./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product19.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_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/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_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/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_77843842-0b28-4dbe-9e00-ad1662f8459d/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 0eb0a93133a0d165b4e13ef7269be4b8c3f0f81976a167102da919b09b6c6616 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:20,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:20,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:20,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:20,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:20,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:20,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:20,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:20,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:20,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:20,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:20,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:20,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:20,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:20,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:20,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:20,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:20,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:20,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:20,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:20,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:20,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:20,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:20,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:20,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:20,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:20,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:20,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:20,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:20,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:20,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:20,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:20,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:20,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:20,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:20,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:20,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:20,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:20,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:20,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:20,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:20,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:44:20,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:20,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:20,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:20,926 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:20,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:20,926 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:20,927 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:20,927 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:20,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:20,927 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:20,928 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:20,928 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:20,928 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:20,929 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:20,929 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:20,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:20,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:20,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:20,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:20,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:20,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:20,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:20,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:20,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:20,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:20,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:20,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:20,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:20,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:20,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:20,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:20,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:20,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:20,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:20,935 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:20,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:20,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:20,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:20,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:20,936 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_77843842-0b28-4dbe-9e00-ad1662f8459d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb0a93133a0d165b4e13ef7269be4b8c3f0f81976a167102da919b09b6c6616 [2021-11-07 01:44:21,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:21,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:21,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:21,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:21,216 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:21,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product19.cil.c [2021-11-07 01:44:21,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/34a39bc01/dd27cfb2249e4b66802ddf95dcd13d67/FLAGd2dd794d5 [2021-11-07 01:44:21,859 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:21,860 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/sv-benchmarks/c/product-lines/email_spec3_product19.cil.c [2021-11-07 01:44:21,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/34a39bc01/dd27cfb2249e4b66802ddf95dcd13d67/FLAGd2dd794d5 [2021-11-07 01:44:22,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/34a39bc01/dd27cfb2249e4b66802ddf95dcd13d67 [2021-11-07 01:44:22,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:22,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:22,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:22,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:22,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:22,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:22" (1/1) ... [2021-11-07 01:44:22,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559095ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:22, skipping insertion in model container [2021-11-07 01:44:22,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:22" (1/1) ... [2021-11-07 01:44:22,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:22,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:22,583 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_77843842-0b28-4dbe-9e00-ad1662f8459d/sv-benchmarks/c/product-lines/email_spec3_product19.cil.c[8336,8349] [2021-11-07 01:44:22,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:22,885 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 01:44:22,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e55770b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:22, skipping insertion in model container [2021-11-07 01:44:22,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:22,886 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:44:22,888 INFO L168 Benchmark]: Toolchain (without parser) took 774.08 ms. Allocated memory is still 102.8 MB. Free memory was 58.5 MB in the beginning and 63.5 MB in the end (delta: -5.0 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:22,888 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 77.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:22,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 769.93 ms. Allocated memory is still 102.8 MB. Free memory was 58.3 MB in the beginning and 63.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:22,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 77.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 769.93 ms. Allocated memory is still 102.8 MB. Free memory was 58.3 MB in the beginning and 63.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2600]: 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_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/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_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/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_77843842-0b28-4dbe-9e00-ad1662f8459d/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 0eb0a93133a0d165b4e13ef7269be4b8c3f0f81976a167102da919b09b6c6616 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:25,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:25,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:25,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:25,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:25,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:25,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:25,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:25,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:25,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:25,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:25,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:25,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:25,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:25,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:25,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:25,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:25,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:25,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:25,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:25,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:25,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:25,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:25,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:25,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:25,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:25,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:25,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:25,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:25,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:25,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:25,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:25,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:25,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:25,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:25,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:25,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:25,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:25,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:25,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:25,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:25,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:44:25,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:25,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:25,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:25,374 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:25,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:25,374 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:25,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:25,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:25,376 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:25,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:25,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:25,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:25,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:25,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:25,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:25,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:25,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:25,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:25,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:25,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:25,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:25,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:25,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:25,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:25,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:25,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:25,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:25,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:25,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:25,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:25,383 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:25,383 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:25,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:25,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:25,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:25,384 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_77843842-0b28-4dbe-9e00-ad1662f8459d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb0a93133a0d165b4e13ef7269be4b8c3f0f81976a167102da919b09b6c6616 [2021-11-07 01:44:25,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:25,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:25,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:25,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:25,766 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:25,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product19.cil.c [2021-11-07 01:44:25,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/8e84ee6d7/13f177c7709845418cc1d50b1b9f069b/FLAG5ceb47565 [2021-11-07 01:44:26,516 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:26,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/sv-benchmarks/c/product-lines/email_spec3_product19.cil.c [2021-11-07 01:44:26,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/8e84ee6d7/13f177c7709845418cc1d50b1b9f069b/FLAG5ceb47565 [2021-11-07 01:44:26,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/data/8e84ee6d7/13f177c7709845418cc1d50b1b9f069b [2021-11-07 01:44:26,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:26,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:26,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:26,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:26,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:26,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:26" (1/1) ... [2021-11-07 01:44:26,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790590a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:26, skipping insertion in model container [2021-11-07 01:44:26,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:26" (1/1) ... [2021-11-07 01:44:26,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:26,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:27,050 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_77843842-0b28-4dbe-9e00-ad1662f8459d/sv-benchmarks/c/product-lines/email_spec3_product19.cil.c[8336,8349] [2021-11-07 01:44:27,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:27,298 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:27,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:27,333 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_77843842-0b28-4dbe-9e00-ad1662f8459d/sv-benchmarks/c/product-lines/email_spec3_product19.cil.c[8336,8349] [2021-11-07 01:44:27,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:27,426 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:27,448 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_77843842-0b28-4dbe-9e00-ad1662f8459d/sv-benchmarks/c/product-lines/email_spec3_product19.cil.c[8336,8349] [2021-11-07 01:44:27,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:27,571 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:27,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27 WrapperNode [2021-11-07 01:44:27,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:27,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:27,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:27,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:27,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:27,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:27,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:27,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:27,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:27,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:27,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:27,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:27,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (1/1) ... [2021-11-07 01:44:27,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:27,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:27,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:44:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:27,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:32,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:32,326 INFO L299 CfgBuilder]: Removed 319 assume(true) statements. [2021-11-07 01:44:32,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:32 BoogieIcfgContainer [2021-11-07 01:44:32,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:32,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:32,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:32,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:32,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:26" (1/3) ... [2021-11-07 01:44:32,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1951f7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:32, skipping insertion in model container [2021-11-07 01:44:32,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:27" (2/3) ... [2021-11-07 01:44:32,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1951f7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:32, skipping insertion in model container [2021-11-07 01:44:32,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:32" (3/3) ... [2021-11-07 01:44:32,338 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product19.cil.c [2021-11-07 01:44:32,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:32,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 01:44:32,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:32,416 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 01:44:32,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:44:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 487 states, 482 states have (on average 1.7468879668049793) internal successors, (842), 486 states have internal predecessors, (842), 0 states have call successors, (0), 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 01:44:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:44:32,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:32,486 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:32,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1907201492, now seen corresponding path program 1 times [2021-11-07 01:44:32,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:32,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045296621] [2021-11-07 01:44:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:32,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:32,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:32,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:32,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:33,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:44:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:33,306 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 01:44:33,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:33,433 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 01:44:33,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045296621] [2021-11-07 01:44:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045296621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:33,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:33,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:44:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108419674] [2021-11-07 01:44:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:44:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:44:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:44:33,458 INFO L87 Difference]: Start difference. First operand has 487 states, 482 states have (on average 1.7468879668049793) internal successors, (842), 486 states have internal predecessors, (842), 0 states have call successors, (0), 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 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:33,512 INFO L93 Difference]: Finished difference Result 732 states and 1243 transitions. [2021-11-07 01:44:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:44:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:44:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:33,528 INFO L225 Difference]: With dead ends: 732 [2021-11-07 01:44:33,529 INFO L226 Difference]: Without dead ends: 420 [2021-11-07 01:44:33,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 90 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 01:44:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-07 01:44:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-11-07 01:44:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.7427884615384615) internal successors, (725), 419 states have internal predecessors, (725), 0 states have call successors, (0), 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 01:44:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 725 transitions. [2021-11-07 01:44:33,610 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 725 transitions. Word has length 46 [2021-11-07 01:44:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:33,611 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 725 transitions. [2021-11-07 01:44:33,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 725 transitions. [2021-11-07 01:44:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:44:33,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:33,616 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] [2021-11-07 01:44:33,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:33,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,831 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash -518743143, now seen corresponding path program 1 times [2021-11-07 01:44:33,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:33,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793008423] [2021-11-07 01:44:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:33,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:33,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:33,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:34,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:34,392 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 01:44:34,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:34,569 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 01:44:34,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:34,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793008423] [2021-11-07 01:44:34,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793008423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:34,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:34,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:34,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159829929] [2021-11-07 01:44:34,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:34,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:34,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:34,573 INFO L87 Difference]: Start difference. First operand 420 states and 725 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:34,713 INFO L93 Difference]: Finished difference Result 1230 states and 2127 transitions. [2021-11-07 01:44:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:44:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:34,723 INFO L225 Difference]: With dead ends: 1230 [2021-11-07 01:44:34,723 INFO L226 Difference]: Without dead ends: 825 [2021-11-07 01:44:34,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 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 01:44:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-07 01:44:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 419. [2021-11-07 01:44:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 415 states have (on average 1.7349397590361446) internal successors, (720), 418 states have internal predecessors, (720), 0 states have call successors, (0), 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 01:44:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 720 transitions. [2021-11-07 01:44:34,787 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 720 transitions. Word has length 47 [2021-11-07 01:44:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:34,788 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 720 transitions. [2021-11-07 01:44:34,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 720 transitions. [2021-11-07 01:44:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:44:34,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:34,795 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] [2021-11-07 01:44:34,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:34,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:34,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1013129089, now seen corresponding path program 1 times [2021-11-07 01:44:35,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:35,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209370671] [2021-11-07 01:44:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:35,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:35,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:35,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:44:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:35,584 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 01:44:35,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:35,750 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 01:44:35,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:35,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209370671] [2021-11-07 01:44:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209370671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:35,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:35,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:35,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732899513] [2021-11-07 01:44:35,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:35,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:35,753 INFO L87 Difference]: Start difference. First operand 419 states and 720 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:44:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:35,979 INFO L93 Difference]: Finished difference Result 1593 states and 2742 transitions. [2021-11-07 01:44:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:44:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:35,989 INFO L225 Difference]: With dead ends: 1593 [2021-11-07 01:44:35,990 INFO L226 Difference]: Without dead ends: 1192 [2021-11-07 01:44:35,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:44:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-11-07 01:44:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 418. [2021-11-07 01:44:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.7294685990338163) internal successors, (716), 417 states have internal predecessors, (716), 0 states have call successors, (0), 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 01:44:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 716 transitions. [2021-11-07 01:44:36,034 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 716 transitions. Word has length 49 [2021-11-07 01:44:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:36,034 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 716 transitions. [2021-11-07 01:44:36,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:44:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 716 transitions. [2021-11-07 01:44:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:44:36,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:36,040 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] [2021-11-07 01:44:36,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:36,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:36,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:36,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1367974702, now seen corresponding path program 1 times [2021-11-07 01:44:36,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:36,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999256902] [2021-11-07 01:44:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:36,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:36,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:36,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:36,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:44:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:36,832 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 01:44:36,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:36,974 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 01:44:36,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:36,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999256902] [2021-11-07 01:44:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999256902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:36,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:36,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:36,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17312870] [2021-11-07 01:44:36,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:36,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:36,988 INFO L87 Difference]: Start difference. First operand 418 states and 716 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:44:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:37,057 INFO L93 Difference]: Finished difference Result 833 states and 1429 transitions. [2021-11-07 01:44:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 50 [2021-11-07 01:44:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:37,061 INFO L225 Difference]: With dead ends: 833 [2021-11-07 01:44:37,061 INFO L226 Difference]: Without dead ends: 423 [2021-11-07 01:44:37,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 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 01:44:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-07 01:44:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 418. [2021-11-07 01:44:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.7222222222222223) internal successors, (713), 417 states have internal predecessors, (713), 0 states have call successors, (0), 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 01:44:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 713 transitions. [2021-11-07 01:44:37,095 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 713 transitions. Word has length 50 [2021-11-07 01:44:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:37,095 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 713 transitions. [2021-11-07 01:44:37,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:44:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 713 transitions. [2021-11-07 01:44:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:44:37,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:37,097 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] [2021-11-07 01:44:37,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:37,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:37,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1384909465, now seen corresponding path program 1 times [2021-11-07 01:44:37,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:37,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028031482] [2021-11-07 01:44:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:37,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:37,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:37,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:44:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:44:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:37,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:38,040 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 01:44:38,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:38,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028031482] [2021-11-07 01:44:38,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028031482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:38,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:38,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:38,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815597150] [2021-11-07 01:44:38,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:38,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:38,043 INFO L87 Difference]: Start difference. First operand 418 states and 713 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:38,257 INFO L93 Difference]: Finished difference Result 1580 states and 2718 transitions. [2021-11-07 01:44:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:44:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:44:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:38,267 INFO L225 Difference]: With dead ends: 1580 [2021-11-07 01:44:38,267 INFO L226 Difference]: Without dead ends: 1188 [2021-11-07 01:44:38,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 01:44:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-11-07 01:44:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 418. [2021-11-07 01:44:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.714975845410628) internal successors, (710), 417 states have internal predecessors, (710), 0 states have call successors, (0), 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 01:44:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 710 transitions. [2021-11-07 01:44:38,307 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 710 transitions. Word has length 51 [2021-11-07 01:44:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:38,307 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 710 transitions. [2021-11-07 01:44:38,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 710 transitions. [2021-11-07 01:44:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:44:38,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:38,310 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] [2021-11-07 01:44:38,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:38,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:38,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1404373282, now seen corresponding path program 1 times [2021-11-07 01:44:38,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:38,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549910327] [2021-11-07 01:44:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:38,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:38,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:38,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:44:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:38,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:39,076 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 01:44:39,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:39,204 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 01:44:39,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:39,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549910327] [2021-11-07 01:44:39,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549910327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:39,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:39,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:39,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28106150] [2021-11-07 01:44:39,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:39,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:39,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:39,208 INFO L87 Difference]: Start difference. First operand 418 states and 710 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:39,279 INFO L93 Difference]: Finished difference Result 988 states and 1677 transitions. [2021-11-07 01:44:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:44:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:44:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:39,285 INFO L225 Difference]: With dead ends: 988 [2021-11-07 01:44:39,285 INFO L226 Difference]: Without dead ends: 810 [2021-11-07 01:44:39,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 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 01:44:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-11-07 01:44:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 632. [2021-11-07 01:44:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 628 states have (on average 1.7531847133757963) internal successors, (1101), 631 states have internal predecessors, (1101), 0 states have call successors, (0), 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 01:44:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1101 transitions. [2021-11-07 01:44:39,349 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1101 transitions. Word has length 53 [2021-11-07 01:44:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:39,349 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1101 transitions. [2021-11-07 01:44:39,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1101 transitions. [2021-11-07 01:44:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:44:39,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:39,352 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 01:44:39,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:39,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:39,570 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 381308339, now seen corresponding path program 1 times [2021-11-07 01:44:39,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:39,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47668612] [2021-11-07 01:44:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:39,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:39,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:39,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:44:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:40,214 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 01:44:40,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:40,361 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 01:44:40,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:40,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47668612] [2021-11-07 01:44:40,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47668612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:40,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:40,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:40,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742053417] [2021-11-07 01:44:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:40,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:40,363 INFO L87 Difference]: Start difference. First operand 632 states and 1101 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 01:44:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:40,452 INFO L93 Difference]: Finished difference Result 1520 states and 2651 transitions. [2021-11-07 01:44:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 01:44:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:40,458 INFO L225 Difference]: With dead ends: 1520 [2021-11-07 01:44:40,458 INFO L226 Difference]: Without dead ends: 972 [2021-11-07 01:44:40,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 01:44:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-11-07 01:44:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 794. [2021-11-07 01:44:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 790 states have (on average 1.7658227848101267) internal successors, (1395), 793 states have internal predecessors, (1395), 0 states have call successors, (0), 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 01:44:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1395 transitions. [2021-11-07 01:44:40,521 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1395 transitions. Word has length 65 [2021-11-07 01:44:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:40,522 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1395 transitions. [2021-11-07 01:44:40,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 01:44:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1395 transitions. [2021-11-07 01:44:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:44:40,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:40,524 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 01:44:40,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:40,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:40,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash -22614574, now seen corresponding path program 1 times [2021-11-07 01:44:40,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:40,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020209608] [2021-11-07 01:44:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:40,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:40,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:40,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:40,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:44:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:41,381 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 01:44:41,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:41,535 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 01:44:41,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:41,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020209608] [2021-11-07 01:44:41,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020209608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:41,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:41,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:41,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035566447] [2021-11-07 01:44:41,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:41,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:41,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:41,537 INFO L87 Difference]: Start difference. First operand 794 states and 1395 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:44:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:41,683 INFO L93 Difference]: Finished difference Result 2050 states and 3619 transitions. [2021-11-07 01:44:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:41,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:44:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:41,693 INFO L225 Difference]: With dead ends: 2050 [2021-11-07 01:44:41,693 INFO L226 Difference]: Without dead ends: 1344 [2021-11-07 01:44:41,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:44:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-11-07 01:44:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1166. [2021-11-07 01:44:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1162 states have (on average 1.7839931153184165) internal successors, (2073), 1165 states have internal predecessors, (2073), 0 states have call successors, (0), 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 01:44:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2073 transitions. [2021-11-07 01:44:41,811 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2073 transitions. Word has length 66 [2021-11-07 01:44:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:41,812 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2073 transitions. [2021-11-07 01:44:41,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:44:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2073 transitions. [2021-11-07 01:44:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:44:41,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:41,815 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] [2021-11-07 01:44:41,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:42,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:42,031 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -183359870, now seen corresponding path program 1 times [2021-11-07 01:44:42,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:42,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728119663] [2021-11-07 01:44:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:42,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:42,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:42,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:44:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:42,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:42,628 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 01:44:42,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:42,786 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 01:44:42,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:42,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728119663] [2021-11-07 01:44:42,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728119663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:42,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:42,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:42,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790447333] [2021-11-07 01:44:42,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:42,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:42,788 INFO L87 Difference]: Start difference. First operand 1166 states and 2073 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:42,915 INFO L93 Difference]: Finished difference Result 2264 states and 4007 transitions. [2021-11-07 01:44:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:42,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:44:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:42,924 INFO L225 Difference]: With dead ends: 2264 [2021-11-07 01:44:42,924 INFO L226 Difference]: Without dead ends: 1344 [2021-11-07 01:44:42,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 01:44:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-11-07 01:44:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1166. [2021-11-07 01:44:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1162 states have (on average 1.7822719449225473) internal successors, (2071), 1165 states have internal predecessors, (2071), 0 states have call successors, (0), 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 01:44:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2071 transitions. [2021-11-07 01:44:43,023 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2071 transitions. Word has length 67 [2021-11-07 01:44:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:43,024 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2071 transitions. [2021-11-07 01:44:43,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2071 transitions. [2021-11-07 01:44:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:44:43,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:43,027 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] [2021-11-07 01:44:43,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:43,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:43,242 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash 998811233, now seen corresponding path program 1 times [2021-11-07 01:44:43,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:43,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463010358] [2021-11-07 01:44:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:43,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:43,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:43,244 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:43,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:44:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:44,015 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 01:44:44,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:44,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463010358] [2021-11-07 01:44:44,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463010358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:44,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:44,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:44,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222072742] [2021-11-07 01:44:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:44,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:44,017 INFO L87 Difference]: Start difference. First operand 1166 states and 2071 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:44:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:44,159 INFO L93 Difference]: Finished difference Result 3138 states and 5602 transitions. [2021-11-07 01:44:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 01:44:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:44,172 INFO L225 Difference]: With dead ends: 3138 [2021-11-07 01:44:44,172 INFO L226 Difference]: Without dead ends: 2068 [2021-11-07 01:44:44,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:44:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-11-07 01:44:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1890. [2021-11-07 01:44:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1886 states have (on average 1.79745493107105) internal successors, (3390), 1889 states have internal predecessors, (3390), 0 states have call successors, (0), 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 01:44:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3390 transitions. [2021-11-07 01:44:44,331 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3390 transitions. Word has length 67 [2021-11-07 01:44:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:44,332 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 3390 transitions. [2021-11-07 01:44:44,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:44:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3390 transitions. [2021-11-07 01:44:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:44:44,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:44,341 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 01:44:44,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:44,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash -766770156, now seen corresponding path program 1 times [2021-11-07 01:44:44,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:44,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018075064] [2021-11-07 01:44:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:44,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:44,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:44,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:44:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:45,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:45,214 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 01:44:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:45,373 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 01:44:45,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:45,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018075064] [2021-11-07 01:44:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018075064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:45,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:45,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:45,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081940400] [2021-11-07 01:44:45,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:45,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:45,376 INFO L87 Difference]: Start difference. First operand 1890 states and 3390 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 01:44:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:45,618 INFO L93 Difference]: Finished difference Result 5046 states and 9078 transitions. [2021-11-07 01:44:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 68 [2021-11-07 01:44:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:45,639 INFO L225 Difference]: With dead ends: 5046 [2021-11-07 01:44:45,639 INFO L226 Difference]: Without dead ends: 3286 [2021-11-07 01:44:45,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:44:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-11-07 01:44:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3108. [2021-11-07 01:44:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3104 states have (on average 1.805090206185567) internal successors, (5603), 3107 states have internal predecessors, (5603), 0 states have call successors, (0), 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 01:44:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 5603 transitions. [2021-11-07 01:44:45,900 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 5603 transitions. Word has length 68 [2021-11-07 01:44:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:45,902 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 5603 transitions. [2021-11-07 01:44:45,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 01:44:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 5603 transitions. [2021-11-07 01:44:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:44:45,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:45,909 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 01:44:45,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:46,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:46,123 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash 534247090, now seen corresponding path program 1 times [2021-11-07 01:44:46,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:46,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895480174] [2021-11-07 01:44:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:46,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:46,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:46,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:46,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:44:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:46,819 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 01:44:46,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:46,974 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 01:44:46,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:46,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895480174] [2021-11-07 01:44:46,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895480174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:46,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:46,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:46,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057352682] [2021-11-07 01:44:46,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:46,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:46,976 INFO L87 Difference]: Start difference. First operand 3108 states and 5603 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:47,364 INFO L93 Difference]: Finished difference Result 8416 states and 15200 transitions. [2021-11-07 01:44:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:44:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:47,407 INFO L225 Difference]: With dead ends: 8416 [2021-11-07 01:44:47,408 INFO L226 Difference]: Without dead ends: 5472 [2021-11-07 01:44:47,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:44:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-11-07 01:44:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 5294. [2021-11-07 01:44:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5290 states have (on average 1.8079395085066163) internal successors, (9564), 5293 states have internal predecessors, (9564), 0 states have call successors, (0), 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 01:44:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 9564 transitions. [2021-11-07 01:44:47,830 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 9564 transitions. Word has length 69 [2021-11-07 01:44:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 5294 states and 9564 transitions. [2021-11-07 01:44:47,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 9564 transitions. [2021-11-07 01:44:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:44:47,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:47,837 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] [2021-11-07 01:44:47,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:48,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:48,052 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1833484586, now seen corresponding path program 1 times [2021-11-07 01:44:48,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:48,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113287919] [2021-11-07 01:44:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:48,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:48,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:48,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:44:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:48,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:48,826 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 01:44:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:49,050 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 01:44:49,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:49,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113287919] [2021-11-07 01:44:49,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113287919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:49,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:49,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:49,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636069726] [2021-11-07 01:44:49,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:49,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:49,052 INFO L87 Difference]: Start difference. First operand 5294 states and 9564 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:44:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:52,174 INFO L93 Difference]: Finished difference Result 19816 states and 35837 transitions. [2021-11-07 01:44:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:44:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:44:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:52,251 INFO L225 Difference]: With dead ends: 19816 [2021-11-07 01:44:52,251 INFO L226 Difference]: Without dead ends: 14766 [2021-11-07 01:44:52,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 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 01:44:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14766 states. [2021-11-07 01:44:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14766 to 5244. [2021-11-07 01:44:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5244 states, 5240 states have (on average 1.7870229007633587) internal successors, (9364), 5243 states have internal predecessors, (9364), 0 states have call successors, (0), 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 01:44:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5244 states to 5244 states and 9364 transitions. [2021-11-07 01:44:52,840 INFO L78 Accepts]: Start accepts. Automaton has 5244 states and 9364 transitions. Word has length 70 [2021-11-07 01:44:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:52,840 INFO L470 AbstractCegarLoop]: Abstraction has 5244 states and 9364 transitions. [2021-11-07 01:44:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 01:44:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5244 states and 9364 transitions. [2021-11-07 01:44:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:44:52,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:52,848 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 01:44:52,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:53,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:53,063 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash 371260037, now seen corresponding path program 1 times [2021-11-07 01:44:53,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:53,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064506811] [2021-11-07 01:44:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:53,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:53,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:53,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:44:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:53,906 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 01:44:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:54,064 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 01:44:54,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:54,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064506811] [2021-11-07 01:44:54,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064506811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:54,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:54,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:54,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743548804] [2021-11-07 01:44:54,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:54,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:54,066 INFO L87 Difference]: Start difference. First operand 5244 states and 9364 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:54,535 INFO L93 Difference]: Finished difference Result 15153 states and 27106 transitions. [2021-11-07 01:44:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:54,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:44:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:54,560 INFO L225 Difference]: With dead ends: 15153 [2021-11-07 01:44:54,560 INFO L226 Difference]: Without dead ends: 10080 [2021-11-07 01:44:54,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:44:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10080 states. [2021-11-07 01:44:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10080 to 9902. [2021-11-07 01:44:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9902 states, 9898 states have (on average 1.7883410790058598) internal successors, (17701), 9901 states have internal predecessors, (17701), 0 states have call successors, (0), 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 01:44:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9902 states to 9902 states and 17701 transitions. [2021-11-07 01:44:55,281 INFO L78 Accepts]: Start accepts. Automaton has 9902 states and 17701 transitions. Word has length 70 [2021-11-07 01:44:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:55,281 INFO L470 AbstractCegarLoop]: Abstraction has 9902 states and 17701 transitions. [2021-11-07 01:44:55,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9902 states and 17701 transitions. [2021-11-07 01:44:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:44:55,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:55,290 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] [2021-11-07 01:44:55,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:55,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:55,506 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:44:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 293484689, now seen corresponding path program 1 times [2021-11-07 01:44:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:55,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028119299] [2021-11-07 01:44:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:55,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:55,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:55,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:44:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:56,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:56,355 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 01:44:56,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:56,588 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 01:44:56,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:56,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028119299] [2021-11-07 01:44:56,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028119299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:56,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2010732307] [2021-11-07 01:44:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:56,589 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:56,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:56,594 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:56,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:44:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:44:57,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:57,698 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 01:44:57,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:57,960 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 01:44:57,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2010732307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:57,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:57,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:44:57,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598535260] [2021-11-07 01:44:57,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:44:57,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:44:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:44:57,963 INFO L87 Difference]: Start difference. First operand 9902 states and 17701 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:03,424 INFO L93 Difference]: Finished difference Result 58479 states and 105039 transitions. [2021-11-07 01:45:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:45:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:45:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:03,577 INFO L225 Difference]: With dead ends: 58479 [2021-11-07 01:45:03,578 INFO L226 Difference]: Without dead ends: 58319 [2021-11-07 01:45:03,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:45:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58319 states. [2021-11-07 01:45:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58319 to 19742. [2021-11-07 01:45:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19742 states, 19738 states have (on average 1.7887830580605937) internal successors, (35307), 19741 states have internal predecessors, (35307), 0 states have call successors, (0), 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 01:45:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19742 states to 19742 states and 35307 transitions. [2021-11-07 01:45:05,647 INFO L78 Accepts]: Start accepts. Automaton has 19742 states and 35307 transitions. Word has length 71 [2021-11-07 01:45:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:05,648 INFO L470 AbstractCegarLoop]: Abstraction has 19742 states and 35307 transitions. [2021-11-07 01:45:05,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 19742 states and 35307 transitions. [2021-11-07 01:45:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:45:05,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:05,663 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] [2021-11-07 01:45:05,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:45:05,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:06,076 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:45:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1782958694, now seen corresponding path program 1 times [2021-11-07 01:45:06,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:06,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598561037] [2021-11-07 01:45:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:06,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:06,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:06,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:45:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:06,954 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 01:45:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:07,145 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 01:45:07,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:07,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598561037] [2021-11-07 01:45:07,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598561037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:07,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597414816] [2021-11-07 01:45:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:07,146 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:07,146 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:07,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:45:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:45:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:08,218 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 01:45:08,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:08,417 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 01:45:08,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597414816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:08,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:08,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:45:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800329637] [2021-11-07 01:45:08,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:45:08,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:45:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:45:08,419 INFO L87 Difference]: Start difference. First operand 19742 states and 35307 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:45:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:11,495 INFO L93 Difference]: Finished difference Result 20070 states and 35838 transitions. [2021-11-07 01:45:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:45:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:45:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:11,543 INFO L225 Difference]: With dead ends: 20070 [2021-11-07 01:45:11,543 INFO L226 Difference]: Without dead ends: 19784 [2021-11-07 01:45:11,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19784 states. [2021-11-07 01:45:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19784 to 19736. [2021-11-07 01:45:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19736 states, 19732 states have (on average 1.7886681532535982) internal successors, (35294), 19735 states have internal predecessors, (35294), 0 states have call successors, (0), 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 01:45:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19736 states to 19736 states and 35294 transitions. [2021-11-07 01:45:12,751 INFO L78 Accepts]: Start accepts. Automaton has 19736 states and 35294 transitions. Word has length 72 [2021-11-07 01:45:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:12,752 INFO L470 AbstractCegarLoop]: Abstraction has 19736 states and 35294 transitions. [2021-11-07 01:45:12,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:45:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 19736 states and 35294 transitions. [2021-11-07 01:45:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:45:12,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:12,765 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] [2021-11-07 01:45:12,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:12,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:45:13,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:13,181 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:45:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1308334140, now seen corresponding path program 1 times [2021-11-07 01:45:13,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:13,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613535483] [2021-11-07 01:45:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:13,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:13,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:13,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:13,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:45:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:45:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:14,045 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 01:45:14,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:14,211 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 01:45:14,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:14,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613535483] [2021-11-07 01:45:14,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613535483] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:14,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:14,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:45:14,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442732756] [2021-11-07 01:45:14,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:14,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:14,213 INFO L87 Difference]: Start difference. First operand 19736 states and 35294 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:45:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:15,301 INFO L93 Difference]: Finished difference Result 38562 states and 69178 transitions. [2021-11-07 01:45:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:15,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:45:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:15,336 INFO L225 Difference]: With dead ends: 38562 [2021-11-07 01:45:15,337 INFO L226 Difference]: Without dead ends: 19073 [2021-11-07 01:45:15,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 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 01:45:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19073 states. [2021-11-07 01:45:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19073 to 9900. [2021-11-07 01:45:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9896 states have (on average 1.7877930476960389) internal successors, (17692), 9899 states have internal predecessors, (17692), 0 states have call successors, (0), 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 01:45:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 17692 transitions. [2021-11-07 01:45:16,243 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 17692 transitions. Word has length 72 [2021-11-07 01:45:16,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:16,244 INFO L470 AbstractCegarLoop]: Abstraction has 9900 states and 17692 transitions. [2021-11-07 01:45:16,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:45:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 17692 transitions. [2021-11-07 01:45:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:45:16,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:16,251 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] [2021-11-07 01:45:16,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:45:16,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:16,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:45:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash -246428984, now seen corresponding path program 1 times [2021-11-07 01:45:16,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:16,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860247056] [2021-11-07 01:45:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:16,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:16,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:16,458 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:16,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:45:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:17,385 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 01:45:17,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:17,579 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 01:45:17,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:17,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860247056] [2021-11-07 01:45:17,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860247056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:17,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914783953] [2021-11-07 01:45:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:17,580 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:17,581 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:17,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:45:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:45:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:18,880 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 01:45:18,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:19,199 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 01:45:19,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914783953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:19,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:19,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 01:45:19,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615415690] [2021-11-07 01:45:19,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:45:19,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:45:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:45:19,201 INFO L87 Difference]: Start difference. First operand 9900 states and 17692 transitions. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 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 01:45:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:28,601 INFO L93 Difference]: Finished difference Result 14477 states and 24594 transitions. [2021-11-07 01:45:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 01:45:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:45:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:28,630 INFO L225 Difference]: With dead ends: 14477 [2021-11-07 01:45:28,630 INFO L226 Difference]: Without dead ends: 14338 [2021-11-07 01:45:28,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4693 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3087, Invalid=11919, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 01:45:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14338 states. [2021-11-07 01:45:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14338 to 10125. [2021-11-07 01:45:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10125 states, 10121 states have (on average 1.7830253927477522) internal successors, (18046), 10124 states have internal predecessors, (18046), 0 states have call successors, (0), 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 01:45:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10125 states to 10125 states and 18046 transitions. [2021-11-07 01:45:29,384 INFO L78 Accepts]: Start accepts. Automaton has 10125 states and 18046 transitions. Word has length 74 [2021-11-07 01:45:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:29,384 INFO L470 AbstractCegarLoop]: Abstraction has 10125 states and 18046 transitions. [2021-11-07 01:45:29,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 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 01:45:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10125 states and 18046 transitions. [2021-11-07 01:45:29,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:45:29,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:29,393 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] [2021-11-07 01:45:29,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:29,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:45:29,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,798 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:45:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1304492018, now seen corresponding path program 1 times [2021-11-07 01:45:29,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:29,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165234292] [2021-11-07 01:45:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:29,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:29,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:29,800 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:29,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:45:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:30,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:30,784 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 01:45:30,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:30,986 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 01:45:30,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:30,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165234292] [2021-11-07 01:45:30,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165234292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:30,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43137124] [2021-11-07 01:45:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:30,988 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:31,001 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:31,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:45:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:45:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:32,807 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 01:45:32,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:33,182 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 01:45:33,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43137124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:33,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:33,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:45:33,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038289506] [2021-11-07 01:45:33,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:45:33,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:45:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:45:33,184 INFO L87 Difference]: Start difference. First operand 10125 states and 18046 transitions. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 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 01:45:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:57,180 INFO L93 Difference]: Finished difference Result 33807 states and 59378 transitions. [2021-11-07 01:45:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:45:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:45:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:57,229 INFO L225 Difference]: With dead ends: 33807 [2021-11-07 01:45:57,229 INFO L226 Difference]: Without dead ends: 33505 [2021-11-07 01:45:57,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:45:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33505 states. [2021-11-07 01:45:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33505 to 20540. [2021-11-07 01:45:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20540 states, 20536 states have (on average 1.7802395792754189) internal successors, (36559), 20539 states have internal predecessors, (36559), 0 states have call successors, (0), 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 01:45:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20540 states to 20540 states and 36559 transitions. [2021-11-07 01:45:58,685 INFO L78 Accepts]: Start accepts. Automaton has 20540 states and 36559 transitions. Word has length 75 [2021-11-07 01:45:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 20540 states and 36559 transitions. [2021-11-07 01:45:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 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 01:45:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 20540 states and 36559 transitions. [2021-11-07 01:45:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:45:58,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:58,696 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] [2021-11-07 01:45:58,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:58,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:59,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,102 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:45:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1150759778, now seen corresponding path program 1 times [2021-11-07 01:45:59,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:59,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767822312] [2021-11-07 01:45:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:59,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:59,105 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:59,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:46:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:00,183 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 01:46:00,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:00,400 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 01:46:00,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:00,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767822312] [2021-11-07 01:46:00,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767822312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:00,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1961768179] [2021-11-07 01:46:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:00,400 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:00,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:00,405 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:00,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:46:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:46:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:01,834 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 01:46:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:01,974 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 01:46:01,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1961768179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:01,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:01,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:46:01,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682560303] [2021-11-07 01:46:01,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:46:01,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:46:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:46:01,976 INFO L87 Difference]: Start difference. First operand 20540 states and 36559 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:03,500 INFO L93 Difference]: Finished difference Result 21823 states and 38547 transitions. [2021-11-07 01:46:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:46:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:46:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:03,526 INFO L225 Difference]: With dead ends: 21823 [2021-11-07 01:46:03,527 INFO L226 Difference]: Without dead ends: 20863 [2021-11-07 01:46:03,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:46:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-11-07 01:46:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 20449. [2021-11-07 01:46:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20449 states, 20445 states have (on average 1.7801907556859868) internal successors, (36396), 20448 states have internal predecessors, (36396), 0 states have call successors, (0), 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 01:46:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20449 states to 20449 states and 36396 transitions. [2021-11-07 01:46:04,925 INFO L78 Accepts]: Start accepts. Automaton has 20449 states and 36396 transitions. Word has length 75 [2021-11-07 01:46:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:04,925 INFO L470 AbstractCegarLoop]: Abstraction has 20449 states and 36396 transitions. [2021-11-07 01:46:04,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 20449 states and 36396 transitions. [2021-11-07 01:46:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:04,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:04,936 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] [2021-11-07 01:46:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:05,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:46:05,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:05,337 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:46:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:05,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1785766757, now seen corresponding path program 1 times [2021-11-07 01:46:05,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:05,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828350570] [2021-11-07 01:46:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:05,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:05,339 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:05,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:46:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:06,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:06,446 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 01:46:06,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:06,652 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 01:46:06,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:06,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828350570] [2021-11-07 01:46:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828350570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:06,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787687652] [2021-11-07 01:46:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:06,652 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:06,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:06,653 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:06,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:46:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:46:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:08,670 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 01:46:08,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:09,065 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 01:46:09,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787687652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:09,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:09,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:46:09,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834035931] [2021-11-07 01:46:09,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:46:09,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:46:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:46:09,067 INFO L87 Difference]: Start difference. First operand 20449 states and 36396 transitions. Second operand has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 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 01:46:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:33,331 INFO L93 Difference]: Finished difference Result 56677 states and 99451 transitions. [2021-11-07 01:46:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:46:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:46:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:33,412 INFO L225 Difference]: With dead ends: 56677 [2021-11-07 01:46:33,412 INFO L226 Difference]: Without dead ends: 56085 [2021-11-07 01:46:33,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:46:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56085 states. [2021-11-07 01:46:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56085 to 40846. [2021-11-07 01:46:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40846 states, 40842 states have (on average 1.779834484109495) internal successors, (72692), 40845 states have internal predecessors, (72692), 0 states have call successors, (0), 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 01:46:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40846 states to 40846 states and 72692 transitions. [2021-11-07 01:46:36,527 INFO L78 Accepts]: Start accepts. Automaton has 40846 states and 72692 transitions. Word has length 76 [2021-11-07 01:46:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:36,528 INFO L470 AbstractCegarLoop]: Abstraction has 40846 states and 72692 transitions. [2021-11-07 01:46:36,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 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 01:46:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40846 states and 72692 transitions. [2021-11-07 01:46:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:36,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:36,545 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] [2021-11-07 01:46:36,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:36,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-07 01:46:36,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:36,946 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:46:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1785826339, now seen corresponding path program 1 times [2021-11-07 01:46:36,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:36,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727993450] [2021-11-07 01:46:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:36,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:36,949 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:36,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:46:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:38,344 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 01:46:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:38,584 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 01:46:38,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:38,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727993450] [2021-11-07 01:46:38,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727993450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:38,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276958331] [2021-11-07 01:46:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:38,585 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:38,586 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:46:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:40,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:40,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:40,329 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 01:46:40,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:40,498 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 01:46:40,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [276958331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:40,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796887137] [2021-11-07 01:46:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:40,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:40,499 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 01:46:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:41,973 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 01:46:41,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:42,156 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 01:46:42,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796887137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:42,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:46:42,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:46:42,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890152124] [2021-11-07 01:46:42,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:46:42,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:46:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:46:42,159 INFO L87 Difference]: Start difference. First operand 40846 states and 72692 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:46:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:47,053 INFO L93 Difference]: Finished difference Result 68386 states and 120203 transitions. [2021-11-07 01:46:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:46:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:46:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:47,147 INFO L225 Difference]: With dead ends: 68386 [2021-11-07 01:46:47,148 INFO L226 Difference]: Without dead ends: 66088 [2021-11-07 01:46:47,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:46:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66088 states. [2021-11-07 01:46:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66088 to 60474. [2021-11-07 01:46:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60474 states, 60470 states have (on average 1.7784686621465189) internal successors, (107544), 60473 states have internal predecessors, (107544), 0 states have call successors, (0), 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 01:46:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60474 states to 60474 states and 107544 transitions. [2021-11-07 01:46:52,185 INFO L78 Accepts]: Start accepts. Automaton has 60474 states and 107544 transitions. Word has length 76 [2021-11-07 01:46:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:52,185 INFO L470 AbstractCegarLoop]: Abstraction has 60474 states and 107544 transitions. [2021-11-07 01:46:52,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:46:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 60474 states and 107544 transitions. [2021-11-07 01:46:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:52,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:52,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:52,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:52,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:46:52,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:52,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:52,807 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:46:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash 112156275, now seen corresponding path program 1 times [2021-11-07 01:46:52,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:52,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548716868] [2021-11-07 01:46:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:52,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:52,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:52,810 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:52,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77843842-0b28-4dbe-9e00-ad1662f8459d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:46:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:54,127 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 01:46:54,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:54,318 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 01:46:54,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:54,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548716868] [2021-11-07 01:46:54,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548716868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:54,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:54,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:54,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313110378] [2021-11-07 01:46:54,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:54,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:54,320 INFO L87 Difference]: Start difference. First operand 60474 states and 107544 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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)