,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:03:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:03:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:58,036 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 01:03:58,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:58,291 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 01:03:58,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:58,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896473419] [2021-11-07 01:03:58,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896473419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:58,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:58,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:58,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915968532] [2021-11-07 01:03:58,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:58,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:58,295 INFO L87 Difference]: Start difference. First operand 1227 states and 2116 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:03:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:58,804 INFO L93 Difference]: Finished difference Result 4825 states and 8326 transitions. [2021-11-07 01:03:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:58,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:03:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:58,832 INFO L225 Difference]: With dead ends: 4825 [2021-11-07 01:03:58,832 INFO L226 Difference]: Without dead ends: 3616 [2021-11-07 01:03:58,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2021-11-07 01:03:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 1226. [2021-11-07 01:03:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1220 states have (on average 1.7311475409836066) internal successors, (2112), 1225 states have internal predecessors, (2112), 0 states have call successors, (0), 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 01:03:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2112 transitions. [2021-11-07 01:03:58,955 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2112 transitions. Word has length 68 [2021-11-07 01:03:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:58,955 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2112 transitions. [2021-11-07 01:03:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 01:03:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2112 transitions. [2021-11-07 01:03:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:03:58,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:58,958 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] [2021-11-07 01:03:58,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:59,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:59,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1589171777, now seen corresponding path program 1 times [2021-11-07 01:03:59,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:59,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083285234] [2021-11-07 01:03:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:59,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:59,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:59,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:59,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:03:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:03:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:00,071 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 01:04:00,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:00,315 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 01:04:00,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:00,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083285234] [2021-11-07 01:04:00,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083285234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:00,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:00,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:00,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927535668] [2021-11-07 01:04:00,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:00,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:00,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:00,321 INFO L87 Difference]: Start difference. First operand 1226 states and 2112 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:00,476 INFO L93 Difference]: Finished difference Result 2449 states and 4221 transitions. [2021-11-07 01:04:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:04:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:00,488 INFO L225 Difference]: With dead ends: 2449 [2021-11-07 01:04:00,489 INFO L226 Difference]: Without dead ends: 1231 [2021-11-07 01:04:00,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:04:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-11-07 01:04:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1226. [2021-11-07 01:04:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1220 states have (on average 1.728688524590164) internal successors, (2109), 1225 states have internal predecessors, (2109), 0 states have call successors, (0), 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 01:04:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2109 transitions. [2021-11-07 01:04:00,590 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2109 transitions. Word has length 69 [2021-11-07 01:04:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:00,591 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2109 transitions. [2021-11-07 01:04:00,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2109 transitions. [2021-11-07 01:04:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:04:00,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:00,594 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] [2021-11-07 01:04:00,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:00,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:00,810 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1695941516, now seen corresponding path program 1 times [2021-11-07 01:04:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:00,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495703253] [2021-11-07 01:04:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:00,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:00,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:00,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:00,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:04:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:01,680 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 01:04:01,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:01,932 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 01:04:01,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:01,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495703253] [2021-11-07 01:04:01,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495703253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:01,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:01,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:01,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8293463] [2021-11-07 01:04:01,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:01,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:01,944 INFO L87 Difference]: Start difference. First operand 1226 states and 2109 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 01:04:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:02,562 INFO L93 Difference]: Finished difference Result 4812 states and 8302 transitions. [2021-11-07 01:04:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 70 [2021-11-07 01:04:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:02,591 INFO L225 Difference]: With dead ends: 4812 [2021-11-07 01:04:02,591 INFO L226 Difference]: Without dead ends: 3612 [2021-11-07 01:04:02,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:04:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2021-11-07 01:04:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 1226. [2021-11-07 01:04:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1220 states have (on average 1.7262295081967214) internal successors, (2106), 1225 states have internal predecessors, (2106), 0 states have call successors, (0), 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 01:04:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2106 transitions. [2021-11-07 01:04:02,761 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2106 transitions. Word has length 70 [2021-11-07 01:04:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2106 transitions. [2021-11-07 01:04:02,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 01:04:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2106 transitions. [2021-11-07 01:04:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:04:02,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:02,764 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] [2021-11-07 01:04:02,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:02,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:02,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1554667535, now seen corresponding path program 1 times [2021-11-07 01:04:02,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:02,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809882167] [2021-11-07 01:04:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:02,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:02,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:02,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:04:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:03,911 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 01:04:03,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:04,137 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 01:04:04,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:04,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809882167] [2021-11-07 01:04:04,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809882167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:04,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:04,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:04,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429217463] [2021-11-07 01:04:04,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:04,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:04,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:04,141 INFO L87 Difference]: Start difference. First operand 1226 states and 2106 transitions. Second operand has 4 states, 4 states have (on average 18.75) 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 01:04:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:04,436 INFO L93 Difference]: Finished difference Result 3369 states and 5783 transitions. [2021-11-07 01:04:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:04,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) 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 72 [2021-11-07 01:04:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:04,456 INFO L225 Difference]: With dead ends: 3369 [2021-11-07 01:04:04,456 INFO L226 Difference]: Without dead ends: 2426 [2021-11-07 01:04:04,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 01:04:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-11-07 01:04:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1483. [2021-11-07 01:04:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1477 states have (on average 1.7461069735951253) internal successors, (2579), 1482 states have internal predecessors, (2579), 0 states have call successors, (0), 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 01:04:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 2579 transitions. [2021-11-07 01:04:04,657 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 2579 transitions. Word has length 72 [2021-11-07 01:04:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:04,657 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 2579 transitions. [2021-11-07 01:04:04,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) 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 01:04:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 2579 transitions. [2021-11-07 01:04:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:04:04,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:04,668 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] [2021-11-07 01:04:04,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:04,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:04,895 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1703628288, now seen corresponding path program 1 times [2021-11-07 01:04:04,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:04,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072739854] [2021-11-07 01:04:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:04,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:04,899 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:04,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:04:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:05,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:05,798 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 01:04:05,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:06,051 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 01:04:06,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:06,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072739854] [2021-11-07 01:04:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072739854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:06,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:06,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:06,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124811724] [2021-11-07 01:04:06,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:06,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:06,054 INFO L87 Difference]: Start difference. First operand 1483 states and 2579 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 01:04:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:06,323 INFO L93 Difference]: Finished difference Result 4030 states and 7003 transitions. [2021-11-07 01:04:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-07 01:04:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:06,346 INFO L225 Difference]: With dead ends: 4030 [2021-11-07 01:04:06,346 INFO L226 Difference]: Without dead ends: 2631 [2021-11-07 01:04:06,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-11-07 01:04:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1688. [2021-11-07 01:04:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1682 states have (on average 1.7568370986920332) internal successors, (2955), 1687 states have internal predecessors, (2955), 0 states have call successors, (0), 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 01:04:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2955 transitions. [2021-11-07 01:04:06,529 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2955 transitions. Word has length 84 [2021-11-07 01:04:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:06,531 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 2955 transitions. [2021-11-07 01:04:06,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 01:04:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2955 transitions. [2021-11-07 01:04:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:04:06,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:06,535 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] [2021-11-07 01:04:06,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:06,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:06,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:06,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -256662655, now seen corresponding path program 1 times [2021-11-07 01:04:06,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:06,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672343900] [2021-11-07 01:04:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:06,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:06,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:06,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:04:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:07,844 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 01:04:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:08,104 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 01:04:08,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:08,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672343900] [2021-11-07 01:04:08,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672343900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:08,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:08,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095880596] [2021-11-07 01:04:08,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:08,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:08,113 INFO L87 Difference]: Start difference. First operand 1688 states and 2955 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:08,383 INFO L93 Difference]: Finished difference Result 4689 states and 8217 transitions. [2021-11-07 01:04:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-07 01:04:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:08,407 INFO L225 Difference]: With dead ends: 4689 [2021-11-07 01:04:08,408 INFO L226 Difference]: Without dead ends: 3089 [2021-11-07 01:04:08,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-11-07 01:04:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2146. [2021-11-07 01:04:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2140 states have (on average 1.7742990654205608) internal successors, (3797), 2145 states have internal predecessors, (3797), 0 states have call successors, (0), 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 01:04:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3797 transitions. [2021-11-07 01:04:08,643 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3797 transitions. Word has length 85 [2021-11-07 01:04:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:08,643 INFO L470 AbstractCegarLoop]: Abstraction has 2146 states and 3797 transitions. [2021-11-07 01:04:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3797 transitions. [2021-11-07 01:04:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:04:08,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:08,649 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:08,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:08,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:08,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1959906961, now seen corresponding path program 1 times [2021-11-07 01:04:08,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:08,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454287585] [2021-11-07 01:04:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:08,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:08,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:08,870 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:08,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:04:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:09,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:09,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:09,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:09,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454287585] [2021-11-07 01:04:09,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454287585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:09,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:09,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:09,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164836050] [2021-11-07 01:04:09,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:09,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:09,985 INFO L87 Difference]: Start difference. First operand 2146 states and 3797 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:04:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:10,326 INFO L93 Difference]: Finished difference Result 4946 states and 8687 transitions. [2021-11-07 01:04:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 86 [2021-11-07 01:04:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:10,361 INFO L225 Difference]: With dead ends: 4946 [2021-11-07 01:04:10,362 INFO L226 Difference]: Without dead ends: 3089 [2021-11-07 01:04:10,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 168 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 01:04:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-11-07 01:04:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2146. [2021-11-07 01:04:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2140 states have (on average 1.7733644859813085) internal successors, (3795), 2145 states have internal predecessors, (3795), 0 states have call successors, (0), 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 01:04:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3795 transitions. [2021-11-07 01:04:10,558 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3795 transitions. Word has length 86 [2021-11-07 01:04:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:10,559 INFO L470 AbstractCegarLoop]: Abstraction has 2146 states and 3795 transitions. [2021-11-07 01:04:10,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:04:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3795 transitions. [2021-11-07 01:04:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:04:10,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:10,564 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] [2021-11-07 01:04:10,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:10,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:10,778 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1403890322, now seen corresponding path program 1 times [2021-11-07 01:04:10,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:10,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36388878] [2021-11-07 01:04:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:10,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:10,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:10,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:10,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:04:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:11,908 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 01:04:11,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:12,140 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 01:04:12,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:12,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36388878] [2021-11-07 01:04:12,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36388878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:12,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:12,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:12,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996620699] [2021-11-07 01:04:12,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:12,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:12,143 INFO L87 Difference]: Start difference. First operand 2146 states and 3795 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:04:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:12,520 INFO L93 Difference]: Finished difference Result 6035 states and 10692 transitions. [2021-11-07 01:04:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:12,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 01:04:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:12,543 INFO L225 Difference]: With dead ends: 6035 [2021-11-07 01:04:12,544 INFO L226 Difference]: Without dead ends: 3985 [2021-11-07 01:04:12,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2021-11-07 01:04:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3042. [2021-11-07 01:04:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3036 states have (on average 1.7924901185770752) internal successors, (5442), 3041 states have internal predecessors, (5442), 0 states have call successors, (0), 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 01:04:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 5442 transitions. [2021-11-07 01:04:12,842 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 5442 transitions. Word has length 86 [2021-11-07 01:04:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:12,842 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 5442 transitions. [2021-11-07 01:04:12,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:04:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 5442 transitions. [2021-11-07 01:04:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:04:12,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:12,854 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 01:04:12,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:13,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:13,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash 152310271, now seen corresponding path program 1 times [2021-11-07 01:04:13,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:13,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154778476] [2021-11-07 01:04:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:13,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:13,079 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:13,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:04:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:14,171 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 01:04:14,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:14,419 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 01:04:14,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:14,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154778476] [2021-11-07 01:04:14,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154778476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:14,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:14,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:14,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309444403] [2021-11-07 01:04:14,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:14,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:14,422 INFO L87 Difference]: Start difference. First operand 3042 states and 5442 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 01:04:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:14,863 INFO L93 Difference]: Finished difference Result 8459 states and 15152 transitions. [2021-11-07 01:04:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 01:04:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:14,904 INFO L225 Difference]: With dead ends: 8459 [2021-11-07 01:04:14,904 INFO L226 Difference]: Without dead ends: 5547 [2021-11-07 01:04:14,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2021-11-07 01:04:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 4604. [2021-11-07 01:04:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4598 states have (on average 1.807525010874293) internal successors, (8311), 4603 states have internal predecessors, (8311), 0 states have call successors, (0), 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 01:04:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 8311 transitions. [2021-11-07 01:04:15,322 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 8311 transitions. Word has length 87 [2021-11-07 01:04:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:15,323 INFO L470 AbstractCegarLoop]: Abstraction has 4604 states and 8311 transitions. [2021-11-07 01:04:15,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 01:04:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 8311 transitions. [2021-11-07 01:04:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:04:15,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:15,336 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, 1] [2021-11-07 01:04:15,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:15,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:15,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash -198103391, now seen corresponding path program 1 times [2021-11-07 01:04:15,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:15,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465522418] [2021-11-07 01:04:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:15,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:15,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:15,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:15,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:04:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:16,573 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 01:04:16,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:16,790 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 01:04:16,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:16,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465522418] [2021-11-07 01:04:16,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465522418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:16,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:16,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:16,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854339386] [2021-11-07 01:04:16,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:16,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:16,793 INFO L87 Difference]: Start difference. First operand 4604 states and 8311 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:04:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:17,339 INFO L93 Difference]: Finished difference Result 12861 states and 23242 transitions. [2021-11-07 01:04:17,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:17,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-07 01:04:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:17,370 INFO L225 Difference]: With dead ends: 12861 [2021-11-07 01:04:17,370 INFO L226 Difference]: Without dead ends: 8421 [2021-11-07 01:04:17,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8421 states. [2021-11-07 01:04:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8421 to 7478. [2021-11-07 01:04:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7478 states, 7472 states have (on average 1.8179871520342612) internal successors, (13584), 7477 states have internal predecessors, (13584), 0 states have call successors, (0), 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 01:04:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 13584 transitions. [2021-11-07 01:04:17,985 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 13584 transitions. Word has length 88 [2021-11-07 01:04:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:17,985 INFO L470 AbstractCegarLoop]: Abstraction has 7478 states and 13584 transitions. [2021-11-07 01:04:17,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:04:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 13584 transitions. [2021-11-07 01:04:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:04:18,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:18,001 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:18,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:18,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:18,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 272633277, now seen corresponding path program 1 times [2021-11-07 01:04:18,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:18,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123426718] [2021-11-07 01:04:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:18,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:18,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:18,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:04:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:04:19,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:04:19,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:19,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123426718] [2021-11-07 01:04:19,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123426718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:19,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532321353] [2021-11-07 01:04:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:19,759 INFO L87 Difference]: Start difference. First operand 7478 states and 13584 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:04:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:23,334 INFO L93 Difference]: Finished difference Result 28423 states and 51671 transitions. [2021-11-07 01:04:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:04:23,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 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 89 [2021-11-07 01:04:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:23,403 INFO L225 Difference]: With dead ends: 28423 [2021-11-07 01:04:23,403 INFO L226 Difference]: Without dead ends: 21232 [2021-11-07 01:04:23,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:04:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2021-11-07 01:04:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 7428. [2021-11-07 01:04:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 7422 states have (on average 1.8032875235785502) internal successors, (13384), 7427 states have internal predecessors, (13384), 0 states have call successors, (0), 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 01:04:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 13384 transitions. [2021-11-07 01:04:24,193 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 13384 transitions. Word has length 89 [2021-11-07 01:04:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:24,193 INFO L470 AbstractCegarLoop]: Abstraction has 7428 states and 13384 transitions. [2021-11-07 01:04:24,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:04:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 13384 transitions. [2021-11-07 01:04:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:04:24,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:24,208 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, 1, 1] [2021-11-07 01:04:24,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:24,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:24,422 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:24,423 INFO L85 PathProgramCache]: Analyzing trace with hash 791608302, now seen corresponding path program 1 times [2021-11-07 01:04:24,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:24,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485677787] [2021-11-07 01:04:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:24,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:24,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:24,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:24,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:04:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:25,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:25,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:25,833 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 01:04:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:26,134 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 01:04:26,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:26,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485677787] [2021-11-07 01:04:26,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485677787] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:26,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:26,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:26,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980531400] [2021-11-07 01:04:26,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:26,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:26,136 INFO L87 Difference]: Start difference. First operand 7428 states and 13384 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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) [2021-11-07 01:04:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:26,723 INFO L93 Difference]: Finished difference Result 21662 states and 39084 transitions. [2021-11-07 01:04:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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) Word has length 89 [2021-11-07 01:04:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:26,769 INFO L225 Difference]: With dead ends: 21662 [2021-11-07 01:04:26,769 INFO L226 Difference]: Without dead ends: 14405 [2021-11-07 01:04:26,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2021-11-07 01:04:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 13462. [2021-11-07 01:04:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13462 states, 13456 states have (on average 1.809230083234245) internal successors, (24345), 13461 states have internal predecessors, (24345), 0 states have call successors, (0), 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 01:04:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13462 states to 13462 states and 24345 transitions. [2021-11-07 01:04:27,990 INFO L78 Accepts]: Start accepts. Automaton has 13462 states and 24345 transitions. Word has length 89 [2021-11-07 01:04:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:27,991 INFO L470 AbstractCegarLoop]: Abstraction has 13462 states and 24345 transitions. [2021-11-07 01:04:27,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 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) [2021-11-07 01:04:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 13462 states and 24345 transitions. [2021-11-07 01:04:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:04:28,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:28,011 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:28,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:28,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:28,226 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1014238242, now seen corresponding path program 1 times [2021-11-07 01:04:28,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:28,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161783283] [2021-11-07 01:04:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:28,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:28,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:28,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:04:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:29,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:29,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:29,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161783283] [2021-11-07 01:04:29,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161783283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:29,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1509131651] [2021-11-07 01:04:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:29,827 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:29,834 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:29,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:04:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:04:31,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:31,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:31,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1509131651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:31,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:31,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:04:31,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104218644] [2021-11-07 01:04:31,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:04:31,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:04:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:04:31,798 INFO L87 Difference]: Start difference. First operand 13462 states and 24345 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:41,660 INFO L93 Difference]: Finished difference Result 93846 states and 168661 transitions. [2021-11-07 01:04:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:04:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:04:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:41,878 INFO L225 Difference]: With dead ends: 93846 [2021-11-07 01:04:41,878 INFO L226 Difference]: Without dead ends: 92921 [2021-11-07 01:04:41,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:04:42,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92921 states. [2021-11-07 01:04:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92921 to 26490. [2021-11-07 01:04:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26490 states, 26484 states have (on average 1.8107159039420027) internal successors, (47955), 26489 states have internal predecessors, (47955), 0 states have call successors, (0), 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 01:04:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26490 states to 26490 states and 47955 transitions. [2021-11-07 01:04:45,197 INFO L78 Accepts]: Start accepts. Automaton has 26490 states and 47955 transitions. Word has length 90 [2021-11-07 01:04:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:45,198 INFO L470 AbstractCegarLoop]: Abstraction has 26490 states and 47955 transitions. [2021-11-07 01:04:45,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26490 states and 47955 transitions. [2021-11-07 01:04:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:04:45,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:45,240 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:45,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:45,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:04:45,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:45,654 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1248847250, now seen corresponding path program 1 times [2021-11-07 01:04:45,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:45,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101490523] [2021-11-07 01:04:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:45,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:45,657 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:45,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:04:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:46,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:47,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101490523] [2021-11-07 01:04:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101490523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382229386] [2021-11-07 01:04:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:47,286 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:47,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:47,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:04:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:04:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:48,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:49,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382229386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:49,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:49,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:04:49,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869800451] [2021-11-07 01:04:49,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:04:49,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:04:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:49,261 INFO L87 Difference]: Start difference. First operand 26490 states and 47955 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:53,178 INFO L93 Difference]: Finished difference Result 29149 states and 52452 transitions. [2021-11-07 01:04:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:04:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 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 91 [2021-11-07 01:04:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:53,227 INFO L225 Difference]: With dead ends: 29149 [2021-11-07 01:04:53,227 INFO L226 Difference]: Without dead ends: 27705 [2021-11-07 01:04:53,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:04:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27705 states. [2021-11-07 01:04:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27705 to 26484. [2021-11-07 01:04:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26484 states, 26478 states have (on average 1.8106352443538032) internal successors, (47942), 26483 states have internal predecessors, (47942), 0 states have call successors, (0), 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 01:04:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26484 states to 26484 states and 47942 transitions. [2021-11-07 01:04:55,107 INFO L78 Accepts]: Start accepts. Automaton has 26484 states and 47942 transitions. Word has length 91 [2021-11-07 01:04:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:55,107 INFO L470 AbstractCegarLoop]: Abstraction has 26484 states and 47942 transitions. [2021-11-07 01:04:55,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 26484 states and 47942 transitions. [2021-11-07 01:04:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:04:55,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:55,147 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:55,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:55,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:04:55,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:55,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1379454449, now seen corresponding path program 1 times [2021-11-07 01:04:55,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:55,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422524277] [2021-11-07 01:04:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:55,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:55,557 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:04:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:56,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:57,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:57,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422524277] [2021-11-07 01:04:57,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422524277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:57,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:57,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:04:57,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123602629] [2021-11-07 01:04:57,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:57,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:57,162 INFO L87 Difference]: Start difference. First operand 26484 states and 47942 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:04:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:59,213 INFO L93 Difference]: Finished difference Result 52344 states and 94950 transitions. [2021-11-07 01:04:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 91 [2021-11-07 01:04:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:59,254 INFO L225 Difference]: With dead ends: 52344 [2021-11-07 01:04:59,254 INFO L226 Difference]: Without dead ends: 26150 [2021-11-07 01:04:59,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 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 01:04:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26150 states. [2021-11-07 01:05:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26150 to 13460. [2021-11-07 01:05:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13460 states, 13454 states have (on average 1.8088300877062584) internal successors, (24336), 13459 states have internal predecessors, (24336), 0 states have call successors, (0), 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 01:05:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13460 states to 13460 states and 24336 transitions. [2021-11-07 01:05:00,264 INFO L78 Accepts]: Start accepts. Automaton has 13460 states and 24336 transitions. Word has length 91 [2021-11-07 01:05:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:00,264 INFO L470 AbstractCegarLoop]: Abstraction has 13460 states and 24336 transitions. [2021-11-07 01:05:00,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 01:05:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 13460 states and 24336 transitions. [2021-11-07 01:05:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:05:00,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:00,278 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:00,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:00,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,494 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1039890052, now seen corresponding path program 1 times [2021-11-07 01:05:00,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:00,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066903271] [2021-11-07 01:05:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:00,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:00,497 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:05:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:01,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:02,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:02,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066903271] [2021-11-07 01:05:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066903271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:02,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604975313] [2021-11-07 01:05:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:02,263 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:02,264 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:02,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:05:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:05:04,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:04,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604975313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:05,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:05,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:05:05,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056247654] [2021-11-07 01:05:05,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:05:05,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:05:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:05:05,576 INFO L87 Difference]: Start difference. First operand 13460 states and 24336 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 15 states have internal predecessors, (145), 0 states have call successors, (0), 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 01:05:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:35,399 INFO L93 Difference]: Finished difference Result 38839 states and 68366 transitions. [2021-11-07 01:05:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:05:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 15 states have internal predecessors, (145), 0 states have call successors, (0), 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 93 [2021-11-07 01:05:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:35,452 INFO L225 Difference]: With dead ends: 38839 [2021-11-07 01:05:35,452 INFO L226 Difference]: Without dead ends: 37962 [2021-11-07 01:05:35,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:05:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37962 states. [2021-11-07 01:05:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37962 to 27167. [2021-11-07 01:05:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27167 states, 27161 states have (on average 1.807739037590663) internal successors, (49100), 27166 states have internal predecessors, (49100), 0 states have call successors, (0), 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 01:05:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27167 states to 27167 states and 49100 transitions. [2021-11-07 01:05:37,585 INFO L78 Accepts]: Start accepts. Automaton has 27167 states and 49100 transitions. Word has length 93 [2021-11-07 01:05:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:37,585 INFO L470 AbstractCegarLoop]: Abstraction has 27167 states and 49100 transitions. [2021-11-07 01:05:37,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 15 states have internal predecessors, (145), 0 states have call successors, (0), 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 01:05:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27167 states and 49100 transitions. [2021-11-07 01:05:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:05:37,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:37,612 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:37,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:05:37,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:38,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:38,044 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash 803807105, now seen corresponding path program 1 times [2021-11-07 01:05:38,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:38,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626029916] [2021-11-07 01:05:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:38,046 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:05:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:39,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:39,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:39,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:39,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626029916] [2021-11-07 01:05:39,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626029916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [751931254] [2021-11-07 01:05:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:39,992 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:39,993 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:39,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:05:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:05:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:42,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:42,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [751931254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:42,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:42,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:05:42,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571792773] [2021-11-07 01:05:42,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:05:42,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:05:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:05:42,500 INFO L87 Difference]: Start difference. First operand 27167 states and 49100 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:05:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:47,403 INFO L93 Difference]: Finished difference Result 30610 states and 54832 transitions. [2021-11-07 01:05:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:05:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 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 94 [2021-11-07 01:05:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:47,445 INFO L225 Difference]: With dead ends: 30610 [2021-11-07 01:05:47,446 INFO L226 Difference]: Without dead ends: 28430 [2021-11-07 01:05:47,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:05:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28430 states. [2021-11-07 01:05:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28430 to 27113. [2021-11-07 01:05:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27113 states, 27107 states have (on average 1.8069133434168296) internal successors, (48980), 27112 states have internal predecessors, (48980), 0 states have call successors, (0), 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 01:05:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27113 states to 27113 states and 48980 transitions. [2021-11-07 01:05:49,405 INFO L78 Accepts]: Start accepts. Automaton has 27113 states and 48980 transitions. Word has length 94 [2021-11-07 01:05:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:49,405 INFO L470 AbstractCegarLoop]: Abstraction has 27113 states and 48980 transitions. [2021-11-07 01:05:49,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 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 01:05:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 27113 states and 48980 transitions. [2021-11-07 01:05:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:05:49,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:49,429 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:49,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:49,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:05:49,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:49,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:49,838 INFO L85 PathProgramCache]: Analyzing trace with hash -357162919, now seen corresponding path program 1 times [2021-11-07 01:05:49,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:49,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411810748] [2021-11-07 01:05:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:49,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:49,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:49,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:49,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:05:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:51,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:51,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:51,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:51,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411810748] [2021-11-07 01:05:51,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411810748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:51,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2095653547] [2021-11-07 01:05:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:51,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:51,832 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:05:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:05:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:54,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:55,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2095653547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:55,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:55,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:05:55,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649591523] [2021-11-07 01:05:55,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:05:55,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:05:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:05:55,039 INFO L87 Difference]: Start difference. First operand 27113 states and 48980 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:21,761 INFO L93 Difference]: Finished difference Result 74286 states and 131073 transitions. [2021-11-07 01:06:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:06:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 01:06:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:21,892 INFO L225 Difference]: With dead ends: 74286 [2021-11-07 01:06:21,892 INFO L226 Difference]: Without dead ends: 72452 [2021-11-07 01:06:21,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:06:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72452 states. [2021-11-07 01:06:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72452 to 54381. [2021-11-07 01:06:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54381 states, 54375 states have (on average 1.8062528735632184) internal successors, (98215), 54380 states have internal predecessors, (98215), 0 states have call successors, (0), 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 01:06:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54381 states to 54381 states and 98215 transitions. [2021-11-07 01:06:26,220 INFO L78 Accepts]: Start accepts. Automaton has 54381 states and 98215 transitions. Word has length 94 [2021-11-07 01:06:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:26,221 INFO L470 AbstractCegarLoop]: Abstraction has 54381 states and 98215 transitions. [2021-11-07 01:06:26,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 54381 states and 98215 transitions. [2021-11-07 01:06:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:06:26,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:26,286 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:26,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:26,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:26,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:26,695 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:06:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash -334530665, now seen corresponding path program 1 times [2021-11-07 01:06:26,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:26,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127944910] [2021-11-07 01:06:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:26,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:26,697 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:26,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:06:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:28,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:28,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:28,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:28,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:28,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127944910] [2021-11-07 01:06:28,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127944910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:28,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599463473] [2021-11-07 01:06:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:28,799 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:28,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:28,800 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:28,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70a53697-3c64-478a-a178-b3ba7f9d187d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:06:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:06:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:06:30,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:06:31,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599463473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:31,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:06:31,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:06:31,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325015418] [2021-11-07 01:06:31,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:06:31,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:06:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:06:31,626 INFO L87 Difference]: Start difference. First operand 54381 states and 98215 transitions. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 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 01:06:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:54,039 INFO L93 Difference]: Finished difference Result 107957 states and 187878 transitions. [2021-11-07 01:06:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:06:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 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 94 [2021-11-07 01:06:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:54,382 INFO L225 Difference]: With dead ends: 107957 [2021-11-07 01:06:54,382 INFO L226 Difference]: Without dead ends: 103601 [2021-11-07 01:06:54,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=862, Invalid=2798, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 01:06:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103601 states. [2021-11-07 01:07:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103601 to 58657. [2021-11-07 01:07:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58657 states, 58651 states have (on average 1.795587458014356) internal successors, (105313), 58656 states have internal predecessors, (105313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)