./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.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_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/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_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/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_bce7e635-186a-4b67-abb0-216c25e9af34/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 cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:59,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:59,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:59,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:59,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:59,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:59,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:59,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:59,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:59,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:59,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:59,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:59,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:59,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:59,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:59,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:59,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:59,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:59,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:59,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:59,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:59,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:59,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:59,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:59,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:59,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:59,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:59,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:59,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:59,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:59,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:59,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:59,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:59,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:59,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:59,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:59,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:59,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:59,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:59,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:59,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:59,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:55:59,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:59,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:59,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:59,673 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:59,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:59,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:59,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:55:59,674 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:59,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:59,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:55:59,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:55:59,675 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:59,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:55:59,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:55:59,676 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:55:59,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:59,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:59,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:55:59,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:59,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:59,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:59,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:59,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:59,678 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:59,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:59,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:59,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:59,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:59,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:59,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:59,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:59,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:59,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:59,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:59,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:55:59,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:55:59,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:59,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:59,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:59,682 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_bce7e635-186a-4b67-abb0-216c25e9af34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2021-11-07 01:55:59,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:59,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:59,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:59,953 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:59,954 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:59,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-07 01:56:00,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/879ac9fd2/5c034dd0760e4782a4a78b90fe21d7aa/FLAGed97a5fd0 [2021-11-07 01:56:00,641 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:56:00,656 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-07 01:56:00,677 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/879ac9fd2/5c034dd0760e4782a4a78b90fe21d7aa/FLAGed97a5fd0 [2021-11-07 01:56:00,880 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/879ac9fd2/5c034dd0760e4782a4a78b90fe21d7aa [2021-11-07 01:56:00,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:56:00,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:56:00,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:00,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:56:00,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:56:00,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:00" (1/1) ... [2021-11-07 01:56:00,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6e9395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:00, skipping insertion in model container [2021-11-07 01:56:00,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:00" (1/1) ... [2021-11-07 01:56:00,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:56:01,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:01,573 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_bce7e635-186a-4b67-abb0-216c25e9af34/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-07 01:56:01,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:01,588 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 01:56:01,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52d05562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:01, skipping insertion in model container [2021-11-07 01:56:01,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:01,589 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:56:01,592 INFO L168 Benchmark]: Toolchain (without parser) took 705.09 ms. Allocated memory is still 107.0 MB. Free memory was 68.7 MB in the beginning and 68.9 MB in the end (delta: -231.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:01,593 INFO L168 Benchmark]: CDTParser took 0.97 ms. Allocated memory is still 107.0 MB. Free memory was 79.1 MB in the beginning and 79.0 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:56:01,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.58 ms. Allocated memory is still 107.0 MB. Free memory was 68.4 MB in the beginning and 68.9 MB in the end (delta: -521.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:01,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97 ms. Allocated memory is still 107.0 MB. Free memory was 79.1 MB in the beginning and 79.0 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 685.58 ms. Allocated memory is still 107.0 MB. Free memory was 68.4 MB in the beginning and 68.9 MB in the end (delta: -521.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1876]: 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_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/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_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/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_bce7e635-186a-4b67-abb0-216c25e9af34/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 cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:03,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:03,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:03,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:03,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:03,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:03,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:03,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:03,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:03,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:03,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:03,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:03,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:03,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:03,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:03,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:03,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:03,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:03,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:03,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:03,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:03,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:03,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:03,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:03,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:03,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:03,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:03,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:03,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:03,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:03,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:03,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:03,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:03,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:03,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:03,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:03,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:03,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:03,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:03,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:03,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:03,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:56:03,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:03,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:03,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:03,895 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:03,895 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:03,895 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:03,896 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:03,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:03,896 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:03,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:03,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:56:03,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:56:03,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:03,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:56:03,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:03,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:56:03,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:03,900 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:56:03,900 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:56:03,900 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:56:03,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:56:03,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:03,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:56:03,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:03,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:56:03,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:03,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:03,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:03,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:03,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:56:03,902 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:56:03,902 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:03,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:56:03,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:03,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:03,904 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_bce7e635-186a-4b67-abb0-216c25e9af34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2021-11-07 01:56:04,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:56:04,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:56:04,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:56:04,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:56:04,332 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:56:04,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-07 01:56:04,404 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/ff7ef41b2/3e673bf2e9474d278f516fffa1f5b720/FLAG11cffb1bb [2021-11-07 01:56:05,199 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:56:05,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-07 01:56:05,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/ff7ef41b2/3e673bf2e9474d278f516fffa1f5b720/FLAG11cffb1bb [2021-11-07 01:56:05,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/data/ff7ef41b2/3e673bf2e9474d278f516fffa1f5b720 [2021-11-07 01:56:05,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:56:05,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:56:05,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:05,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:56:05,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:56:05,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:05" (1/1) ... [2021-11-07 01:56:05,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c77977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:05, skipping insertion in model container [2021-11-07 01:56:05,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:05" (1/1) ... [2021-11-07 01:56:05,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:56:05,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:06,029 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_bce7e635-186a-4b67-abb0-216c25e9af34/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-07 01:56:06,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:06,061 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:56:06,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:06,225 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_bce7e635-186a-4b67-abb0-216c25e9af34/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-07 01:56:06,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:06,231 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:56:06,336 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_bce7e635-186a-4b67-abb0-216c25e9af34/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-07 01:56:06,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:06,369 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:56:06,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06 WrapperNode [2021-11-07 01:56:06,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:06,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:56:06,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:56:06,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:56:06,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:06,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:07,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:56:07,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:56:07,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:56:07,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:56:07,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:07,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:07,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:07,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:07,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:08,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:08,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:08,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:56:08,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:56:08,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:56:08,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:56:08,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (1/1) ... [2021-11-07 01:56:08,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:08,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:56:08,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:56:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:56:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:56:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:56:08,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:56:32,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:56:32,809 INFO L299 CfgBuilder]: Removed 3017 assume(true) statements. [2021-11-07 01:56:32,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:56:32 BoogieIcfgContainer [2021-11-07 01:56:32,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:56:32,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:56:32,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:56:32,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:56:32,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:56:05" (1/3) ... [2021-11-07 01:56:32,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da32f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:56:32, skipping insertion in model container [2021-11-07 01:56:32,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:06" (2/3) ... [2021-11-07 01:56:32,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da32f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:56:32, skipping insertion in model container [2021-11-07 01:56:32,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:56:32" (3/3) ... [2021-11-07 01:56:32,831 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product28.cil.c [2021-11-07 01:56:32,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:56:32,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:56:32,939 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:56:32,945 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 01:56:32,946 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:56:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 12523 states, 12512 states have (on average 1.8837915601023019) internal successors, (23570), 12522 states have internal predecessors, (23570), 0 states have call successors, (0), 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 01:56:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:56:33,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:33,202 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] [2021-11-07 01:56:33,203 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:56:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:33,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1872061796, now seen corresponding path program 1 times [2021-11-07 01:56:33,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:33,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927465982] [2021-11-07 01:56:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:33,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:33,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:33,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:33,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:56:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:56:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:33,792 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 01:56:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:33,890 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 01:56:33,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927465982] [2021-11-07 01:56:33,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927465982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:33,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:33,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:56:33,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011269165] [2021-11-07 01:56:33,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:33,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:56:33,950 INFO L87 Difference]: Start difference. First operand has 12523 states, 12512 states have (on average 1.8837915601023019) internal successors, (23570), 12522 states have internal predecessors, (23570), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 01:56:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:38,826 INFO L93 Difference]: Finished difference Result 87283 states and 164271 transitions. [2021-11-07 01:56:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:56:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 30 [2021-11-07 01:56:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:39,274 INFO L225 Difference]: With dead ends: 87283 [2021-11-07 01:56:39,274 INFO L226 Difference]: Without dead ends: 74761 [2021-11-07 01:56:39,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74761 states. [2021-11-07 01:56:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74761 to 12535. [2021-11-07 01:56:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12535 states, 12525 states have (on average 1.8815968063872255) internal successors, (23567), 12534 states have internal predecessors, (23567), 0 states have call successors, (0), 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 01:56:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12535 states to 12535 states and 23567 transitions. [2021-11-07 01:56:40,428 INFO L78 Accepts]: Start accepts. Automaton has 12535 states and 23567 transitions. Word has length 30 [2021-11-07 01:56:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:40,428 INFO L470 AbstractCegarLoop]: Abstraction has 12535 states and 23567 transitions. [2021-11-07 01:56:40,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 01:56:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 12535 states and 23567 transitions. [2021-11-07 01:56:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:56:40,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:40,432 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] [2021-11-07 01:56:40,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:40,652 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:56:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1550710714, now seen corresponding path program 1 times [2021-11-07 01:56:40,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:40,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974709776] [2021-11-07 01:56:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:40,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:40,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:40,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:56:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:41,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:56:41,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:41,135 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 01:56:41,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:41,239 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 01:56:41,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:41,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974709776] [2021-11-07 01:56:41,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974709776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:41,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:41,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:56:41,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756714047] [2021-11-07 01:56:41,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:56:41,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:56:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:56:41,249 INFO L87 Difference]: Start difference. First operand 12535 states and 23567 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:56:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:41,584 INFO L93 Difference]: Finished difference Result 24982 states and 46977 transitions. [2021-11-07 01:56:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:56:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-07 01:56:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:41,617 INFO L225 Difference]: With dead ends: 24982 [2021-11-07 01:56:41,618 INFO L226 Difference]: Without dead ends: 12461 [2021-11-07 01:56:41,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 01:56:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12461 states. [2021-11-07 01:56:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12461 to 12461. [2021-11-07 01:56:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12461 states, 12451 states have (on average 1.881214360292346) internal successors, (23423), 12460 states have internal predecessors, (23423), 0 states have call successors, (0), 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 01:56:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12461 states to 12461 states and 23423 transitions. [2021-11-07 01:56:42,153 INFO L78 Accepts]: Start accepts. Automaton has 12461 states and 23423 transitions. Word has length 32 [2021-11-07 01:56:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:42,153 INFO L470 AbstractCegarLoop]: Abstraction has 12461 states and 23423 transitions. [2021-11-07 01:56:42,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:56:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 12461 states and 23423 transitions. [2021-11-07 01:56:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:56:42,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:42,156 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] [2021-11-07 01:56:42,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:56:42,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:42,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:56:42,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1974581796, now seen corresponding path program 1 times [2021-11-07 01:56:42,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:42,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444911527] [2021-11-07 01:56:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:42,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:42,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:42,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:42,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:56:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:42,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:56:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:42,866 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 01:56:42,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:42,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:42,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444911527] [2021-11-07 01:56:42,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444911527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:42,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:42,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:56:42,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170707441] [2021-11-07 01:56:42,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:56:42,999 INFO L87 Difference]: Start difference. First operand 12461 states and 23423 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 01:56:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:43,970 INFO L93 Difference]: Finished difference Result 24896 states and 46809 transitions. [2021-11-07 01:56:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:56:43,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:56:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:44,009 INFO L225 Difference]: With dead ends: 24896 [2021-11-07 01:56:44,009 INFO L226 Difference]: Without dead ends: 12461 [2021-11-07 01:56:44,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12461 states. [2021-11-07 01:56:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12461 to 12461. [2021-11-07 01:56:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12461 states, 12451 states have (on average 1.8804112119508474) internal successors, (23413), 12460 states have internal predecessors, (23413), 0 states have call successors, (0), 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 01:56:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12461 states to 12461 states and 23413 transitions. [2021-11-07 01:56:44,549 INFO L78 Accepts]: Start accepts. Automaton has 12461 states and 23413 transitions. Word has length 34 [2021-11-07 01:56:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 12461 states and 23413 transitions. [2021-11-07 01:56:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 01:56:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 12461 states and 23413 transitions. [2021-11-07 01:56:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:56:44,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:44,555 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:44,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:56:44,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:44,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:56:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash 380427730, now seen corresponding path program 1 times [2021-11-07 01:56:44,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:44,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446223161] [2021-11-07 01:56:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:44,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:44,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:44,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:56:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:45,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:45,269 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 01:56:45,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:45,418 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 01:56:45,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:45,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446223161] [2021-11-07 01:56:45,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446223161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:45,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:45,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:56:45,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080710917] [2021-11-07 01:56:45,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:45,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:56:45,421 INFO L87 Difference]: Start difference. First operand 12461 states and 23413 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 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 01:56:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:52,611 INFO L93 Difference]: Finished difference Result 55412 states and 103725 transitions. [2021-11-07 01:56:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:56:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:56:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:52,730 INFO L225 Difference]: With dead ends: 55412 [2021-11-07 01:56:52,731 INFO L226 Difference]: Without dead ends: 43021 [2021-11-07 01:56:52,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:56:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43021 states. [2021-11-07 01:56:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43021 to 22116. [2021-11-07 01:56:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22116 states, 22106 states have (on average 1.8797159142314304) internal successors, (41553), 22115 states have internal predecessors, (41553), 0 states have call successors, (0), 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 01:56:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22116 states to 22116 states and 41553 transitions. [2021-11-07 01:56:53,864 INFO L78 Accepts]: Start accepts. Automaton has 22116 states and 41553 transitions. Word has length 38 [2021-11-07 01:56:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:53,865 INFO L470 AbstractCegarLoop]: Abstraction has 22116 states and 41553 transitions. [2021-11-07 01:56:53,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 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 01:56:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22116 states and 41553 transitions. [2021-11-07 01:56:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:56:53,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:53,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:53,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:54,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:54,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:56:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:54,081 INFO L85 PathProgramCache]: Analyzing trace with hash -312286227, now seen corresponding path program 1 times [2021-11-07 01:56:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:54,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82083532] [2021-11-07 01:56:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:54,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:54,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:54,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:54,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:56:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:54,652 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 01:56:54,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:54,773 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 01:56:54,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:54,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82083532] [2021-11-07 01:56:54,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82083532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:54,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:54,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:56:54,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776633959] [2021-11-07 01:56:54,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:56:54,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:56:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:56:54,776 INFO L87 Difference]: Start difference. First operand 22116 states and 41553 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 01:57:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:02,279 INFO L93 Difference]: Finished difference Result 185685 states and 349118 transitions. [2021-11-07 01:57:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:57:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:57:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:02,665 INFO L225 Difference]: With dead ends: 185685 [2021-11-07 01:57:02,666 INFO L226 Difference]: Without dead ends: 163639 [2021-11-07 01:57:02,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163639 states. [2021-11-07 01:57:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163639 to 41555. [2021-11-07 01:57:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41555 states, 41545 states have (on average 1.8791912384161753) internal successors, (78071), 41554 states have internal predecessors, (78071), 0 states have call successors, (0), 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 01:57:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41555 states to 41555 states and 78071 transitions. [2021-11-07 01:57:05,294 INFO L78 Accepts]: Start accepts. Automaton has 41555 states and 78071 transitions. Word has length 38 [2021-11-07 01:57:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:05,295 INFO L470 AbstractCegarLoop]: Abstraction has 41555 states and 78071 transitions. [2021-11-07 01:57:05,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 01:57:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 41555 states and 78071 transitions. [2021-11-07 01:57:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:57:05,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:05,296 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] [2021-11-07 01:57:05,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:05,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:05,501 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:57:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:05,502 INFO L85 PathProgramCache]: Analyzing trace with hash 364115817, now seen corresponding path program 1 times [2021-11-07 01:57:05,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:05,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891142430] [2021-11-07 01:57:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:05,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:05,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:05,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:57:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:05,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:57:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:06,032 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 01:57:06,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:06,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:06,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891142430] [2021-11-07 01:57:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891142430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:06,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:06,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:06,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272501018] [2021-11-07 01:57:06,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:06,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:06,107 INFO L87 Difference]: Start difference. First operand 41555 states and 78071 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 01:57:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:08,881 INFO L93 Difference]: Finished difference Result 123505 states and 232019 transitions. [2021-11-07 01:57:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-07 01:57:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:09,051 INFO L225 Difference]: With dead ends: 123505 [2021-11-07 01:57:09,051 INFO L226 Difference]: Without dead ends: 81982 [2021-11-07 01:57:09,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 01:57:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81982 states. [2021-11-07 01:57:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81982 to 41431. [2021-11-07 01:57:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41431 states, 41421 states have (on average 1.878829579198957) internal successors, (77823), 41430 states have internal predecessors, (77823), 0 states have call successors, (0), 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 01:57:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41431 states to 41431 states and 77823 transitions. [2021-11-07 01:57:10,868 INFO L78 Accepts]: Start accepts. Automaton has 41431 states and 77823 transitions. Word has length 39 [2021-11-07 01:57:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:10,868 INFO L470 AbstractCegarLoop]: Abstraction has 41431 states and 77823 transitions. [2021-11-07 01:57:10,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 01:57:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 41431 states and 77823 transitions. [2021-11-07 01:57:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:57:10,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:10,869 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] [2021-11-07 01:57:10,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:11,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:11,072 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:57:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:11,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1878207738, now seen corresponding path program 1 times [2021-11-07 01:57:11,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:11,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427245482] [2021-11-07 01:57:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:11,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:11,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:11,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:57:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:57:11,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:11,583 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 01:57:11,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:11,715 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 01:57:11,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:11,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427245482] [2021-11-07 01:57:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427245482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:11,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:11,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:57:11,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187782030] [2021-11-07 01:57:11,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:11,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:11,717 INFO L87 Difference]: Start difference. First operand 41431 states and 77823 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:25,776 INFO L93 Difference]: Finished difference Result 157092 states and 294541 transitions. [2021-11-07 01:57:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:57:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:57:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:26,128 INFO L225 Difference]: With dead ends: 157092 [2021-11-07 01:57:26,129 INFO L226 Difference]: Without dead ends: 115695 [2021-11-07 01:57:26,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:57:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115695 states. [2021-11-07 01:57:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115695 to 80901. [2021-11-07 01:57:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80901 states, 80891 states have (on average 1.8627412196659703) internal successors, (150679), 80900 states have internal predecessors, (150679), 0 states have call successors, (0), 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 01:57:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80901 states to 80901 states and 150679 transitions. [2021-11-07 01:57:29,295 INFO L78 Accepts]: Start accepts. Automaton has 80901 states and 150679 transitions. Word has length 39 [2021-11-07 01:57:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:29,296 INFO L470 AbstractCegarLoop]: Abstraction has 80901 states and 150679 transitions. [2021-11-07 01:57:29,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 80901 states and 150679 transitions. [2021-11-07 01:57:29,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:57:29,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:29,297 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] [2021-11-07 01:57:29,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:29,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:29,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:57:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1866550395, now seen corresponding path program 1 times [2021-11-07 01:57:29,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:29,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591678507] [2021-11-07 01:57:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:29,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:29,505 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:29,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bce7e635-186a-4b67-abb0-216c25e9af34/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:57:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:57:29,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:29,983 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 01:57:29,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:30,067 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 01:57:30,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:30,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591678507] [2021-11-07 01:57:30,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591678507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:30,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:30,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:30,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291766927] [2021-11-07 01:57:30,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:30,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:30,070 INFO L87 Difference]: Start difference. First operand 80901 states and 150679 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)